CA2191328C - Apparatus and method for making flexible tubing with helically wound heating conductor - Google Patents
Apparatus and method for making flexible tubing with helically wound heating conductor Download PDFInfo
- Publication number
- CA2191328C CA2191328C CA002191328A CA2191328A CA2191328C CA 2191328 C CA2191328 C CA 2191328C CA 002191328 A CA002191328 A CA 002191328A CA 2191328 A CA2191328 A CA 2191328A CA 2191328 C CA2191328 C CA 2191328C
- Authority
- CA
- Canada
- Prior art keywords
- tubing
- ribbon
- elongate
- bead
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
- A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
- B29C53/582—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material comprising reinforcements, e.g. wires, threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
- B29C53/825—Mandrels especially adapted for winding and joining for continuous winding
- B29C53/827—Mandrels especially adapted for winding and joining for continuous winding formed by several elements rotating about their own axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
- B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/349—Cooling the welding zone on the welding spot
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4329—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms the joint lines being transversal but non-orthogonal with respect to the axis of said tubular articles, i.e. being oblique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/49—Internally supporting the, e.g. tubular, article during joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
- F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
- B29C65/5085—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and comprising grooves, e.g. being E-shaped, H-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0026—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
A helically wound and helically ribbed plastic tubing incorporating an electrically conductive wire and an~~
apparatus and method for making the tubing are disclosed.
A plastic ribbon is wound about an axis into a tube with one edge of each lap overlapping and heat-bonded to an edge of the preceding lap as the tubing is rotated; a conductive wire is embedded in the ribbon; and a bead is applied and heat-sealed onto the tubing, encapsulating the conductive wire during rotation of the tubing, providing a unitary structure including a conductive wire integral to a flexible tubing having a corrugated crevice-free outside and a smooth inside. Coolant is applied to the tubing for cooling the unitary ribbon, wire and bead tubing and to assist in advancing the tubing along the axis.
apparatus and method for making the tubing are disclosed.
A plastic ribbon is wound about an axis into a tube with one edge of each lap overlapping and heat-bonded to an edge of the preceding lap as the tubing is rotated; a conductive wire is embedded in the ribbon; and a bead is applied and heat-sealed onto the tubing, encapsulating the conductive wire during rotation of the tubing, providing a unitary structure including a conductive wire integral to a flexible tubing having a corrugated crevice-free outside and a smooth inside. Coolant is applied to the tubing for cooling the unitary ribbon, wire and bead tubing and to assist in advancing the tubing along the axis.
Description
APPARATUS AND METHOD FOR MAKING FLEXIBLE TUBING WITH
HELICALLY WOUND HEATING CONDUCTOR
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates in general to plastic tubing and, more particularly, to apparatus and methods for making flexible and externally helically ribbed or beaded tubing integrally incorporating at least one elec-trically conductive wire.
HELICALLY WOUND HEATING CONDUCTOR
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates in general to plastic tubing and, more particularly, to apparatus and methods for making flexible and externally helically ribbed or beaded tubing integrally incorporating at least one elec-trically conductive wire.
2. Description of Related Art Tubing having a relatively thin wall and an integral helical supporting bead is known in the art. Such sup port-bead tubing construction provides substantial crush resistance while leaving the tube wall flexible enough to permit short-radius bends without collapsing or kinking the tube. The versatility of this kind of tubing is evi denced by its wide applicability in construction, ventil-ation, manufacturing processes, auto washes, hospitals and other fields.
The walls of a support-bead tubing can be quite thin to minimize overall weight. This light weight for the tubing is an important feature, for example, in an inhalator tube to provide a patient with more comfort during oxygen delivery. Two other features of known thin wall support-bead or bead-reinforced tubing are transparency and smoothness of bore. Transparent plastic material permits inspection of the fluid coursing through the tube, to detect, for example, the presence of moisture in an anesthetic or patient oxygen delivery application. A smooth inner surface of such a tube is desirable to keep the tube free from deposits of contaminants and to discourage nonlaminar flov~.
U.S. Patent No. 3,910,808 to Steward, assigned to the same assignee as this application, discloses apparatus for forming such thin-walled, flexible, crush resistant support-bead tubing. Steward discloses means for extrud-ing a plastic strip having a longitudinal rib, and winding means for helically winding the strip about an axis to produce a corrugated flexible tubing having a smooth bore.
Many applications, however, require or are enhanced by the presence of controlled heating of such tubing.
Neonatal patients, as well as patients in shock or who are sustained on breathing equipment, are among those who benefit from gas flowing through heat-conditioned tubing.
Prior attempts to achieve heating of a tube include providing: a resistance element extending linearly along the tube's axis (U. K. Patent No. 1,448,473 to Grant);
fabric tape secured to a wire and applied to the tube (U.K. Patent No. 897,292 to Reik); or resistive wire in a tubing with no crush-resistant or thin-walled features (U. S. Patent No. 4,038,519 to Foucras; U.S. Patent No. 4,553,023 to Jameson et al.; and U.S. Patent No. RE 29,332 to Bilbro et al.). These tubings and those to be described in more detail in this section have one or more characteristics inconsistent with use in a medical environment. For example, tubing which relies on an adhesive binding for the support bead may deteriorate as a result of repeated sterilization. Materials may be biomedically incompatible, and exteriors are invariably characterized by crevices adjacent to the support bead which can harbor particulate matter and microbes. In addition, the more separate and distinct steps that are required in producing such tubing, the greater the cost, complexity and potential for failure of the product in use.
Another heatable tubing is described by DE 42 44 493A1 to Eilentropp. The '493A1 patent is believed to describe a respiratory tube with a spirally ribbed outer surface upon which electric heating conductors are placed adjacent to the spiral ribs. The heating conductors may be glued on to the outer surface of the tube. The ribs may be formed as a separate smaller tube profile which is then glued to the outer surface of the respiratory tube in a spiral arrangement.
With a respiratory tube according to the '493A1 publica-tion, the resistance wires must be separately secured to the outer surface of the tube, requiring a separate manufacturing step. Also, the separate glue may not provide as secure an attachment of the heating conductors to the respiratory tube as would be desired. There is a distinct possibility of imperfect match between the tube and the glue, and the glue also presents a possibility of solvents being released in the medical environment. As previously mentioned, the glue may not endure steriliza tion as well as the tube itself.
Finally, U.S. Patent No. 3,686,354, issued to Makin, is believed to provide a thin-walled, flexible, but helically-ribbed collapse-resistant hose for inhalation apparatus. An inner thin-walled flexible tubular member defines a helical groove to which is helically secured an outer heater cable. The electrical heating cable is round in cross-section and is bonded to the outer surface of the tubular member by adhesive or vulcanization. With the inhalation hose according to the '354 patent, the helical heater cable does not become an integral part of the inner tubular member, but instead lays in a helical groove of the inner tubular member, defining a helical crevice on each side of the heater cable. This crevice or pair of crevices may provide an area in which soil and bacteria can escape cleaning and sterilizing efforts.
Also, the heat originating at the conductors of the heater cable must be conducted through not only the insulation on this cable but also through to the wall of the inner tube. In fact, these heating conductors would appear to be more directly coupled to the ambient air than to tidal air in the tube.
The walls of a support-bead tubing can be quite thin to minimize overall weight. This light weight for the tubing is an important feature, for example, in an inhalator tube to provide a patient with more comfort during oxygen delivery. Two other features of known thin wall support-bead or bead-reinforced tubing are transparency and smoothness of bore. Transparent plastic material permits inspection of the fluid coursing through the tube, to detect, for example, the presence of moisture in an anesthetic or patient oxygen delivery application. A smooth inner surface of such a tube is desirable to keep the tube free from deposits of contaminants and to discourage nonlaminar flov~.
U.S. Patent No. 3,910,808 to Steward, assigned to the same assignee as this application, discloses apparatus for forming such thin-walled, flexible, crush resistant support-bead tubing. Steward discloses means for extrud-ing a plastic strip having a longitudinal rib, and winding means for helically winding the strip about an axis to produce a corrugated flexible tubing having a smooth bore.
Many applications, however, require or are enhanced by the presence of controlled heating of such tubing.
Neonatal patients, as well as patients in shock or who are sustained on breathing equipment, are among those who benefit from gas flowing through heat-conditioned tubing.
Prior attempts to achieve heating of a tube include providing: a resistance element extending linearly along the tube's axis (U. K. Patent No. 1,448,473 to Grant);
fabric tape secured to a wire and applied to the tube (U.K. Patent No. 897,292 to Reik); or resistive wire in a tubing with no crush-resistant or thin-walled features (U. S. Patent No. 4,038,519 to Foucras; U.S. Patent No. 4,553,023 to Jameson et al.; and U.S. Patent No. RE 29,332 to Bilbro et al.). These tubings and those to be described in more detail in this section have one or more characteristics inconsistent with use in a medical environment. For example, tubing which relies on an adhesive binding for the support bead may deteriorate as a result of repeated sterilization. Materials may be biomedically incompatible, and exteriors are invariably characterized by crevices adjacent to the support bead which can harbor particulate matter and microbes. In addition, the more separate and distinct steps that are required in producing such tubing, the greater the cost, complexity and potential for failure of the product in use.
Another heatable tubing is described by DE 42 44 493A1 to Eilentropp. The '493A1 patent is believed to describe a respiratory tube with a spirally ribbed outer surface upon which electric heating conductors are placed adjacent to the spiral ribs. The heating conductors may be glued on to the outer surface of the tube. The ribs may be formed as a separate smaller tube profile which is then glued to the outer surface of the respiratory tube in a spiral arrangement.
With a respiratory tube according to the '493A1 publica-tion, the resistance wires must be separately secured to the outer surface of the tube, requiring a separate manufacturing step. Also, the separate glue may not provide as secure an attachment of the heating conductors to the respiratory tube as would be desired. There is a distinct possibility of imperfect match between the tube and the glue, and the glue also presents a possibility of solvents being released in the medical environment. As previously mentioned, the glue may not endure steriliza tion as well as the tube itself.
Finally, U.S. Patent No. 3,686,354, issued to Makin, is believed to provide a thin-walled, flexible, but helically-ribbed collapse-resistant hose for inhalation apparatus. An inner thin-walled flexible tubular member defines a helical groove to which is helically secured an outer heater cable. The electrical heating cable is round in cross-section and is bonded to the outer surface of the tubular member by adhesive or vulcanization. With the inhalation hose according to the '354 patent, the helical heater cable does not become an integral part of the inner tubular member, but instead lays in a helical groove of the inner tubular member, defining a helical crevice on each side of the heater cable. This crevice or pair of crevices may provide an area in which soil and bacteria can escape cleaning and sterilizing efforts.
Also, the heat originating at the conductors of the heater cable must be conducted through not only the insulation on this cable but also through to the wall of the inner tube. In fact, these heating conductors would appear to be more directly coupled to the ambient air than to tidal air in the tube.
No prior product, method of manufacture, or apparatus is known which provides a transparent, sterilizable, thin-walled, smooth bore tube having a resistive wire helically imbedded in the outer surface of the tube and fully protected by a contemporaneously wound supporting and encapsulating bead, the bead, wire and tube forming a unitary structure with a smooth, crevice-free outer surface .
SUMMARY OF THE INVENTION
In view of the deficiencies of the related art as discussed above, it is an aspect of the present invention to provide a flexible, lightweight, crush-resistant tubing having an electrically conductive wire and wire-supporting bead helically wound about and integral with the surface of the tubing.
It is another aspect of this invention to provide apparatus and method for inexpensively making a heatable tubing including resistance wire, supporting bead, and tube wall as a unitary body free of adhesive and binders and having a smoothly corrugated outer surface free of crevices.
These and other aspects are provided by the present invention which provides apparatus for combining a thin film or ribbon, a supporting bead, and a conductive wire to make a flexible tubing, and provides a method for producing the tubing in a single winding operation. The present invention employs a winding mechanism which accepts in sequence an extruded plastic flat ribbon, an electrically conductive wire and an extruded supporting bead. The ribbon is helically wrapped so that its edges overlap and simultaneously heat-bond to themselves to form a lap joint. The wire is overlaid along the overlapped edges of the ribbon and the bead is laid atop the wire and heat-bonded to the ribbon at the lap joint, forming a unitary body as described below.
SUMMARY OF THE INVENTION
In view of the deficiencies of the related art as discussed above, it is an aspect of the present invention to provide a flexible, lightweight, crush-resistant tubing having an electrically conductive wire and wire-supporting bead helically wound about and integral with the surface of the tubing.
It is another aspect of this invention to provide apparatus and method for inexpensively making a heatable tubing including resistance wire, supporting bead, and tube wall as a unitary body free of adhesive and binders and having a smoothly corrugated outer surface free of crevices.
These and other aspects are provided by the present invention which provides apparatus for combining a thin film or ribbon, a supporting bead, and a conductive wire to make a flexible tubing, and provides a method for producing the tubing in a single winding operation. The present invention employs a winding mechanism which accepts in sequence an extruded plastic flat ribbon, an electrically conductive wire and an extruded supporting bead. The ribbon is helically wrapped so that its edges overlap and simultaneously heat-bond to themselves to form a lap joint. The wire is overlaid along the overlapped edges of the ribbon and the bead is laid atop the wire and heat-bonded to the ribbon at the lap joint, forming a unitary body as described below.
While other heat-bondable plastics may be successfully used for the flat ribbon, for a variety of medical applications a polyester elastomer such as HYTRELTM 5556 is preferable for its properties including chemical purity, reusability, transparency and resistance to damage from sterilization. Thermoplastic rubbers such as SANTOPRENE~ or thermoplastic elastomers such as SARLINK~ are suitable materials for ribbon formation, although their transparency is inferior to that of HYTRELTM. The bead material is chosen for its ability to heat-bond with the flat ribbon, and may be of the same composition as the ribbon or of a suitable compatible different composition including the materials just mentioned. For heating purposes, the wire conductor is preferably resistive metal such as nickel chromium.
Walls of the tubing are formed by overlapping, heat-bonding and cooling successive laps or convolutions of the flat ribbon as the ribbon is extruded onto canted and rotationally driven winding rolls. The present invention provides a unique wire-feeding mechanism to align the conductive wire precisely along an edge of a ribbon convolution which is sufficiently cooled to prevent the wire from cutting completely through the thin ribbon, yet still warm enough to partially embed the wire in the ribbon.
The configuration of the support bead is defined by splayed surfaces on either side of and cooperatively de-fining a wire-receiving recess. The surfaces are spread apart in order to form a smooth, crevice-free juncture as the bead heat-bonds to the film while the recess receives the wire, the bead thereby surrounding the wire and integrating the ribbon, wire and bead into a unitary structure.
In operation, the ribbon is extruded and helically wound onto the winding rolls from an elevated position with respect to the rolls so that any sag caused by low viscosity of the extrudate is reduced or eliminated.
Walls of the tubing are formed by overlapping, heat-bonding and cooling successive laps or convolutions of the flat ribbon as the ribbon is extruded onto canted and rotationally driven winding rolls. The present invention provides a unique wire-feeding mechanism to align the conductive wire precisely along an edge of a ribbon convolution which is sufficiently cooled to prevent the wire from cutting completely through the thin ribbon, yet still warm enough to partially embed the wire in the ribbon.
The configuration of the support bead is defined by splayed surfaces on either side of and cooperatively de-fining a wire-receiving recess. The surfaces are spread apart in order to form a smooth, crevice-free juncture as the bead heat-bonds to the film while the recess receives the wire, the bead thereby surrounding the wire and integrating the ribbon, wire and bead into a unitary structure.
In operation, the ribbon is extruded and helically wound onto the winding rolls from an elevated position with respect to the rolls so that any sag caused by low viscosity of the extrudate is reduced or eliminated.
After several laps of the ribbon are wound on the rolls, resistance wire is paid out through the wire-feeding means to a draw point on a lap joint of the rotating workpiece where the workpiece surface is still warm enough to partially embed the wire.
Thereafter, the supporting bead is extruded over the wire on a lap joint selected so that the bead fully encapsulates the wire that is still partially embedded in the outer wall of the rotating tubing.
The unitary construction just described has a significant advantage in addition to the foregoing resistance to the accumulation of soil and bacteria and inherent supportive strength. Since a primary purpose of the tubing is to heat the tidal fluid within the bore, substantial benefit is derived by insulating the heating wire from ambient conditions, as accomplished by the encapsulating bead. Moreover, the internal fluid is separated from the heating wire by only the thin wall of the tubing, resulting in enhanced transfer of heat energy to the tidal fluid.
According to another aspect of the present invention, there is provided a thin-walled, flexible and collapse-resistant plastic tubing having a substantially smooth bore for conducting tidal air flow and a helical outer support bead, the tubing including an electrical resistance conductor for heating tidal air flow in said bore, said tubing comprising: a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another so that a thin-walled elongate tubular body is formed; said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along said flexible tubing wall adjacent to an outer one of said opposite side edges; and said helical outer support bead including an elongate thermoplastic support bead disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith encapsulating said electrical resistance heating conductor; whereby said electrical resistance heating conductor is insulated from said tidal air flow by only a single thickness of said ribbon, but is insulated from ambient conditions outwardly of said tubing by said elongate thermoplastic support bead.
According to still another aspect of the present invention, there is provided an apparatus for making helically wound seamless flexible tubing having an integral helical external support bead encapsulating an electrically conductive wire, said apparatus comprising:
first extrusion means for extruding a flat plastic ribbon having opposite side edges; winding means for helically winding said flat ribbon in laps about an axis to form the wall of a flexible tubing rotatable about said axis with one of said opposite side edges of said ribbon at each lap overlapping and heat-bonded to a side edge of an immediately preceding lap to form a helical lap joint, said winding means including rotationally driven rolls circumferentially spaced apart around and extending in a downstream direction of said axis; means for feeding said conductive wire continuously adjacent to an outer one of said overlapping edges of said each lap joint; second extrusion means for extruding a plastic bead helically applied atop both said helical lap joint and said conductive wire and heat-bonding onto said tubing wall to form a unitary body therewith encapsulating said conductive wire; and cooling means for cooling said tubing.
According to yet another aspect of the present invention, there is provided a method for making a _g_ helically wound, seamless plastic tubing comprising the steps of: forming an elongate ribbon of molten thermo-plastic having opposite side edges, helically wrapping said elongate ribbon so that said opposite side edges overlap a certain distance to form a helical lap joint and simultaneously heat-bonding said ribbon to itself to form an elongate tubular body; laying an elongate, electrical heating conductor helically around and along said tubular body; forming an elongate bead of thermoplastic material; and helically wrapping said bead around and along said tubular body atop said electrical conductor and simultaneously heat-bonding said bead with said ribbon to form a unitary body including said ribbon and said bead with said electrical conductor embedded therebetween.
According to a further aspect of the present invention, there is provided a thin-walled, flexible and collapse-resistant plastic tubing having a wall with a substantially smooth bore for communicating fluid, and a helical radially outwardly extending support bead carried upon said wall, the tubing including an electrical resistance conductor embedded within said support bead, which resistance conductor has a comparatively conductive heat transfer relationship to fluid within said bore and a less conductive and more insulative heat transfer relationship with ambient conditions outside of said tubing wall, said tubing comprising: a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another forming a thin-walled elongate tubular body; said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along the length of said flexible tubing wall atop said elongate thermoplastic ribbon and adjacent to an outer one of said opposite side edges; and said helical radially outwardly extending support bead including an elongate thermoplastic support bead having a thickness in the radial direction of said tubing which is substantially greater than said ribbon and being disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith and encapsulating said electrical resistance heating conductor; whereby said electrical resistance heating conductor is insulated from said fluid by only the single thickness of said elongate thermoplastic ribbon forming said tubing wall but is insulated from ambient conditions by said elongate thermoplastic support bead, and said elongate thermoplastic support bead provides collapse-resistance to said tubing wall.
Further applications of the present invention will be apparent to those skilled in the art from a consideration of a fully detailed exemplary embodiment thereof. To aid in the explanation of the exemplary embodiment, reference will be made to the figures of the appended sheets of drawings, which figures will first be described briefly.
BRIEF DESCRIPTION OF THE DRAWINGS
The advantages and features of the present invention will be better understood by the following description when considered in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic plan view illustrating the features of an exemplary embodiment of this invention and wherein parts of the apparatus are relocated for clarity of illustration;
Fig. 2 is a schematic illustration of a workpiece cross-section showing the sequential placement of the lap joint bonded ribbon, wire, and external support-bead feature of the invention;
Fig. 3 is a fragmentary elevation view, partly in cross-section, of the tubing of the invention in an unflexed condition;
Fig. 4 is an elevation view of the tubing of Fig. 3 in a flexed condition;
Fig. 5 is an isometric view illustrating the machine, steps in the process, and resulting product of the invention;
Fig. 6 is a section view taken along lines 6-6 of Fig. 1 with typical draw angles of extrudates and wire shown for clarity;
Fig. 7 is a section view of a bead portion of the flexible tubing product taken along line 7-7 of Fig. 5;
Fig. 8 is an enlarged section view of a wall portion of the tubing of Fig. 3 illustrating the unitary construction of the wall, bead and wire of the invention;
Fig. 9 provides an enlarged fragmentary cross-sec-tional view similar to Fig. 3, but showing an alternative embodiment of the invention; and Fig. 10 is a greatly enlarged fragmentary view of a portion of Fig. 9.
DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
An embodiment of the invention including steps in the process of making the tubing product is illustrated generally in Figs. 1 and 5. Fig. 1 illustrates apparatus 10 including winding means 12 having four cantilevered and rotationally driven winding rolls 14, canted and spaced about a longitudinal axis 16 for wind ing and rotationally advancing a helically wound and ribbed heatable flexible tubing 18. The rolls 14 rotate in unison in a clockwise direction as illustrated in Fig. 6.
Apparatus 10 includes also first extrusion means 20 for extruding a heat bondable flat ribbon 22 having a leading edge 24 and trailing edge 26 and second extrusion means 30 for extruding a heat bondable bead 32. Although extrusion means 20 and 30 are shown as physically separate components for ease of explanation in Fig. 1, it should be understood that both ribbon 22 and bead 32 may be extruded from co-located dies corresponding to very small draw angles as described later with reference to Fig. 6.
Ribbon 22 is wrapped about the rolls 14 and is ad-vanced helically toward the left, viewing Figs. 1 and 5, so that it encircles the rolls 14 and wraps upon itself with a certain overlap, as seen in Fig. 2, to form successive convolutions 28. The adjacent convolutions or laps of the film 22 are heat-bonded to adjacent convolutions at a lap joint 29 cooperatively defined by adjacent convolutions 28.
Referring again to Figs. 1 and 5, apparatus 10 in-cludes wire feeding means 34 employing payout mechanism 36 for feeding and embedding electrically conductive wire 38 along leading edge 24 of each convolution or lap 28 just prior to application of bead 32 to tube 18 as shown. Wire 38 is shown in Fig. 2 partially imbedded in each ribbon convolution 28 and positioned adjacent leading edge 24, awaiting the laying on and heat-bonding of bead 32. For ease of explanation, both lap joints 29 and the V-shape of bead 32 are exaggerated in schematic Fig. 2. In reality, lap joints 29 are virtually coplanar heat bonds, and bead 32 forms an integral part of laps 28 at joints 29, com-pletely encircling wire 38, as more clearly shown in Figs. 3 and 8. The canting of winding rolls 14 causes tubing 18 to move continuously off winding means 12, defining the downstream direction of tubing 18 movement, as designated by directional arrow 39 in Figs. 1 and 5.
Cooling means including a conduit 13 (Fig. 6) within winding means 12 sprays water directed radially outwardly against the inner surface of the tubing 18, and also in a downstream direction which assists in discharging tubing 18 from winding means 12.
The resulting tubing 18 is shown in more detail in Figs. 3 and 4. Fig. 3 illustrates tubing 18 in an un-flexed condition with bead 32 and wire 38 in cross-sec-tion, showing the relationship of bead 32 encapsulating wire 38 and covering lap joint 29. Bead 32 forms a smooth, crevice-free juncture with ribbon 38 on both sides of bead 32. Fig. 4 shows how tubing 18 may be bent to a small radius, forming buckles 40 on the inner side of the bend.
One specific arrangement for the wire feeding means is illustrated in Fig. 5. Trough 42 in extension arm 44 forms a guide for wire 38 as it is fed from a known payout mechanism 36 through wheel bearings or pulleys 46 mounted on base plate 48. Base plate 48 is secured to sliding block 50 which traverses mounting arm 52 and is restricted from lateral movement by face plate 58.
Mounting arm 52 is clamped to a back plate 54 of winding means 12. Longitudinal placement of extension arm 44 relative to the axis 16 of winding means 12 is achieved by the sliding of block 50 along mounting arm 52 until wire 38 is positioned before extruded bead 32 at a leading edge 24 of a lap 28. Guiding rod 56 is fixed to sliding block 50 and extends through aperture 60 in vertical stop 62 mounted at the downstream end of mounting arm 52. Sliding block 50 is biased towards the upstream or winding means back plate end of mounting arm 52 by a coil spring 64 encircling guiding rod 56.
Adjustment nut 66 at the downstream end 68 of guiding rod 56 is adjusted to fix extension arm 44 in place.
An extrudate such as HYTRELTM 5556 polyester elastomer is particularly suited for medical uses because of its purity, sterilizability, transparency and high strength.
Because of the relatively low viscosity of such an extru-date, a vertical or near vertical draw angle from die to lap at powered rolls 14 is preferable. Fig. 6 illustrates draw angles from the vertical "~," and "f3" for ribbon 22 and bead 32 respectively. Angles a and i~
preferably may be in the range of 0~ to 45~ depending on viscosity of extrudate and convenience of die placement, with 45~ representing an experimentally preferable angle for both the bead 32 and the ribbon 22. As angles a and f~ approach 0~, the extrusion means for ribbon 22 and bead 32 are positioned successively closer to one another, and ultimately a single extruder may be used to provide both ribbon 22 and bead 32. On the other hand, with presently available materials having a greater melt viscosity and cohesiveness than HYTRELTM, or with other materials which may become available in the future having such greater melt viscosity and cohesiveness, the angles a and f3 may be greater than 45~ from the vertical. In other words, the draw angles a and i3 may approach or even pass the horizontal with a material having a sufficient body in its extrudate condition. Moreover, although ribbon 22 is illustrated in Fig. 6 as descending onto rolls 14 from the right of bead 32, it will be appreciated that ribbon 22 and bead 32 may descend as well from positions inter-changeable with one another. Bead 32 is fed onto each lap 28 at a point following the draw point of wire 38 so that bead 32 heat bonds with lap 28 as it encapsulates wire 38.
The cross-section of bead 32 is configured as shown in Fig. 7 to facilitate the smooth heat bonding of bead contact edges 70 with ribbon lap 28, while providing a recess 72 between edges 70 to accommodate wire 38 as wire 38 and bead 32 are sequentially drawn onto tubing 18. Splayed edges 70 provide a smooth interface with ribbon lap 28, as illustrated in Fig. 3, inhibiting the accumulation of microbes and particulate matter that are typical of the sharp angles resulting from traditional bead-forming practice.
Heated bead 32 surrounds embedded wire 38 forming a unitary structure with ribbon lap 28 as shown in more detail in Fig. 8. The greater bulk of bead 32 is shown separating resistance wire 38 from the ambient environ-ment, inhibiting loss of heat energy external to tubing 18 from resistance wire 38. Conversely, the separation between resistance wire 38 and the internal surface 74 of tubing 18 is minimal, facilitating efficient transfer of heat to the tidal fluid within the tubing 18 bore.
Viewing now Figs. 9 and 10, an alternative embodiment of the present invention is presented. In order to obtain reference numerals for use in describing the embodiment of Figs. 9 and 10, features which are the same, or which are analogous in structure or function to those described above, are referenced with the same numeral used above, and having a prime added thereto.
Figs. 9 and 10 in conjunction show that this embodi-ment of the tubing 18' includes flat film 22' helically wrapped on itself and overlapped to form a lap joint at 28' to form a thin walled flexible tube upon which a helical bead 32' is applied and integrally heat-bonded atop the joint 28'. Under the bead 32' and adjacent to an outer edge of the film 22' is positioned a heating conductor, generally referenced with the numeral 38'.
However as Figs. 9 and 10 depict, the conductor 38' is not a single conductor like conductor 38 of Figs. 1-8.
More particularly, heating conductor 38' includes a pair of parallel, but slightly spaced apart single heating conductors 74, which are carried in an insulating jacket 76. The conductors 74 may be similar to or the same as conductor 38 described above. Jacket 76 may be made of polyurethane, for example, and spans the spacing between the single conductors 74 so that the heating conductor 38' is in fact a small twin-lead cable construction.
During manufacture of the tubing construction 18' seen in Figs. 9 and 10, the conductor 38' is fed into the depicted position just before the bead 32' is applied using a wire feeder like the device 34 depicted and described with respect to the first embodiment of the invention. However, the wire trough 42 is made wide enough to accept and guide the twin-lead conductor 38'.
An advantage of the tubing construction 18' seen in Figs. 9 and 10 is that the two conductors 74 may be used to form opposite sides of a heating circuit. That is, electrical connections to the conductors 74 are made individually at one end of a length of the tubing 18'.
Adjacent to the opposite end of the length of the tubing 18', the bead 32' is partially stripped away to expose the conductor 38'. Electrical connection between the conductors 74 is then effected at this location. As described, the tubing 18' has a particular advantage for use with a medical patient ventilator apparatus. That is, the electrical connections to the tubing can be effected at the proximal end near the ventilator. At the distal end of the length of tubing near the patient, connection of the conductors 74 to one another is all that is needed to complete the electrical heating circuit of the tubing 18.
V~hile two exemplary forms of the invention have been shown in the drawings and described, variations from the exemplary forms will be apparent to those skilled in the art. The invention therefore should not be construed as limited to the specific forms shown and described, but instead as is set forth in the following claims.
Thereafter, the supporting bead is extruded over the wire on a lap joint selected so that the bead fully encapsulates the wire that is still partially embedded in the outer wall of the rotating tubing.
The unitary construction just described has a significant advantage in addition to the foregoing resistance to the accumulation of soil and bacteria and inherent supportive strength. Since a primary purpose of the tubing is to heat the tidal fluid within the bore, substantial benefit is derived by insulating the heating wire from ambient conditions, as accomplished by the encapsulating bead. Moreover, the internal fluid is separated from the heating wire by only the thin wall of the tubing, resulting in enhanced transfer of heat energy to the tidal fluid.
According to another aspect of the present invention, there is provided a thin-walled, flexible and collapse-resistant plastic tubing having a substantially smooth bore for conducting tidal air flow and a helical outer support bead, the tubing including an electrical resistance conductor for heating tidal air flow in said bore, said tubing comprising: a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another so that a thin-walled elongate tubular body is formed; said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along said flexible tubing wall adjacent to an outer one of said opposite side edges; and said helical outer support bead including an elongate thermoplastic support bead disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith encapsulating said electrical resistance heating conductor; whereby said electrical resistance heating conductor is insulated from said tidal air flow by only a single thickness of said ribbon, but is insulated from ambient conditions outwardly of said tubing by said elongate thermoplastic support bead.
According to still another aspect of the present invention, there is provided an apparatus for making helically wound seamless flexible tubing having an integral helical external support bead encapsulating an electrically conductive wire, said apparatus comprising:
first extrusion means for extruding a flat plastic ribbon having opposite side edges; winding means for helically winding said flat ribbon in laps about an axis to form the wall of a flexible tubing rotatable about said axis with one of said opposite side edges of said ribbon at each lap overlapping and heat-bonded to a side edge of an immediately preceding lap to form a helical lap joint, said winding means including rotationally driven rolls circumferentially spaced apart around and extending in a downstream direction of said axis; means for feeding said conductive wire continuously adjacent to an outer one of said overlapping edges of said each lap joint; second extrusion means for extruding a plastic bead helically applied atop both said helical lap joint and said conductive wire and heat-bonding onto said tubing wall to form a unitary body therewith encapsulating said conductive wire; and cooling means for cooling said tubing.
According to yet another aspect of the present invention, there is provided a method for making a _g_ helically wound, seamless plastic tubing comprising the steps of: forming an elongate ribbon of molten thermo-plastic having opposite side edges, helically wrapping said elongate ribbon so that said opposite side edges overlap a certain distance to form a helical lap joint and simultaneously heat-bonding said ribbon to itself to form an elongate tubular body; laying an elongate, electrical heating conductor helically around and along said tubular body; forming an elongate bead of thermoplastic material; and helically wrapping said bead around and along said tubular body atop said electrical conductor and simultaneously heat-bonding said bead with said ribbon to form a unitary body including said ribbon and said bead with said electrical conductor embedded therebetween.
According to a further aspect of the present invention, there is provided a thin-walled, flexible and collapse-resistant plastic tubing having a wall with a substantially smooth bore for communicating fluid, and a helical radially outwardly extending support bead carried upon said wall, the tubing including an electrical resistance conductor embedded within said support bead, which resistance conductor has a comparatively conductive heat transfer relationship to fluid within said bore and a less conductive and more insulative heat transfer relationship with ambient conditions outside of said tubing wall, said tubing comprising: a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another forming a thin-walled elongate tubular body; said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along the length of said flexible tubing wall atop said elongate thermoplastic ribbon and adjacent to an outer one of said opposite side edges; and said helical radially outwardly extending support bead including an elongate thermoplastic support bead having a thickness in the radial direction of said tubing which is substantially greater than said ribbon and being disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith and encapsulating said electrical resistance heating conductor; whereby said electrical resistance heating conductor is insulated from said fluid by only the single thickness of said elongate thermoplastic ribbon forming said tubing wall but is insulated from ambient conditions by said elongate thermoplastic support bead, and said elongate thermoplastic support bead provides collapse-resistance to said tubing wall.
Further applications of the present invention will be apparent to those skilled in the art from a consideration of a fully detailed exemplary embodiment thereof. To aid in the explanation of the exemplary embodiment, reference will be made to the figures of the appended sheets of drawings, which figures will first be described briefly.
BRIEF DESCRIPTION OF THE DRAWINGS
The advantages and features of the present invention will be better understood by the following description when considered in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic plan view illustrating the features of an exemplary embodiment of this invention and wherein parts of the apparatus are relocated for clarity of illustration;
Fig. 2 is a schematic illustration of a workpiece cross-section showing the sequential placement of the lap joint bonded ribbon, wire, and external support-bead feature of the invention;
Fig. 3 is a fragmentary elevation view, partly in cross-section, of the tubing of the invention in an unflexed condition;
Fig. 4 is an elevation view of the tubing of Fig. 3 in a flexed condition;
Fig. 5 is an isometric view illustrating the machine, steps in the process, and resulting product of the invention;
Fig. 6 is a section view taken along lines 6-6 of Fig. 1 with typical draw angles of extrudates and wire shown for clarity;
Fig. 7 is a section view of a bead portion of the flexible tubing product taken along line 7-7 of Fig. 5;
Fig. 8 is an enlarged section view of a wall portion of the tubing of Fig. 3 illustrating the unitary construction of the wall, bead and wire of the invention;
Fig. 9 provides an enlarged fragmentary cross-sec-tional view similar to Fig. 3, but showing an alternative embodiment of the invention; and Fig. 10 is a greatly enlarged fragmentary view of a portion of Fig. 9.
DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
An embodiment of the invention including steps in the process of making the tubing product is illustrated generally in Figs. 1 and 5. Fig. 1 illustrates apparatus 10 including winding means 12 having four cantilevered and rotationally driven winding rolls 14, canted and spaced about a longitudinal axis 16 for wind ing and rotationally advancing a helically wound and ribbed heatable flexible tubing 18. The rolls 14 rotate in unison in a clockwise direction as illustrated in Fig. 6.
Apparatus 10 includes also first extrusion means 20 for extruding a heat bondable flat ribbon 22 having a leading edge 24 and trailing edge 26 and second extrusion means 30 for extruding a heat bondable bead 32. Although extrusion means 20 and 30 are shown as physically separate components for ease of explanation in Fig. 1, it should be understood that both ribbon 22 and bead 32 may be extruded from co-located dies corresponding to very small draw angles as described later with reference to Fig. 6.
Ribbon 22 is wrapped about the rolls 14 and is ad-vanced helically toward the left, viewing Figs. 1 and 5, so that it encircles the rolls 14 and wraps upon itself with a certain overlap, as seen in Fig. 2, to form successive convolutions 28. The adjacent convolutions or laps of the film 22 are heat-bonded to adjacent convolutions at a lap joint 29 cooperatively defined by adjacent convolutions 28.
Referring again to Figs. 1 and 5, apparatus 10 in-cludes wire feeding means 34 employing payout mechanism 36 for feeding and embedding electrically conductive wire 38 along leading edge 24 of each convolution or lap 28 just prior to application of bead 32 to tube 18 as shown. Wire 38 is shown in Fig. 2 partially imbedded in each ribbon convolution 28 and positioned adjacent leading edge 24, awaiting the laying on and heat-bonding of bead 32. For ease of explanation, both lap joints 29 and the V-shape of bead 32 are exaggerated in schematic Fig. 2. In reality, lap joints 29 are virtually coplanar heat bonds, and bead 32 forms an integral part of laps 28 at joints 29, com-pletely encircling wire 38, as more clearly shown in Figs. 3 and 8. The canting of winding rolls 14 causes tubing 18 to move continuously off winding means 12, defining the downstream direction of tubing 18 movement, as designated by directional arrow 39 in Figs. 1 and 5.
Cooling means including a conduit 13 (Fig. 6) within winding means 12 sprays water directed radially outwardly against the inner surface of the tubing 18, and also in a downstream direction which assists in discharging tubing 18 from winding means 12.
The resulting tubing 18 is shown in more detail in Figs. 3 and 4. Fig. 3 illustrates tubing 18 in an un-flexed condition with bead 32 and wire 38 in cross-sec-tion, showing the relationship of bead 32 encapsulating wire 38 and covering lap joint 29. Bead 32 forms a smooth, crevice-free juncture with ribbon 38 on both sides of bead 32. Fig. 4 shows how tubing 18 may be bent to a small radius, forming buckles 40 on the inner side of the bend.
One specific arrangement for the wire feeding means is illustrated in Fig. 5. Trough 42 in extension arm 44 forms a guide for wire 38 as it is fed from a known payout mechanism 36 through wheel bearings or pulleys 46 mounted on base plate 48. Base plate 48 is secured to sliding block 50 which traverses mounting arm 52 and is restricted from lateral movement by face plate 58.
Mounting arm 52 is clamped to a back plate 54 of winding means 12. Longitudinal placement of extension arm 44 relative to the axis 16 of winding means 12 is achieved by the sliding of block 50 along mounting arm 52 until wire 38 is positioned before extruded bead 32 at a leading edge 24 of a lap 28. Guiding rod 56 is fixed to sliding block 50 and extends through aperture 60 in vertical stop 62 mounted at the downstream end of mounting arm 52. Sliding block 50 is biased towards the upstream or winding means back plate end of mounting arm 52 by a coil spring 64 encircling guiding rod 56.
Adjustment nut 66 at the downstream end 68 of guiding rod 56 is adjusted to fix extension arm 44 in place.
An extrudate such as HYTRELTM 5556 polyester elastomer is particularly suited for medical uses because of its purity, sterilizability, transparency and high strength.
Because of the relatively low viscosity of such an extru-date, a vertical or near vertical draw angle from die to lap at powered rolls 14 is preferable. Fig. 6 illustrates draw angles from the vertical "~," and "f3" for ribbon 22 and bead 32 respectively. Angles a and i~
preferably may be in the range of 0~ to 45~ depending on viscosity of extrudate and convenience of die placement, with 45~ representing an experimentally preferable angle for both the bead 32 and the ribbon 22. As angles a and f~ approach 0~, the extrusion means for ribbon 22 and bead 32 are positioned successively closer to one another, and ultimately a single extruder may be used to provide both ribbon 22 and bead 32. On the other hand, with presently available materials having a greater melt viscosity and cohesiveness than HYTRELTM, or with other materials which may become available in the future having such greater melt viscosity and cohesiveness, the angles a and f3 may be greater than 45~ from the vertical. In other words, the draw angles a and i3 may approach or even pass the horizontal with a material having a sufficient body in its extrudate condition. Moreover, although ribbon 22 is illustrated in Fig. 6 as descending onto rolls 14 from the right of bead 32, it will be appreciated that ribbon 22 and bead 32 may descend as well from positions inter-changeable with one another. Bead 32 is fed onto each lap 28 at a point following the draw point of wire 38 so that bead 32 heat bonds with lap 28 as it encapsulates wire 38.
The cross-section of bead 32 is configured as shown in Fig. 7 to facilitate the smooth heat bonding of bead contact edges 70 with ribbon lap 28, while providing a recess 72 between edges 70 to accommodate wire 38 as wire 38 and bead 32 are sequentially drawn onto tubing 18. Splayed edges 70 provide a smooth interface with ribbon lap 28, as illustrated in Fig. 3, inhibiting the accumulation of microbes and particulate matter that are typical of the sharp angles resulting from traditional bead-forming practice.
Heated bead 32 surrounds embedded wire 38 forming a unitary structure with ribbon lap 28 as shown in more detail in Fig. 8. The greater bulk of bead 32 is shown separating resistance wire 38 from the ambient environ-ment, inhibiting loss of heat energy external to tubing 18 from resistance wire 38. Conversely, the separation between resistance wire 38 and the internal surface 74 of tubing 18 is minimal, facilitating efficient transfer of heat to the tidal fluid within the tubing 18 bore.
Viewing now Figs. 9 and 10, an alternative embodiment of the present invention is presented. In order to obtain reference numerals for use in describing the embodiment of Figs. 9 and 10, features which are the same, or which are analogous in structure or function to those described above, are referenced with the same numeral used above, and having a prime added thereto.
Figs. 9 and 10 in conjunction show that this embodi-ment of the tubing 18' includes flat film 22' helically wrapped on itself and overlapped to form a lap joint at 28' to form a thin walled flexible tube upon which a helical bead 32' is applied and integrally heat-bonded atop the joint 28'. Under the bead 32' and adjacent to an outer edge of the film 22' is positioned a heating conductor, generally referenced with the numeral 38'.
However as Figs. 9 and 10 depict, the conductor 38' is not a single conductor like conductor 38 of Figs. 1-8.
More particularly, heating conductor 38' includes a pair of parallel, but slightly spaced apart single heating conductors 74, which are carried in an insulating jacket 76. The conductors 74 may be similar to or the same as conductor 38 described above. Jacket 76 may be made of polyurethane, for example, and spans the spacing between the single conductors 74 so that the heating conductor 38' is in fact a small twin-lead cable construction.
During manufacture of the tubing construction 18' seen in Figs. 9 and 10, the conductor 38' is fed into the depicted position just before the bead 32' is applied using a wire feeder like the device 34 depicted and described with respect to the first embodiment of the invention. However, the wire trough 42 is made wide enough to accept and guide the twin-lead conductor 38'.
An advantage of the tubing construction 18' seen in Figs. 9 and 10 is that the two conductors 74 may be used to form opposite sides of a heating circuit. That is, electrical connections to the conductors 74 are made individually at one end of a length of the tubing 18'.
Adjacent to the opposite end of the length of the tubing 18', the bead 32' is partially stripped away to expose the conductor 38'. Electrical connection between the conductors 74 is then effected at this location. As described, the tubing 18' has a particular advantage for use with a medical patient ventilator apparatus. That is, the electrical connections to the tubing can be effected at the proximal end near the ventilator. At the distal end of the length of tubing near the patient, connection of the conductors 74 to one another is all that is needed to complete the electrical heating circuit of the tubing 18.
V~hile two exemplary forms of the invention have been shown in the drawings and described, variations from the exemplary forms will be apparent to those skilled in the art. The invention therefore should not be construed as limited to the specific forms shown and described, but instead as is set forth in the following claims.
Claims (27)
1. A thin-walled, flexible and collapse-resistant plastic tubing having a substantially smooth bore for conducting tidal air flow and a helical outer support bead, the tubing including an electrical resistance conductor for heating tidal air flow in said bore, said tubing comprising:
a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another so that a thin-walled elongate tubular body is formed;
said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along said flexible tubing wall adjacent to an outer one of said opposite side edges; and said helical outer support bead including an elongate thermoplastic support bead disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith encapsulating said electrical resistance heating conductor;
whereby said electrical resistance heating con-ductor is insulated from said tidal air flow by only a single thickness of said ribbon, but is insulated from ambient conditions outwardly of said tubing by said elongate thermoplastic support bead.
a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another so that a thin-walled elongate tubular body is formed;
said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along said flexible tubing wall adjacent to an outer one of said opposite side edges; and said helical outer support bead including an elongate thermoplastic support bead disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith encapsulating said electrical resistance heating conductor;
whereby said electrical resistance heating con-ductor is insulated from said tidal air flow by only a single thickness of said ribbon, but is insulated from ambient conditions outwardly of said tubing by said elongate thermoplastic support bead.
2. The tubing of claim 1 wherein said elongate thermoplastic ribbon comprises a polyester elastomer.
3. The tubing of claim 1 wherein said elongate thermoplastic support bead comprises a thermoplastic rubber.
4. The tubing of claim 1 wherein said elongate thermoplastic ribbon and said elongate thermoplastic support bead comprise identically the same material.
5. The tubing of claim 1 wherein said resistance heating conductor is a nickel chromium alloy.
6. The tubing of claim 1 wherein said resistance heating conductor includes a pair of parallel conductors spaced apart and insulated from one another.
7. The tubing of claim 6 wherein said resistance heating conductor includes a jacket carrying said pair of conductors in spaced apart parallel relationship to one another.
8. The tubing of claim 7 wherein said pair of conductors is electrically connected together adjacent a distal end of a length of said tubing.
9. An apparatus for making helically wound seamless flexible tubing having an integral helical external support bead encapsulating an electrically conductive wire, said apparatus comprising:
first extrusion means for extruding a flat plastic ribbon having opposite side edges;
winding means for helically winding said flat ribbon in laps about an axis to form the wall of a flexi-ble tubing rotatable about said axis with one of said op-posite side edges of said ribbon at each lap overlapping and heat-bonded to a side edge of an immediately preced-ing lap to form a helical lap joint, said winding means including rotationally driven rolls circumferentially spaced apart around and extending in a downstream direc-tion of said axis;
means for feeding said conductive wire continu-ously adjacent to an outer one of said overlapping edges of said each lap joint;
second extrusion means for extruding a plastic bead helically applied atop both said helical lap joint and said conductive wire and heat-bonding onto said tubing wall to form a unitary body therewith encapsulating said conductive wire; and cooling means for cooling said tubing.
first extrusion means for extruding a flat plastic ribbon having opposite side edges;
winding means for helically winding said flat ribbon in laps about an axis to form the wall of a flexi-ble tubing rotatable about said axis with one of said op-posite side edges of said ribbon at each lap overlapping and heat-bonded to a side edge of an immediately preced-ing lap to form a helical lap joint, said winding means including rotationally driven rolls circumferentially spaced apart around and extending in a downstream direc-tion of said axis;
means for feeding said conductive wire continu-ously adjacent to an outer one of said overlapping edges of said each lap joint;
second extrusion means for extruding a plastic bead helically applied atop both said helical lap joint and said conductive wire and heat-bonding onto said tubing wall to form a unitary body therewith encapsulating said conductive wire; and cooling means for cooling said tubing.
10. The apparatus of claim 9 wherein said first extrusion means and said second extrusion means are co-located to provide a single extrusion means for extruding said flat ribbon and said bead.
11. The apparatus of claim 9 wherein said means for feeding said conductive wire further comprises means for simultaneously embedding said wire in the outer surface of said flexible tubing wall.
12. The apparatus of claim 9 wherein said conductive wire comprises a resistance heating conductor for heating said tubing.
13. The apparatus of claim 9 wherein the means for feeding said wire comprises:
a mounting arm clamped adjustably to a back plate of said winding means and extending generally parallel to said winding means axis in said downstream direction;
a sliding block assembly slidably mounted on said mounting arm, said sliding block assembly having an extension arm provided with a longitudinal trough having a proximal entrance end and a distal exit end, said extension arm extending generally perpen-dicular to said mounting arm;
a guiding rod extending generally parallel to said mounting arm having a bias spring and adjustment nut, and mutually opposed bearing wheels positioned on opposite sides of said trough at said entrance end; and means for paying out said wire around said bear-ing wheels and through said trough from said entrance end to said exit end.
a mounting arm clamped adjustably to a back plate of said winding means and extending generally parallel to said winding means axis in said downstream direction;
a sliding block assembly slidably mounted on said mounting arm, said sliding block assembly having an extension arm provided with a longitudinal trough having a proximal entrance end and a distal exit end, said extension arm extending generally perpen-dicular to said mounting arm;
a guiding rod extending generally parallel to said mounting arm having a bias spring and adjustment nut, and mutually opposed bearing wheels positioned on opposite sides of said trough at said entrance end; and means for paying out said wire around said bear-ing wheels and through said trough from said entrance end to said exit end.
14. The apparatus of claim 9 wherein said cooling means further comprises means for assisting the displace-ment of said tubing axially off said winding means.
15. A method for making a helically wound, seamless plastic tubing comprising the steps of:
forming an elongate ribbon of molten thermo-plastic having opposite side edges, helically wrapping said elongate ribbon so that said opposite side edges overlap a certain distance to form a helical lap joint and simultaneously heat-bonding said ribbon to itself to form an elongate tubular body;
laying an elongate, electrical heating conductor helically around and along said tubular body;
forming an elongate bead of thermoplastic material; and helically wrapping said bead around and along said tubular body atop said electrical conductor and simultaneously heat-bonding said bead with said ribbon to form a unitary body including said ribbon and said bead with said electrical conductor embedded therebetween.
forming an elongate ribbon of molten thermo-plastic having opposite side edges, helically wrapping said elongate ribbon so that said opposite side edges overlap a certain distance to form a helical lap joint and simultaneously heat-bonding said ribbon to itself to form an elongate tubular body;
laying an elongate, electrical heating conductor helically around and along said tubular body;
forming an elongate bead of thermoplastic material; and helically wrapping said bead around and along said tubular body atop said electrical conductor and simultaneously heat-bonding said bead with said ribbon to form a unitary body including said ribbon and said bead with said electrical conductor embedded therebetween.
16. The method of claim 15 wherein the step of forming and wrapping said elongate ribbon further com-prises feeding said ribbon at a first draw angle tangen-tial to said elongate tubular body, said first draw angle being in the range of 0° to 90° from the vertical.
17. The method of claim 16 wherein said first draw angle for said ribbon is 45°.
18. The method of claim 15 wherein the step of wrapping said elongate bead further comprises feeding said bead at a second draw angle tangential to said elongate tubular body, said second draw angle being in the range of 0° to 90° from the vertical.
19. The method of claim 18 wherein said second draw angle for said bead is 45°.
20. A thin-walled, flexible and collapse-resistant plastic tubing having a wall with a substantially smooth bore for communicating fluid, and a helical radially outwardly extending support bead carried upon said wall, the tubing including an electrical resistance conductor embedded within said support bead, which resistance conductor has a comparatively conductive heat transfer relationship to fluid within said bore and a less conductive and more insulative heat transfer relationship with ambient conditions outside of said tubing wall, said tubing comprising:
a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another forming a thin-walled elongate tubular body;
said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along the length of said flexible tubing wall atop said elongate thermoplastic ribbon and adjacent to an outer one of said opposite side edges; and said helical radially outwardly extending support bead including an elongate thermoplastic support bead having a thickness in the radial direction of said tubing which is substantially greater than said ribbon and being disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith and encapsulating said electrical resistance heating conductor;
whereby said electrical resistance heating conductor is insulated from said fluid by only the single thickness of said elongate thermoplastic ribbon forming said tubing wall but is insulated from ambient conditions by said elongate thermoplastic support bead, and said elongate thermoplastic support bead provides collapse-resistance to said tubing wall.
a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-bonded to one another forming a thin-walled elongate tubular body;
said electrical resistance conductor including an elongate electrical resistance heating conductor disposed helically around and along the length of said flexible tubing wall atop said elongate thermoplastic ribbon and adjacent to an outer one of said opposite side edges; and said helical radially outwardly extending support bead including an elongate thermoplastic support bead having a thickness in the radial direction of said tubing which is substantially greater than said ribbon and being disposed helically around and along said flexible tubing wall atop both said helical lap joint and said electrical resistance heating conductor and being heat-bonded to said tubing wall to form a unitary body therewith and encapsulating said electrical resistance heating conductor;
whereby said electrical resistance heating conductor is insulated from said fluid by only the single thickness of said elongate thermoplastic ribbon forming said tubing wall but is insulated from ambient conditions by said elongate thermoplastic support bead, and said elongate thermoplastic support bead provides collapse-resistance to said tubing wall.
21. The tubing of claim 20 wherein said elongate thermoplastic ribbon is formed of a polyester elastomer.
22. The tubing of claim 20 wherein said elongate thermoplastic support bead is formed of a thermoplastic rubber.
23. The tubing of claim 20 wherein said elongate thermoplastic ribbon and said elongate thermoplastic support bead are formed of identically the same material.
24. The tubing of claim 20 wherein said resistance heating conductor is a nickel chromium alloy.
25. The tubing of claim 20 wherein said resistance heating conductor includes a pair of parallel conductors spaced apart and insulated from one another.
26. The tubing of claim 25 wherein said resistance heating conductor includes a jacket carrying said pair of conductors in spaced apart parallel relationship to one another forming a twin-lead heating cable, said twin-lead heating cable being disposed with one of said pair of conductors adjacent to said outer one of said overlapped side edges of said elongate thermoplastic ribbon and with the other of said pair of conductors adjacent to said one conductor in side-by-side relationship and with each, conductor of said pair separated from said thermoplastic ribbon only by said jacket.
27. The tubing of claim 26 wherein said pair of conductors is electrically connected together adjacent a distal end of a length of said tubing.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/250,173 US5454061A (en) | 1994-05-27 | 1994-05-27 | Apparatus and method for making flexible tubing with helically wound heating conductor |
US250,173 | 1994-05-27 | ||
PCT/US1995/005357 WO1995033163A1 (en) | 1994-05-27 | 1995-05-01 | Apparatus and method for making flexible tubing with helically wound heating conductor |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2191328A1 CA2191328A1 (en) | 1995-12-07 |
CA2191328C true CA2191328C (en) | 2006-04-18 |
Family
ID=22946591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002191328A Expired - Lifetime CA2191328C (en) | 1994-05-27 | 1995-05-01 | Apparatus and method for making flexible tubing with helically wound heating conductor |
Country Status (6)
Country | Link |
---|---|
US (2) | US5454061A (en) |
EP (1) | EP0760925B1 (en) |
AU (1) | AU679377B2 (en) |
CA (1) | CA2191328C (en) |
DE (1) | DE69527528T2 (en) |
WO (1) | WO1995033163A1 (en) |
Families Citing this family (120)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5848223A (en) * | 1994-05-27 | 1998-12-08 | Steward Plastics, Inc. | Double-walled flexible tubing product with helical support bead and heating conductor and apparatus and method for making |
EP0873148A4 (en) * | 1995-11-13 | 1999-12-29 | Fisher & Paykel | Heated respiratory conduit |
DE19547821A1 (en) * | 1995-12-20 | 1997-06-26 | Karl Heinz Krah Gmbh Werkzeug | Pipe or the like. Fitting made of thermoplastic and process for its production |
US5862303A (en) * | 1996-05-17 | 1999-01-19 | Advanced Metal Technologies, Ltd. | Electrically heated pipe with helically wound amorphous alloy heater |
IT240734Y1 (en) * | 1996-06-13 | 2001-04-11 | Mallinckrodt Medical S P A | VENTILATION PIPE STRUCTURE PARTICULARLY FOR MEDICAL EQUIPMENT |
US6219490B1 (en) * | 1996-06-13 | 2001-04-17 | Mallinckrodt Inc. | Ventilation tube, particularly for medical devices |
US6306235B1 (en) * | 1997-10-16 | 2001-10-23 | Nomaco, Inc. | Spiral formed products and method of manufacture |
US7316677B1 (en) * | 1999-04-30 | 2008-01-08 | Applied Medical Resources Corporation | Ureteral access sheath |
US6435180B1 (en) | 1999-07-01 | 2002-08-20 | J&M Distributors Limited | Method and apparatus for delivering humidified air to a face mask |
US7111624B2 (en) | 2000-03-21 | 2006-09-26 | Fisher & Paykel Healthcare Limited | Apparatus for delivering humidified gases |
US7588029B2 (en) | 2000-03-21 | 2009-09-15 | Fisher & Paykel Healthcare Limited | Humidified gases delivery apparatus |
US6918389B2 (en) | 2000-03-21 | 2005-07-19 | Fisher & Paykel Healthcare Limited | Breathing assistance apparatus |
US7120354B2 (en) | 2000-03-21 | 2006-10-10 | Fisher & Paykel Healthcare Limited | Gases delivery conduit |
BR0102116B1 (en) * | 2000-05-10 | 2010-09-21 | component for a breathing circuit member. | |
US7559324B2 (en) | 2000-06-21 | 2009-07-14 | Fisher & Paykel Healthcare Limited | Conduit with heated wick |
JP4180367B2 (en) | 2000-10-16 | 2008-11-12 | フィッシャー アンド ペイケル ヘルスケア リミテッド | Equipment used for humidifying gases in medical procedures |
US6781099B2 (en) * | 2001-03-12 | 2004-08-24 | Karl-Heinz Krah Gmbh | Electrofusion socket forming system |
US6827109B2 (en) | 2002-03-25 | 2004-12-07 | Salem-Republic Rubber Company | Flexible hose and method of manufacture |
US6932119B2 (en) * | 2002-03-28 | 2005-08-23 | Eric Carlson | Multi-mode tubing product and method |
AU2003244171B2 (en) * | 2002-09-09 | 2007-11-15 | Fisher & Paykel Healthcare Limited | Limb for Breathing Circuit |
US7291240B2 (en) * | 2002-09-09 | 2007-11-06 | Fisher & Paykel Healthcare Limited | Method of forming a conduit using a wound sacrificial layer |
CA2498201C (en) * | 2002-09-11 | 2011-01-04 | Fisher & Paykel Healthcare Limited | Conduits and method of forming |
DE10248978A1 (en) * | 2002-10-21 | 2004-08-05 | Siemens Ag | Hose for a fuel delivery system |
US7005026B2 (en) * | 2002-11-15 | 2006-02-28 | Applied Medical Resources Corporation | Kink-resistant access sheath and method of making same |
US20050004515A1 (en) * | 2002-11-15 | 2005-01-06 | Hart Charles C. | Steerable kink resistant sheath |
US20050165366A1 (en) | 2004-01-28 | 2005-07-28 | Brustad John R. | Medical tubing having variable characteristics and method of making same |
GB0302752D0 (en) * | 2003-02-07 | 2003-03-12 | Rolls Royce Plc | Hose assembly |
US7493902B2 (en) | 2003-05-30 | 2009-02-24 | Fisher & Paykel Healthcare Limited | Breathing assistance apparatus |
AU2004203870B2 (en) | 2003-09-17 | 2011-03-03 | Fisher & Paykel Healthcare Limited | Breathable Respiratory Mask |
DE602005014738D1 (en) * | 2004-01-05 | 2009-07-16 | Fuji Shoji Co Ltd | DEVICE AND METHOD FOR PRODUCING A KORD REINFORCED GUMMIFLE IMAGE |
US20050247362A1 (en) * | 2004-05-07 | 2005-11-10 | Robert Harcourt | Well hose with embedded electrical conductors |
MXPA06013475A (en) * | 2004-05-27 | 2007-04-25 | Nomaco Inc | Foam welding and profile manufacturing system. |
HUE060036T2 (en) | 2004-08-20 | 2023-01-28 | Fisher & Paykel Healthcare Ltd | Apparatus for measuring properties of gases supplied to a patient |
EP1743672A1 (en) * | 2005-07-12 | 2007-01-17 | Deas S.R.L. | Flexible duct with devices for heating the conveyed stream |
WO2007019628A1 (en) | 2005-08-15 | 2007-02-22 | Resmed Ltd | Low cost cpap flow generator and humidifier assembly |
GB0521349D0 (en) * | 2005-10-20 | 2005-11-30 | Intersurgical Ltd | Improvements relating to ventilation tubes |
US7891382B2 (en) * | 2005-12-16 | 2011-02-22 | Mercury Plastics, Inc. | Overmolded and bendable position-retaining tubing |
DE202006007397U1 (en) * | 2006-05-08 | 2007-09-20 | GRÜNDLER GmbH | Ventilation hose with different heating zones |
WO2007137184A2 (en) | 2006-05-18 | 2007-11-29 | Applied Medical Resources Corporation | Method of making medical tubing having variable characteristics using thermal winding |
NZ721025A (en) | 2006-07-28 | 2018-01-26 | Resmed Ltd | Delivery of respiratory therapy |
CN110141752B (en) * | 2006-11-08 | 2022-03-04 | 瑞思迈私人有限公司 | Catheter for use in a respiratory device |
ITMI20062303A1 (en) * | 2006-11-29 | 2008-05-30 | Gmi Gestioni Mobiliari Ed Immobiliari | RIGID TUBULAR MANUFACTURE. |
FR2911381B1 (en) * | 2007-01-11 | 2010-11-05 | Axon Cable Sa | HYBRID CABLE |
EP2170092A1 (en) * | 2007-07-13 | 2010-04-07 | Conway Jr., W. Frederick | Apparatus and method for manufacturing a consumable candy drinking straw |
WO2009015410A1 (en) * | 2007-07-31 | 2009-02-05 | Resmed Ltd | Heating element, humidifier for respiratory apparatus including heating element, and respiratory apparatus |
US8563863B2 (en) * | 2007-09-25 | 2013-10-22 | Eric Carlson | Flexible tubing with improved signal transmission and method of making |
US8563864B2 (en) * | 2007-09-25 | 2013-10-22 | Eric Carlson | Flexible tubing and novel manufacturing methods for making such a tubing |
US20110168287A1 (en) * | 2007-09-25 | 2011-07-14 | Steward Plastics, Inc. | Flexible tubing with dual-level imbedded helical conductors and method of making |
KR100831077B1 (en) * | 2007-12-14 | 2008-05-22 | (주) 아모센스 | Heater for preventing freezing burst of pipe using heating element having strip type surface and fabricating method thereof |
US9802022B2 (en) | 2008-03-06 | 2017-10-31 | Resmed Limited | Humidification of respiratory gases |
US9505164B2 (en) | 2009-12-30 | 2016-11-29 | Schauenburg Technology Se | Tapered helically reinforced hose and its manufacture |
DE102008022663B4 (en) | 2008-05-07 | 2012-10-31 | Schauenburg Hose Technology Gmbh | Stretch hose |
US9308698B2 (en) | 2009-01-15 | 2016-04-12 | Schauenburg Hose Technology Gmbh | Method of hose manufacture |
US8453681B2 (en) * | 2009-01-15 | 2013-06-04 | Schouenburg Hose Technology GmbH | Flexible, stretchable, crush resistant hose well suited for medical applications |
US8153541B2 (en) * | 2008-06-17 | 2012-04-10 | Century, Inc. | Ceramic article |
US20090309252A1 (en) * | 2008-06-17 | 2009-12-17 | Century, Inc. | Method of controlling evaporation of a fluid in an article |
DE102008039137B3 (en) * | 2008-08-21 | 2010-02-11 | Dräger Medical AG & Co. KG | Ventilator with a breathing circuit |
AU2009322122A1 (en) | 2008-12-06 | 2010-06-10 | 3Ip, Pllc | Improved heat transfer between tracer and pipe |
US9365004B2 (en) | 2009-01-15 | 2016-06-14 | Schauenburg Hose Technology Gmbh | Flexible stretch hose having inwardly extending web portions connecting adjacent pairs of reinforcing coils, with hose properties enhanced by annealing |
US9964238B2 (en) | 2009-01-15 | 2018-05-08 | Globalmed, Inc. | Stretch hose and hose production method |
DE102009009790B3 (en) * | 2009-02-20 | 2010-06-17 | Schauenburg Hose Technology Gmbh | Heated tube i.e. electrically heated tube, for use as respiratory tube in medical field, has four reinforcing ribs writhing screw line around flexible tube wall, where two of four reinforcing ribs enclose heated wires for heating tube |
US20110001314A1 (en) * | 2009-07-01 | 2011-01-06 | Xerox Corporation | Security codes within scratch-off layers and method of embedding thereof |
AU2010206053B2 (en) | 2009-07-31 | 2014-08-07 | ResMed Pty Ltd | Wire Heated Tube with Temperature Control System, Tube Type Detection, and Active Over Temperature Protection for Humidifier for Respiratory Apparatus |
EP2499083B1 (en) | 2009-11-09 | 2017-01-11 | Wayne Fueling Systems Sweden AB | Fluid dispensing unit having a circulation system and a method for circulating a fluid in a fluid dispensing unit |
JP6017312B2 (en) | 2009-12-22 | 2016-10-26 | フィッシャー アンド ペイケル ヘルスケア リミテッド | Medical circuit components |
AU2011201085B2 (en) * | 2010-04-01 | 2016-08-11 | Paltech Corporation Pty Ltd | Manufacturing method for insulated flexible air ducts |
US9283734B2 (en) | 2010-05-28 | 2016-03-15 | Gunite Corporation | Manufacturing apparatus and method of forming a preform |
PL219064B1 (en) * | 2010-12-31 | 2015-03-31 | Szagru Spółka Z Ograniczoną Odpowiedzialnością | Method for the production of thermoplastic pipes |
WO2012090184A2 (en) * | 2010-12-31 | 2012-07-05 | Szagru Sp. Z O.O. | A method of manufacturing a pipe from thermoplastic material and a thermoplastic strip for manufacturing a pipe |
ES2846816T3 (en) | 2011-03-24 | 2021-07-29 | Steward Plastics | Flexible tubing with integrated helical conductors and manufacturing method |
CN102219132B (en) * | 2011-04-07 | 2012-07-18 | 江苏星辰星汽车附件有限公司 | Non-woven air filter element air inlet pipe winding machine and winding process thereof |
CN102234042B (en) * | 2011-04-07 | 2012-07-18 | 江苏星辰星汽车附件有限公司 | Nonwoven fabric air filter element air inlet pipe winding machine |
RU2657935C2 (en) | 2011-06-03 | 2018-06-18 | Фишер Энд Пейкел Хелткэа Лимитед | Medical tubes and methods for their manufacture |
CN103906547B (en) | 2011-10-27 | 2017-08-01 | 皇家飞利浦有限公司 | Collapsible patient catheter, respiratory treatment systems |
FR2984257B1 (en) * | 2011-12-19 | 2016-08-05 | Valeo Systemes Dessuyage | DEVICE FOR TRANSPORTING AND HEATING A LIQUID FOR A WIPING SYSTEM OF A GLASS OF A VEHICLE |
EP3738638A1 (en) | 2012-03-15 | 2020-11-18 | Fisher & Paykel Healthcare Limited | Respiratory gas humidification system |
WO2013156914A2 (en) * | 2012-04-17 | 2013-10-24 | Koninklijke Philips N.V. | Gas delivery conduit for a respiratory therapy system |
IN2014MN02333A (en) | 2012-04-27 | 2015-08-14 | Fisher & Paykel Healthcare Ltd | |
CN107361960B (en) | 2012-11-14 | 2020-11-06 | 费雪派克医疗保健有限公司 | Zone heating for breathing circuits |
CN116585583A (en) | 2012-12-04 | 2023-08-15 | 费雪派克医疗保健有限公司 | Medical tube and method for manufacturing the same |
NZ727820A (en) | 2013-02-01 | 2018-06-29 | Resmed Ltd | Wire heated tube with temperature control system for humidifier for respiratory apparatus |
CN103083773A (en) * | 2013-02-21 | 2013-05-08 | 东莞永胜医疗制品有限公司 | Thread heating pipe and preparation method of the same |
CN105188821B (en) | 2013-03-15 | 2020-01-07 | 费雪派克医疗保健有限公司 | Assembly for medical circuit |
US10500364B2 (en) | 2013-03-15 | 2019-12-10 | Fisher & Paykel Healthcare Limited | Drying expiratory limb with tailored temperature profile and multi-lumen configuration |
EP3043854B1 (en) | 2013-09-13 | 2019-11-06 | Fisher & Paykel Healthcare Limited | Humidification system |
CA3166029A1 (en) | 2013-09-13 | 2015-03-19 | Fisher And Paykel Healthcare Limited | Circuit connector for a humidification system |
US10814091B2 (en) | 2013-10-24 | 2020-10-27 | Fisher & Paykel Healthcare Limited | System for delivery of respiratory gases |
CA3176263A1 (en) | 2013-12-20 | 2015-06-25 | Fisher & Paykel Healthcare Limited | Humidification system connections |
US10449319B2 (en) | 2014-02-07 | 2019-10-22 | Fisher & Paykel Healthcare Limited | Respiratory humidification system |
CN106232167B (en) | 2014-03-17 | 2020-03-24 | 费雪派克医疗保健有限公司 | Medical tube for respiratory system |
US9625066B2 (en) | 2014-03-27 | 2017-04-18 | Steward Plastics, Inc. | Helically wound plastic tubing with variable profile thickness and methods of making the same |
WO2015167347A1 (en) | 2014-05-02 | 2015-11-05 | Fisher & Paykel Healthcare Limited | Gas humidification arrangement |
AU2015259944B2 (en) | 2014-05-13 | 2020-07-02 | Fisher & Paykel Healthcare Limited | Usability features for respiratory humidification system |
EP2946803B1 (en) | 2014-05-21 | 2019-07-03 | Dentsply IH AB | Reinforced urinary catheter |
EP3151894B1 (en) | 2014-06-03 | 2019-08-28 | Fisher & Paykel Healthcare Limited | Flow mixers for respiratory therapy systems |
EP3925654B1 (en) | 2014-11-17 | 2024-04-17 | Fisher & Paykel Healthcare Limited | Humidification of respiratory gases |
WO2016087977A1 (en) | 2014-12-04 | 2016-06-09 | Koninklijke Philips N.V. | Patient circuit with adjustable length |
CN104608368A (en) * | 2015-01-27 | 2015-05-13 | 东阳市沃特塑胶有限公司 | Forming die capable of automatically regulating thread pitch for medical corrugated pipe |
WO2017043981A1 (en) | 2015-09-09 | 2017-03-16 | Po-Yen Liu | Zone heating for respiratory circuits |
US10118334B2 (en) | 2016-07-14 | 2018-11-06 | Custom Wire Technologies, Inc. | Wire-reinforced tubing and method of making the same |
CN106273388A (en) * | 2016-11-01 | 2017-01-04 | 厦门腾达祥管业有限公司 | PVC composite glass steel pipe continuous-winding forming device |
CN106273384A (en) * | 2016-11-01 | 2017-01-04 | 厦门腾达祥管业有限公司 | Glass reinforced plastic pipe continuous-winding forming technique |
CN109132735A (en) * | 2016-11-26 | 2019-01-04 | 青岛极致创新科技有限公司 | A kind of tube body enhancement layer manufacturing equipment and its relevant apparatus |
EP3551978B1 (en) | 2016-12-07 | 2022-01-26 | Fisher&Paykel Healthcare Limited | Sensing arrangements for medical devices |
EP3544662A4 (en) | 2016-12-22 | 2020-07-29 | Fisher & Paykel Healthcare Limited | Medical tubes and methods of manufacture |
US11577292B2 (en) * | 2017-01-06 | 2023-02-14 | Keystone Tower Systems, Inc. | Tube stiffening |
CA3053834C (en) | 2017-01-30 | 2020-09-01 | Globalmed, Inc. | Heated respiratory hose assembly |
US11813403B2 (en) | 2017-01-30 | 2023-11-14 | Globalmed, Inc. | Heated respiratory hose wiring |
US11839719B2 (en) | 2017-01-30 | 2023-12-12 | Globalmed, Inc. | Heated respiratory hose wiring |
DE102017222199A1 (en) * | 2017-12-07 | 2019-06-13 | B/E Aerospace Systems Gmbh | Oxygen supply means |
CN108211077A (en) * | 2018-01-05 | 2018-06-29 | 绍兴安迪斯医疗科技有限公司 | A kind of hot type pipeline and its processing technology |
GB2574396A (en) * | 2018-06-01 | 2019-12-11 | Meiban Int Pte Ltd | Flexible tubing with embedded wire conductor |
US11911563B2 (en) | 2018-11-08 | 2024-02-27 | Plastiflex Group | Moisture permeable conduit for a breathing circuit |
EP3956003A4 (en) | 2019-04-17 | 2023-01-11 | ResMed Pty Ltd | Cpap system |
CN111578030B (en) * | 2020-04-16 | 2021-06-11 | 安徽益宁电子科技有限公司 | Urea heating pipe heater strip wind |
US20220113095A1 (en) * | 2020-10-08 | 2022-04-14 | Controls Southeast, Inc. | Adjustable heat transfer element |
US20220221087A1 (en) * | 2021-01-08 | 2022-07-14 | Contech Engineered Solutions LLC | Helically wound pipe and related method |
CN113263705A (en) * | 2021-05-24 | 2021-08-17 | 海宁亚大塑料管道系统有限公司 | Pipe machining device and process for prefabricating embedded integrated rubber ring and pipe |
RU210096U1 (en) * | 2021-12-30 | 2022-03-28 | Алексей Александрович Малтабар | HEATING CABLE WITH CURRENT OUTER SHEATH |
WO2023152128A1 (en) | 2022-02-09 | 2023-08-17 | Plastiflex Group | Flexible hose with embedded helical conductors and method of manufacturing same |
Family Cites Families (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US848238A (en) * | 1905-11-06 | 1907-03-26 | Edwin T Greenfield | Metallic hose. |
US837512A (en) * | 1905-11-27 | 1906-12-04 | William G Seeley | Electric hose signaling apparatus. |
US1270579A (en) * | 1914-03-09 | 1918-06-25 | Emil Witzenmann | Spiral metallic hose. |
US1179578A (en) * | 1915-10-08 | 1916-04-18 | August Sundh | Flexible pipe. |
GB223327A (en) * | 1923-07-25 | 1924-10-23 | Robert Owen King | Improvements in silencing devices for the exhaust gases of internal combustion engines |
GB448933A (en) * | 1934-12-17 | 1936-06-17 | Joseph Harry Greenwood | Improvements in and relating to armoured hose |
US2398876A (en) * | 1944-11-09 | 1946-04-23 | Plax Corp | Method of and apparatus for forming tubes of organic plastic material |
US2674297A (en) * | 1949-05-06 | 1954-04-06 | Arrowhead Rubber Co | Method of manufacturing ducts |
US2578280A (en) * | 1950-05-13 | 1951-12-11 | Bailey Meter Co | Tubing bundle or cluster |
GB683259A (en) * | 1950-07-31 | 1952-11-26 | Josef Brand | Air-pipe couplings |
US2602608A (en) * | 1950-08-09 | 1952-07-08 | Ralph E Darling | Personal equipment for aircraft pilots |
US2707491A (en) * | 1951-08-17 | 1955-05-03 | Gen Motors Corp | Flexible tubing |
US2740427A (en) * | 1952-08-09 | 1956-04-03 | Jr Alfred H Swan | Articulated hose |
US2731070A (en) * | 1952-11-20 | 1956-01-17 | William E Meissner | Method and apparatus for forming reinforced tubing |
GB799547A (en) * | 1955-10-25 | 1958-08-13 | Andrew George Heron | Improvements in electrically heated flexible hoses |
BE560655A (en) * | 1956-09-20 | |||
GB897292A (en) * | 1957-04-10 | 1962-05-23 | Isopad Ltd | Improvements in or relating to electrically heated flexible hose |
CA581780A (en) * | 1957-05-31 | 1959-08-18 | General Electric Company | Heater wire |
GB862795A (en) * | 1958-06-12 | 1961-03-15 | Bodin Girin & Cie Tissus Ind | Tubular members provided with corrugated walls and method for producing same |
FR1241167A (en) * | 1959-07-28 | 1960-09-16 | Tuyaux Flexibles Rudolph | Method and device for manufacturing flexible pipes |
GB980308A (en) * | 1960-03-03 | 1965-01-13 | Bristol Aeroplane Plastics Ltd | Improvements in resin-bonded fibre pipes |
US3070132A (en) * | 1960-04-06 | 1962-12-25 | David S Sheridan | Non-sparking medico-surgical tubes |
US3112771A (en) * | 1961-01-31 | 1963-12-03 | Richard G Bringolf | Resilient lining for light weight hose |
US3301734A (en) * | 1962-04-24 | 1967-01-31 | Continental Oil Co | Apparatus for forming flexible, thin walled plastic tubing |
US3166688A (en) * | 1962-11-14 | 1965-01-19 | Ronald P Rowand | Polytetrafluoroethylene tubing having electrically conductive properties |
US3273600A (en) * | 1963-06-10 | 1966-09-20 | Air Reduction | Flexible tube |
US3252483A (en) * | 1963-11-26 | 1966-05-24 | Air Reduction | Flexible hose |
US3290426A (en) * | 1964-01-06 | 1966-12-06 | Transpolymer Ind Inc | Plastic pipe having a conductive exterior surface and method of making the same |
US3275803A (en) * | 1964-02-06 | 1966-09-27 | Cecil W True | Pipe heating apparatus |
US3378673A (en) * | 1965-10-18 | 1968-04-16 | Thomas O. Hopper | Electrically heated hose assembly |
US3494812A (en) * | 1968-06-17 | 1970-02-10 | Reynolds Metals Co | Method and apparatus for making a container having a seamless sleevelike liner |
US3706624A (en) * | 1969-01-21 | 1972-12-19 | Goodrich Co B F | Apparatus for making plastic hose |
JPS5114945Y1 (en) * | 1969-02-04 | 1976-04-20 | ||
US3645834A (en) * | 1969-03-24 | 1972-02-29 | Goodyear Tire & Rubber | Reinforced fluorocarbon polyamide containers |
US3674056A (en) * | 1970-03-20 | 1972-07-04 | Wiremold Co | Scuff strip for tow-element helically wound tubing |
US3919026A (en) * | 1970-10-27 | 1975-11-11 | Kuraray Plastics Company Limit | Flexible hose manufacturing process |
US3739815A (en) * | 1971-04-30 | 1973-06-19 | Wiremold Co | Flexible collapsible tubing |
US4120628A (en) * | 1971-05-05 | 1978-10-17 | General Enterprises Corp., Ltd. | Apparatus for manufacturing plastic tubes from plastics of dissimilar properties |
DE2221727C3 (en) * | 1972-05-04 | 1978-08-24 | Dynamit Nobel Ag, 5210 Troisdorf | Device for calibrating a winding tube made of thermoplastic material |
US3834423A (en) * | 1972-05-30 | 1974-09-10 | Acme Hamilton Mfg Corp | Contractile-extensible conduit and method of making same |
US3910713A (en) * | 1972-06-13 | 1975-10-07 | Ernest J Maroschak | Method for making corrugated plastic tubing |
DE2308418B2 (en) * | 1972-06-21 | 1976-04-08 | Petzetakis, Aristovoulos George, Moschaton, Piräus (Griechenland) | METHOD AND DEVICE FOR MANUFACTURING AN IN PARTICULAR LARGE-CALIBRATED TUBE FROM THERMOPLASTIC PLASTIC |
US3910808A (en) * | 1972-08-30 | 1975-10-07 | Steward Plastics | Apparatus for making helically wound plastic tubing |
GB1448474A (en) * | 1972-09-13 | 1976-09-08 | Grant G C | Humidification tank assembly for a medical humidifier |
USRE29332E (en) * | 1973-06-15 | 1977-08-02 | Thermon Manufacturing Company | Pipe heat transfer assembly and method of making same |
US3857159A (en) * | 1973-09-27 | 1974-12-31 | Pacific Roller Die Co Inc | Pipe forming method |
NL7414546A (en) * | 1973-11-15 | 1975-05-20 | Rhone Poulenc Sa | SMOOTH HEATING TUBE AND PROCESS FOR MANUFACTURING IT. |
US3914146A (en) * | 1974-02-19 | 1975-10-21 | Rilsan Corp | Polyester hose and preparation thereof |
FR69963E (en) * | 1974-03-22 | 1959-01-30 | Onera (Off Nat Aerospatiale) | Apparatus for counting records |
US3963856A (en) * | 1974-11-25 | 1976-06-15 | Steward Plastics, Inc. | Flexible, corrugated, plastic tubing having conductive helical bead |
US4166000A (en) * | 1974-11-27 | 1979-08-28 | Dunlop Limited | Apparatus for winding helical reinforcement into a polymeric tube |
US3962019A (en) * | 1975-06-16 | 1976-06-08 | The Wiremold Company | Floating mandrel duct making apparatus |
US4118453A (en) * | 1976-08-30 | 1978-10-03 | Mobil Oil Corporation | Method and apparatus for the extrusion of tubular thermoplastic film |
CA1092764A (en) * | 1977-09-13 | 1981-01-06 | Gerd P.H. Lupke | Apparatus for and method of producing corrugated thermoplastic tubing |
DE2740717C3 (en) * | 1977-10-07 | 1981-01-15 | Jurij F. Dunitschev | Method for producing a corrugated pipe from polytetrafluoroethylene |
US4203476A (en) * | 1979-01-05 | 1980-05-20 | Dayco Corporation | Wire reinforced hose |
US4294636A (en) * | 1980-07-10 | 1981-10-13 | Dayco Corporation | Method and apparatus for making wire reinforced hose |
US4553023A (en) * | 1981-11-27 | 1985-11-12 | Nordson Corporation | Thermally insulated electrically heated hose for transmitting hot liquids |
GB2173274B (en) * | 1985-04-04 | 1989-02-01 | Boc Group Plc | Improvements in inhalation apparatus |
DE8619074U1 (en) * | 1986-07-16 | 1986-11-27 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
DE4244493A1 (en) * | 1992-01-18 | 1993-07-22 | Eilentropp Hew Kabel |
-
1994
- 1994-05-27 US US08/250,173 patent/US5454061A/en not_active Expired - Lifetime
-
1995
- 1995-05-01 AU AU24305/95A patent/AU679377B2/en not_active Expired
- 1995-05-01 WO PCT/US1995/005357 patent/WO1995033163A1/en active IP Right Grant
- 1995-05-01 EP EP95918336A patent/EP0760925B1/en not_active Expired - Lifetime
- 1995-05-01 DE DE69527528T patent/DE69527528T2/en not_active Expired - Lifetime
- 1995-05-01 CA CA002191328A patent/CA2191328C/en not_active Expired - Lifetime
- 1995-07-26 US US08/507,732 patent/US5637168A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU2430595A (en) | 1995-12-21 |
CA2191328A1 (en) | 1995-12-07 |
WO1995033163A1 (en) | 1995-12-07 |
US5637168A (en) | 1997-06-10 |
US5454061A (en) | 1995-09-26 |
EP0760925A4 (en) | 1998-09-09 |
EP0760925A1 (en) | 1997-03-12 |
EP0760925B1 (en) | 2002-07-24 |
DE69527528T2 (en) | 2003-04-30 |
DE69527528D1 (en) | 2002-08-29 |
AU679377B2 (en) | 1997-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2191328C (en) | Apparatus and method for making flexible tubing with helically wound heating conductor | |
US6190480B1 (en) | Method of making a double-walled flexible tubing product with helical support bead and heating conductor | |
US6367510B1 (en) | Tubing product having a helical support bead with lumen and method | |
US7965930B2 (en) | Flexible tubing with imbedded helical conductors and method of making | |
US20210016043A1 (en) | Conduit and method of forming | |
EP0080811B1 (en) | Electrically heated insulated hose | |
US5640951A (en) | Humidifier conduit | |
EP1535722B1 (en) | Conduit and method of forming | |
EP1545863B1 (en) | Conduits and method of forming | |
CN103857434A (en) | Improved medical tubing | |
FI102636B (en) | Method for connecting plastic pipes, intermediate ring for use in the process and plastic pipe connection | |
US5910266A (en) | Helical electrical heater | |
NZ285260A (en) | Thin-walled flexible plastic tubing with helically bonded bead and electrical resistance conductor, for medical use, and associated forming apparatus | |
WO2023152128A1 (en) | Flexible hose with embedded helical conductors and method of manufacturing same | |
AU2007214364B2 (en) | Conduit and Method of Forming | |
CA2624182C (en) | Conduit and method of forming |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150501 |