US3833166A - Valve bag - Google Patents
Valve bag Download PDFInfo
- Publication number
- US3833166A US3833166A US00326546A US32654673A US3833166A US 3833166 A US3833166 A US 3833166A US 00326546 A US00326546 A US 00326546A US 32654673 A US32654673 A US 32654673A US 3833166 A US3833166 A US 3833166A
- Authority
- US
- United States
- Prior art keywords
- bag
- panel
- ply
- plies
- panels
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/14—Valve bags, i.e. with valves for filling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S383/00—Flexible bags
- Y10S383/903—Stress relief
Definitions
- a suitable valved bag can be provided by forming the valve between separate panels of the front wall of the bag, and can be very easily manufactured by means of automatic bag making equipment.
- a plastics valved bag of the type comprising a back wall and a front wall joined together around the entire periphery of the bag, the front wall consisting of a first panel and a second panel, of greater combined width than the width of the back wall, said first panel at least partially overlapping said second panel throughout the length of the bag and said panels in their common area being joined together along a line substantially parallel with and at a distance from one end of the bag, thus forming a tubular selfclosing filling sleeve extending transversely of the bag adjacent to said one end thereof, with said second panel forming the inner wall of said filling sleeve, and being also joined together along at least one line extending from said first-mentioned line substantially to the opposite end of the bag, is characterized in that said second panel consists of at least two plies that are noncoextensive with each other so that at least the end portion of the inner wall of said filling sleeve is formed of a number of plies that is
- the back wall and the two panels of the front wall all have the same number of plies, and in such case the front panels are preferably integral with the back panel, being joined to it by folds.
- a particularly preferred form of the bag has two plies in the back wall and in the front panels; such a bag may be made very conveniently from flattened tubular film.
- the edge of the first front panel is preferably constituted by a fold joining the plies. This may be one of the side folds of the tubular film, which may then be slit along the other fold, or, more usually, along a line close to and parallel therewith, to provide the separate plies, coextensive or non-coextensive, of the second front panel.
- FIG. 1 is an elevational view of the first embodiment of the bag
- FIG. 2 is a sectional view along line lI-II of FIG. *1;
- FIG. 3 is an elevational view of the second and preferred embodiment of the bag.
- FIG. 4 is a sectional view along line II-ll of FIG. 3.
- FIGS. 1 and 2 is shown a generally rectangular pillow-type bag, .10, having a single-ply back wall 11 and a front wall made of first and second partially overlapping panels 12 and 13.
- the first panel 12 is single-ply while the second panel 13 has two plies 1'6 and 17.
- Panel 12 and outer ply 17 of panel 13 are integral with back wall 11 and thus form with the back wall a flattened single-ply tube, which is closed at both'ends by transverse seals 14 and 15.
- Panel 13 lies beneath panel 12 in the area of overlap, and the free edge of its inner ply 16 which is a strip of film extending the whole length of the bag and being somewhat wider than ply 17, projects somewhat beyond the free edge of outer ply 17.
- a seal 18 unites both plies of panel 13 with panel 12, and a seal 19 unites the projecting end ofjply 16 of panel 13 with panel 12.
- the portion left unsealed in the common area of overlap at the top. end of the bag constitutes a tubular valve sleeve suitable for insertion of a filling spout.
- the top ends of seals 18 and 19, together with dot seals 20 delineate the tubular valve sleeve.
- FIGS. 3 and 4 is again shown a generally rectangular pillow-type bag, 10, having a two-ply back wall 21 and a front wall made of two-ply partially overlapping panels, the said first panel being shown at22 and the second at 13.
- Panels 22 and 13 are integral with back wall 21 and thus form with the back wall a flattened two-ply tube, which is closed at both ends by transverse seals 14 and 15.
- Panel 13 lies beneath panel 22 in the area of overlap, and the free edge of its inner ply 16 projects somewhat beyond the free edge of its outer ply 17.
- a seal, 18, unites both plies of panel 13 with the two plies of panel 22, and a seal, 19, unites theprojecting end of ply 16 of panel 13 with the two plies of panel 22.
- the portion-left unsealed in the common area of overlap at the top end of the bag constitutes a tubular valve sleeve, suitable for insertion of a filling spout.
- the end of the valve sleeve is shown as being formed out of a projecting portion of the inner ply 16 of panel 13,.it should be understood that it can alternatively be formed by a portion of outer ply 17 projecting beyond the edge of innerply 16. In other words, either one of plies l6 and 17 can project beyond the edge of the other to form the valve closing flap.
- Dot seals 20 may be replaced by a continuous seal extending substantially parallel to transverse seal 14 from the top end of seal 18 to the inward edge of ply 16.
- valve opening of each bag is shown as being located close to one side of the bag, it should be understood that it can be located anywhere adjacent to the end seal 14 of the bag, provided that sufficient space is left between its inner mouth and the side of the bag facing it to allow insertion of a reasonably long filling spout and free delivery of filling material therefrom.
- the front panels it is preferred to arrange the front panels so that the valve opening is located within one vertical half of the bag, with the valve sleeve extending into or towards the other vertical half.
- the width of the wider front panel will not significantly exceed, and preferably is less than, the width of the back wall.
- the longitudinal seals between the front panels, shown at 18 and.19 in FIGS. 1 and 3, stop short of and thus do not intersect transverse seal at the bottom of the bag. Such intersection might result in weakening of the end seal at the points of intersection, and thus in weakening of the bottom of the bag.
- the bags are preferably made from plastics tubular film of appropriate width.
- the plastics film is readily heat-sealable, or is provided with a heatsealable coating.
- Films of olefine polymer or copolymer, or of polyvinyl chloride, are very suitable.
- Film of lowdensity polyethylene is particularly suitable because of its inherent heat-sealability, its toughness, and its low cost.
- the bags illustrated in FIGS. 2 and 3 may each be made by continuously feeding a flattened tubing to a bag making machine, where one wall of the tubing is slit longitudinally close to one fold and that fold is thereafter unfolded.
- a longitudinally folded web results, having one ply somewhat wider than the other; such a web may of course, alternatively be formed by longitudinally folding a length of single sheet of the film.
- the web is then passed over a suitable A-frame where it is folded longitudinally to form a double-ply tubing adapted to form the back wall and the overlapping front panels of the bags.
- the common area between the front panels is provided at regular longitudinal intervals with the required longitudinal and transverse seals to join them together and provide the valve sleeves of successive bags.
- the double-ply tubing is finally transversely sealed and cut at regular intervals to provide bags as shown in the drawings.
- the bags may of course alternatively be made by longitudinally sealing separate sheets to provide the back wall and front panels of the bag, or any part or parts thereof, and to form the tubular web from which successive bags may be sealed and severed.
- a web of proper width is continuously fed to a bag making machine where it is folded longitudinally to provide the back wall 11 and overlapping panel 12 and outer ply 17 of panel 13.
- a single-ply tubing is so formed into which is also continuously feda strip of film which forms inner ply 16 of panel 13. The formation of the bag is then as hereinbefore defined for the double-ply bags.
- the invention has been described in connection with bags where only second panel 13 is double ply or where the back wall and first and second panels of the front wall comprise a similar number of plies. It is within the scope of this invention, however, to provide bags wherein at least one of the back wall and two panels making the front wall comprises'an individual additional ply. In such bags the additional ply is united to the other ply or plies of the bag only by top and bottom seals 14 and 15. Where, however, said additional ply is part of one or both panels of the front wall, it can be united to the other plies of said panels in the common area of overlap such as along seals 18, 19 and 20.
- Bags comprising an additional ply as above described can be fabricated by simple adaptation of the method outlined hereinabove for making bags such as illustrated in FIGS. 1 to 4.v
- the innermost ply is formed of film of highdensity polyethylene
- the outer ply is formed of lowdensity polyethylene
- the inner ply then allows the bag to be filled with material at a temperature considerably higher than could be tolerated by a double-walled bag of low-density polyethylene film, but the outer ply, supported by the inner ply while hot, provides on cooling a wall of higher strength than would be the case with a double-walled bag of high-density polyethylene film.
- Other combinations of films may be selected to provide characteristics suited to particular applications.
- the inner ply may be, for example, of a plastics material more flexible than that used for the remaining construction of the bag.
- a plastics valved bag of the type comprising a back wall and a front wall joined together around the entire periphery of the bag, the front wall consisting of a first panel and a second panel, of greater combined width than the width of the back wall, said first panel at least partially overlapping said second panel throughout the length of the bag and said panels in their common area being joined together along a line substantially parallel with and at a distance from one end of the bag, thus forming a tubular self-closing filling sleeve having inner and outer walls and extending transversely of the bag adjacent to said one end thereof, with said first panel forming the outer wall and said second panel forming the inner wall of said filling sleeve, and being also joined together along at least one line extending from said first-mentioned line substantially to the opposite end of the bag, characterized in that said second panel consists of at least two plies that are non-coextensive with each other so that at least the inner end portion of the inner wallof said filling sleeve is
- a bag as claimed in claim 1 made of low-density polyethylene film.
- a bag as claimed in claim 1 in which said first panel is in contact with the outermost ply of said second panel in the common area of the panels, and one ply of the second panel extends beyond the edge of the other plies thereof.
- a bag as claimed in claim 2 in which the innermost ply of said first panel is in contact with the outermost ply of said second panel in the common area of the panels, and one ply of the second panel extends beyond the edge of the other plies thereof.
Abstract
Description
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA108,630A CA984346A (en) | 1971-03-24 | 1971-03-24 | Valve bag |
Publications (1)
Publication Number | Publication Date |
---|---|
US3833166A true US3833166A (en) | 1974-09-03 |
Family
ID=4089156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00326546A Expired - Lifetime US3833166A (en) | 1971-03-24 | 1973-01-24 | Valve bag |
Country Status (4)
Country | Link |
---|---|
US (1) | US3833166A (en) |
BR (1) | BR7201735D0 (en) |
CA (1) | CA984346A (en) |
ZA (1) | ZA721847B (en) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3937395A (en) * | 1973-07-30 | 1976-02-10 | British Visqueen Limited | Vented bags |
US4073429A (en) * | 1975-07-03 | 1978-02-14 | Imperial Chemical Industries Limited | Plastics bag |
US4093114A (en) * | 1975-07-03 | 1978-06-06 | Imperial Chemical Industries Limited | Plastics bag |
US4449243A (en) * | 1981-09-10 | 1984-05-15 | Cafes Collet | Vacuum package bag |
DE3312925A1 (en) * | 1983-02-14 | 1984-08-16 | Windmöller & Hölscher, 4540 Lengerich | VALVE BAG |
US4470152A (en) * | 1982-06-14 | 1984-09-04 | Basic Packaging Systems, Inc. | Valve bag with alignment means |
US4560598A (en) * | 1982-05-20 | 1985-12-24 | Stiksack Sts S.A. | Plastics film and bags and sacks therefrom |
US4566131A (en) * | 1983-06-30 | 1986-01-21 | Windmoller & Holscher | Valved bag |
US4576844A (en) * | 1983-11-28 | 1986-03-18 | C-I-L Inc. | Shipping bag |
EP0184362A2 (en) * | 1984-11-30 | 1986-06-11 | At Plastics Inc. | Thermoplastic sack |
US4672684A (en) * | 1983-10-06 | 1987-06-09 | C I L, Inc. | Thermoplastic bag |
US6149304A (en) * | 1997-05-09 | 2000-11-21 | The Procter & Gamble Company | Flexible storage bag with selectively-activatible closure |
US7022058B2 (en) | 2001-02-21 | 2006-04-04 | Tilia International, Inc. | Method for preparing air channel-equipped film for use in vacuum package |
US7087130B2 (en) | 2003-03-05 | 2006-08-08 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging |
US7138025B2 (en) | 2003-03-05 | 2006-11-21 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging |
US7220053B2 (en) | 2003-12-16 | 2007-05-22 | Sunbeam Products, Inc. | Flexible composite bag for vacuum sealing |
US7517484B2 (en) | 2003-03-24 | 2009-04-14 | Sunbeam Products, Inc. | Forming evacuation channels during single and multi-layer extrusion process |
US7534039B2 (en) | 2004-07-22 | 2009-05-19 | Sunbeam Products, Inc. | Vacuum packaging films patterned with protruding cavernous structures |
US20090226573A1 (en) * | 2008-03-07 | 2009-09-10 | Alejandro Gonzalez Leon | Package for granular compositions |
US7625459B2 (en) | 2003-03-05 | 2009-12-01 | Sunbeam Products, Inc. | Method for manufacturing liquid-trapping bag for use in vacuum packaging |
US7784160B2 (en) | 2007-03-16 | 2010-08-31 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7857515B2 (en) | 2007-06-15 | 2010-12-28 | S.C. Johnson Home Storage, Inc. | Airtight closure mechanism for a reclosable pouch |
US7874731B2 (en) | 2007-06-15 | 2011-01-25 | S.C. Johnson Home Storage, Inc. | Valve for a recloseable container |
US7886412B2 (en) | 2007-03-16 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
US8066433B2 (en) | 2008-03-14 | 2011-11-29 | Pro-Mart Industries, Inc. | Valve for vacuum storage bag |
USD1010258S1 (en) * | 2020-07-09 | 2024-01-02 | Taicheng Tian | Vacuum compression bag |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800269A (en) * | 1954-03-09 | 1957-07-23 | Milprint Inc | Valved bag |
US3221789A (en) * | 1963-07-05 | 1965-12-07 | St Regis Paper Co | Plastic valve bag |
US3394871A (en) * | 1966-11-25 | 1968-07-30 | Bemis Co Inc | Bags |
US3595467A (en) * | 1968-01-23 | 1971-07-27 | Luigi Goglio | Flexible sealed container provided with a one-way safety valve |
US3746246A (en) * | 1971-12-22 | 1973-07-17 | Canadian Ind | Valve bag |
-
1971
- 1971-03-24 CA CA108,630A patent/CA984346A/en not_active Expired
-
1972
- 1972-03-17 ZA ZA721847A patent/ZA721847B/en unknown
- 1972-03-24 BR BR721735A patent/BR7201735D0/en unknown
-
1973
- 1973-01-24 US US00326546A patent/US3833166A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800269A (en) * | 1954-03-09 | 1957-07-23 | Milprint Inc | Valved bag |
US3221789A (en) * | 1963-07-05 | 1965-12-07 | St Regis Paper Co | Plastic valve bag |
US3394871A (en) * | 1966-11-25 | 1968-07-30 | Bemis Co Inc | Bags |
US3595467A (en) * | 1968-01-23 | 1971-07-27 | Luigi Goglio | Flexible sealed container provided with a one-way safety valve |
US3746246A (en) * | 1971-12-22 | 1973-07-17 | Canadian Ind | Valve bag |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3937395A (en) * | 1973-07-30 | 1976-02-10 | British Visqueen Limited | Vented bags |
US4073429A (en) * | 1975-07-03 | 1978-02-14 | Imperial Chemical Industries Limited | Plastics bag |
US4093114A (en) * | 1975-07-03 | 1978-06-06 | Imperial Chemical Industries Limited | Plastics bag |
US4449243A (en) * | 1981-09-10 | 1984-05-15 | Cafes Collet | Vacuum package bag |
US4560598A (en) * | 1982-05-20 | 1985-12-24 | Stiksack Sts S.A. | Plastics film and bags and sacks therefrom |
US4470152A (en) * | 1982-06-14 | 1984-09-04 | Basic Packaging Systems, Inc. | Valve bag with alignment means |
DE3312925A1 (en) * | 1983-02-14 | 1984-08-16 | Windmöller & Hölscher, 4540 Lengerich | VALVE BAG |
US4524460A (en) * | 1983-02-14 | 1985-06-18 | Windmoller & Holscher | Valved sack |
US4566131A (en) * | 1983-06-30 | 1986-01-21 | Windmoller & Holscher | Valved bag |
US4672684A (en) * | 1983-10-06 | 1987-06-09 | C I L, Inc. | Thermoplastic bag |
US4576844A (en) * | 1983-11-28 | 1986-03-18 | C-I-L Inc. | Shipping bag |
US4681781A (en) * | 1983-11-28 | 1987-07-21 | C-I-L Inc. | Shipping bag |
EP0184362A2 (en) * | 1984-11-30 | 1986-06-11 | At Plastics Inc. | Thermoplastic sack |
EP0184362A3 (en) * | 1984-11-30 | 1988-06-08 | C-I-L Inc. | Thermoplastic sack |
US6149304A (en) * | 1997-05-09 | 2000-11-21 | The Procter & Gamble Company | Flexible storage bag with selectively-activatible closure |
US7022058B2 (en) | 2001-02-21 | 2006-04-04 | Tilia International, Inc. | Method for preparing air channel-equipped film for use in vacuum package |
US7087130B2 (en) | 2003-03-05 | 2006-08-08 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging |
US7625459B2 (en) | 2003-03-05 | 2009-12-01 | Sunbeam Products, Inc. | Method for manufacturing liquid-trapping bag for use in vacuum packaging |
US7138025B2 (en) | 2003-03-05 | 2006-11-21 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging |
US7517484B2 (en) | 2003-03-24 | 2009-04-14 | Sunbeam Products, Inc. | Forming evacuation channels during single and multi-layer extrusion process |
US7220053B2 (en) | 2003-12-16 | 2007-05-22 | Sunbeam Products, Inc. | Flexible composite bag for vacuum sealing |
US7534039B2 (en) | 2004-07-22 | 2009-05-19 | Sunbeam Products, Inc. | Vacuum packaging films patterned with protruding cavernous structures |
US7886412B2 (en) | 2007-03-16 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Pouch and airtight resealable closure mechanism therefor |
US8827556B2 (en) | 2007-03-16 | 2014-09-09 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7784160B2 (en) | 2007-03-16 | 2010-08-31 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US8176604B2 (en) | 2007-03-16 | 2012-05-15 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
US7874731B2 (en) | 2007-06-15 | 2011-01-25 | S.C. Johnson Home Storage, Inc. | Valve for a recloseable container |
US7857515B2 (en) | 2007-06-15 | 2010-12-28 | S.C. Johnson Home Storage, Inc. | Airtight closure mechanism for a reclosable pouch |
US8231273B2 (en) | 2007-06-15 | 2012-07-31 | S.C. Johnson & Son, Inc. | Flow channel profile and a complementary groove for a pouch |
US20090226573A1 (en) * | 2008-03-07 | 2009-09-10 | Alejandro Gonzalez Leon | Package for granular compositions |
US8066433B2 (en) | 2008-03-14 | 2011-11-29 | Pro-Mart Industries, Inc. | Valve for vacuum storage bag |
USD1010258S1 (en) * | 2020-07-09 | 2024-01-02 | Taicheng Tian | Vacuum compression bag |
Also Published As
Publication number | Publication date |
---|---|
BR7201735D0 (en) | 1973-05-17 |
ZA721847B (en) | 1972-12-27 |
AU3914472A (en) | 1973-08-23 |
CA984346A (en) | 1976-02-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: C-I-L- INC., Free format text: CHANGE OF NAME;ASSIGNOR:CANADIAN INDUSTRIES LIMITED;REEL/FRAME:005026/0319 Effective date: 19790926 |
|
AS | Assignment |
Owner name: AT PLASTICS INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:C-I-L INC.;REEL/FRAME:005156/0012 Effective date: 19890615 Owner name: NATIONAL TRUST COMPANY AS TRUSTEES Free format text: MORTGAGE;ASSIGNOR:AT PLASTICS INC.;REEL/FRAME:005156/0016 Effective date: 19890616 |
|
AS | Assignment |
Owner name: NATIONAL TRUST COMPANY A TRUST COMPANY OF ONTARIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AT PLASTICS INC., A CORPORATION OF ONTARIO;REEL/FRAME:005822/0255 Effective date: 19901004 |