CA1078910A - Ink-jet printers - Google Patents
Ink-jet printersInfo
- Publication number
- CA1078910A CA1078910A CA256,907A CA256907A CA1078910A CA 1078910 A CA1078910 A CA 1078910A CA 256907 A CA256907 A CA 256907A CA 1078910 A CA1078910 A CA 1078910A
- Authority
- CA
- Canada
- Prior art keywords
- ink
- air
- printer
- printing
- distributing device
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/19—Ink jet characterised by ink handling for removing air bubbles
Abstract
ABSTRACT OF THE DISCLOSURE
There is provided an air-ventilating device for use in ink-jet printers. Ink is supplied from a reservoir to a plurality of printing jets, each of which communicates with an ink-distributing device. The device has the form of a riser and communicates at substantially its highest point with a ventilating passage of such diameter as to pro-vide a capillary effect. The passage conveniently communicates with an ink-collecting chamber, which in turn communicates with a drain.
Such an air-ventilating device enables air to bled from the system with the minimum of effort and with the absence of moving, auxiliary mechanical devices.
There is provided an air-ventilating device for use in ink-jet printers. Ink is supplied from a reservoir to a plurality of printing jets, each of which communicates with an ink-distributing device. The device has the form of a riser and communicates at substantially its highest point with a ventilating passage of such diameter as to pro-vide a capillary effect. The passage conveniently communicates with an ink-collecting chamber, which in turn communicates with a drain.
Such an air-ventilating device enables air to bled from the system with the minimum of effort and with the absence of moving, auxiliary mechanical devices.
Description
T~e present invention relates to ink-jet printers and more particularly to mosaic printersof the kind having a pluarlity of pie-zoelectrically operated printing jets, each of which is supplied with printing ink through a distributing device from a printing-ink reser-voir.
In operation, each individual printlng jet is energised through a character generator by a voltage pulse, so that the piezoelectric drive element is caused to contract. The resultant pressure wave dr-ive~ an ink droplet~out of the jet orifice and the ink droplet direc-tly strikes a data carrier arranged opposite the printer head.
To enable the printing operation to be conducted in a trouble-free manner, it is necessary to prevent fluctuations in the compress-ibility of the liquid contained in the printing jet, as a consequen-ce of air entrained in the liquid. These entrained gas bubbles lead to the breakdown of the printing jet. For this reason, an air-bleed ... . . . . . . .
- device must be provided in the ink supply system.
From German Patent Specification No. 2 262 106, there is known an ink supply system for an ink jet printer, in which, between the ink reservoir and the individual printing jets, there is arranged a distributor which also serves as a reservoir and consists of a me-tal cylinder provided at its top with a plug which can be unscrewed and which is sealed by means of a sealing ring. Air bubbles entra-ined in the printing liquid collect in the distributor and form a cushion of air beneath the plug. The distributor can be bled sele-ctively by partially unscrewing the plug.
Such a vent~ating system is unsatisfactory, however, since the task of unscrewing the plug is time consuming and the operator is li-kely to be dirtied with ink.
.:- ~: . .. ..
- : ;. ` . ~ ;.~ .,, . :
` iO78910 A~ object of the present invention is to provide an air-venti-lating device for the ink supply system of an ink-jet printer, by means of which it is possible to remove air collecting in the ink supply system in simpler and more expedlent manner than was previou-sly the case.
Accordingly this invention consists in an ink-jet printer hav-.. ..
ing a printing-ink supply system and comprising a printer head havi-ng arranged therein a plurality of printing jets each of which is -connected to an ink-distributing device, and further comprising an ink-reservoir connected to the ink-distributing device and means for placing the ink in the reservoir under pressure, wherein the ink-di-stributing device is arranged to communicate with the ambient air through an air-vent~ating passage of such diameter as to provide a capillary effect.
The air-ventilating device is preferably arranged in the prin-ter head, in the neighbourhood of the highest point of the ink-supp-ly system.
One advantage afforded by the invention is that it obviates the need of mechanically moving parts such as float valves and scre-2Q wed plugs. Air collected in the ink-supply system is removed there-from simply by applying pressure to the reservoir, which causes the level of the ink in the system to rise, thus forcing air through to the air ventilating passage, upon completion of an air-ventilating operation, the air-ventilating passage will close automatically. In so doing, the column of liquid retained in the passage by cap~illary action will prevent ambient air from penetrating the ink supply sys-tem and will also prevent ink from flowing back out of the distribu-tor into the reservoir located beneath the distributor.
Conveniently, the air-ventilating passage remote from the ink ' . ~ . , ' :, ` 1078~10 ink distributor is enlarged to form a collecting chamber, which may be arranged in communication with a drain to the surroundings. Sur-plus ink passing through the air-ventilating passage will collect in the collecting chamber, whilst ink in excess of the volume of said chamber will pass to the surroundings through the drain. The air-ventilating passage, the chamber and the drain preferably extend fr-om the printer head in the same direction as the printing jets.
An exemplary embodiment of the invention will now be described with reference to the accompanying diagrammatic drawing, in which :-Figure 1 shows diagrammatically an air-ventilating device in accordance with the invention; and Figure 2 shows diagrammatically an ink-operated mosaic print-- er head in which there is arranged such air-ventilating device.
The ink supply device shown in Figure 1 ~mprices a reservoir bottle 1 which communicates through a line 2 with a printer head 3, shown in chain lines. The printer head has arranged therein a plur~
ality of piezoelectric jets 4 arranged at the pitch interval of the mosaic grid, by means of which jets droplets of ink are ejected in accordance with the character being printed and in the rhythm of op-eration of a character generator (not shown) upstream of the printi-ng jets is a distributor 5 which is adapted to supply the individual jets with ink. The distributor 5 comprises a riser pipe into which all the printing jets 4 open out. Arranged in the neighbourhood of the highest point of the ink supply device (in the illustrated case at the top end of the distributor 5) is an air-ventilating device which comprises a narrow passage or tube 6, the diameter of which is such as to provide a capillary effect. The passage or tube 6 links the ink supply system with the surrounding atmosphere and the end of the passage 6 remote from the distributor 5 has or communicates with : :, : : , . .; :: :: :. :: .: -: .
1078~10 an enlargement 7, designed to receive printing ink.
Air which may have collected in the distributor 5 for example, can be readily removed therefrom prior to setting the ink-operated mosaic printer unit into operation, by placing the ink in the system under pressure, using the manually operated pump 11 for the purpose.
The pump acts upon the ink bladder 9 housed in the reservoir 1, the-reby increasing the pressure in the ink system. Consequently, the level of the liquid in the riser pipe 5 will increase and the liquid will gradually fill the printing jets 4. When the printing jets are full, air will escape through the tubes 6, with the exception of an air bubble, shown at 10, which serves to dampen hydraulic vibrations.
When the liquid reaches the tubes or passages 6, the printing liquid will enter the passages or tubes and close them off-with respect to the amblent air. As the pressure is maintained~ the ink penetrates through the tubes or passages 6 and collects in the enlargement 7.
~nce this is full surplus ink will drain off through the drain pass-age 8.
In order to remove any air which collects in the riser pipe du-ring operation of the printing system, in a similar fashion the liq-uid-level in the riser pipe 5 is increased by means of the hand-ope-rated pump 8, so that the air is expelled through the passages or tu-bes 6 until the liquid closes the tubes or passages off. In this connection,should the air-ventilation operation be broken off prema-turely before the rising level of liquid has reached the tubes or pa-ssages 6, then the ink contained in the enlargement 7 will run back into said tubes or passages and closes them off from the ambient sur-roundings. This prevents the distributor arrangement 5 from running empty.
~,, .
.. . .. ,. ~
, . - , . -. ...
In operation, each individual printlng jet is energised through a character generator by a voltage pulse, so that the piezoelectric drive element is caused to contract. The resultant pressure wave dr-ive~ an ink droplet~out of the jet orifice and the ink droplet direc-tly strikes a data carrier arranged opposite the printer head.
To enable the printing operation to be conducted in a trouble-free manner, it is necessary to prevent fluctuations in the compress-ibility of the liquid contained in the printing jet, as a consequen-ce of air entrained in the liquid. These entrained gas bubbles lead to the breakdown of the printing jet. For this reason, an air-bleed ... . . . . . . .
- device must be provided in the ink supply system.
From German Patent Specification No. 2 262 106, there is known an ink supply system for an ink jet printer, in which, between the ink reservoir and the individual printing jets, there is arranged a distributor which also serves as a reservoir and consists of a me-tal cylinder provided at its top with a plug which can be unscrewed and which is sealed by means of a sealing ring. Air bubbles entra-ined in the printing liquid collect in the distributor and form a cushion of air beneath the plug. The distributor can be bled sele-ctively by partially unscrewing the plug.
Such a vent~ating system is unsatisfactory, however, since the task of unscrewing the plug is time consuming and the operator is li-kely to be dirtied with ink.
.:- ~: . .. ..
- : ;. ` . ~ ;.~ .,, . :
` iO78910 A~ object of the present invention is to provide an air-venti-lating device for the ink supply system of an ink-jet printer, by means of which it is possible to remove air collecting in the ink supply system in simpler and more expedlent manner than was previou-sly the case.
Accordingly this invention consists in an ink-jet printer hav-.. ..
ing a printing-ink supply system and comprising a printer head havi-ng arranged therein a plurality of printing jets each of which is -connected to an ink-distributing device, and further comprising an ink-reservoir connected to the ink-distributing device and means for placing the ink in the reservoir under pressure, wherein the ink-di-stributing device is arranged to communicate with the ambient air through an air-vent~ating passage of such diameter as to provide a capillary effect.
The air-ventilating device is preferably arranged in the prin-ter head, in the neighbourhood of the highest point of the ink-supp-ly system.
One advantage afforded by the invention is that it obviates the need of mechanically moving parts such as float valves and scre-2Q wed plugs. Air collected in the ink-supply system is removed there-from simply by applying pressure to the reservoir, which causes the level of the ink in the system to rise, thus forcing air through to the air ventilating passage, upon completion of an air-ventilating operation, the air-ventilating passage will close automatically. In so doing, the column of liquid retained in the passage by cap~illary action will prevent ambient air from penetrating the ink supply sys-tem and will also prevent ink from flowing back out of the distribu-tor into the reservoir located beneath the distributor.
Conveniently, the air-ventilating passage remote from the ink ' . ~ . , ' :, ` 1078~10 ink distributor is enlarged to form a collecting chamber, which may be arranged in communication with a drain to the surroundings. Sur-plus ink passing through the air-ventilating passage will collect in the collecting chamber, whilst ink in excess of the volume of said chamber will pass to the surroundings through the drain. The air-ventilating passage, the chamber and the drain preferably extend fr-om the printer head in the same direction as the printing jets.
An exemplary embodiment of the invention will now be described with reference to the accompanying diagrammatic drawing, in which :-Figure 1 shows diagrammatically an air-ventilating device in accordance with the invention; and Figure 2 shows diagrammatically an ink-operated mosaic print-- er head in which there is arranged such air-ventilating device.
The ink supply device shown in Figure 1 ~mprices a reservoir bottle 1 which communicates through a line 2 with a printer head 3, shown in chain lines. The printer head has arranged therein a plur~
ality of piezoelectric jets 4 arranged at the pitch interval of the mosaic grid, by means of which jets droplets of ink are ejected in accordance with the character being printed and in the rhythm of op-eration of a character generator (not shown) upstream of the printi-ng jets is a distributor 5 which is adapted to supply the individual jets with ink. The distributor 5 comprises a riser pipe into which all the printing jets 4 open out. Arranged in the neighbourhood of the highest point of the ink supply device (in the illustrated case at the top end of the distributor 5) is an air-ventilating device which comprises a narrow passage or tube 6, the diameter of which is such as to provide a capillary effect. The passage or tube 6 links the ink supply system with the surrounding atmosphere and the end of the passage 6 remote from the distributor 5 has or communicates with : :, : : , . .; :: :: :. :: .: -: .
1078~10 an enlargement 7, designed to receive printing ink.
Air which may have collected in the distributor 5 for example, can be readily removed therefrom prior to setting the ink-operated mosaic printer unit into operation, by placing the ink in the system under pressure, using the manually operated pump 11 for the purpose.
The pump acts upon the ink bladder 9 housed in the reservoir 1, the-reby increasing the pressure in the ink system. Consequently, the level of the liquid in the riser pipe 5 will increase and the liquid will gradually fill the printing jets 4. When the printing jets are full, air will escape through the tubes 6, with the exception of an air bubble, shown at 10, which serves to dampen hydraulic vibrations.
When the liquid reaches the tubes or passages 6, the printing liquid will enter the passages or tubes and close them off-with respect to the amblent air. As the pressure is maintained~ the ink penetrates through the tubes or passages 6 and collects in the enlargement 7.
~nce this is full surplus ink will drain off through the drain pass-age 8.
In order to remove any air which collects in the riser pipe du-ring operation of the printing system, in a similar fashion the liq-uid-level in the riser pipe 5 is increased by means of the hand-ope-rated pump 8, so that the air is expelled through the passages or tu-bes 6 until the liquid closes the tubes or passages off. In this connection,should the air-ventilation operation be broken off prema-turely before the rising level of liquid has reached the tubes or pa-ssages 6, then the ink contained in the enlargement 7 will run back into said tubes or passages and closes them off from the ambient sur-roundings. This prevents the distributor arrangement 5 from running empty.
~,, .
.. . .. ,. ~
, . - , . -. ...
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An ink-jet printer having a printing-ink supply system and comprising a printer head having arranged therein a plurality of printing jets each of which is connected to an ink-distributing device, and further comprising an ink-reservoir connected to the ink-distributing device and means for placing the ink in the reservoir under pressure, wherein the ink-distributing device is arranged to communicate with the ambient air through an air-ventilating passage of such diameter as to provide a capillary effect.
2. A printer as claimed in Claim 1, wherein the end of the air-ventilation passage remote fron the ink-distributing device communicates with a printing-ink collection chamber.
3. A printer as claimed in Claim 2, wherein the air-ventilating passage is arranged at the highest point of the printer head in the normal position of use of the printer.
4. A printer as claim in Claim 3, wherein the end of the collecting chamber remote from the air-ventilating passage com-municates with a drain.
5. A printer as claimed in Claim 4, wherein the drain extends in the same direction as the printing jets.
6. A printer as claimed in Claim 1, wherein the ink-distributing device and the air-ventilating passage are so arranged relative to one another that, when the printer is in use, a plenum is provided above the surface of the ink in said distributing device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2543452A DE2543452C3 (en) | 1975-09-29 | 1975-09-29 | Venting device for ink supply systems of inkjet writing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1078910A true CA1078910A (en) | 1980-06-03 |
Family
ID=5957768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,907A Expired CA1078910A (en) | 1975-09-29 | 1976-07-13 | Ink-jet printers |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4126868A (en) |
| JP (1) | JPS5913989B2 (en) |
| CA (1) | CA1078910A (en) |
| DE (1) | DE2543452C3 (en) |
| FR (1) | FR2325514A1 (en) |
| GB (1) | GB1514085A (en) |
| IT (1) | IT1070562B (en) |
| NL (1) | NL178495C (en) |
| SE (1) | SE417412B (en) |
Families Citing this family (60)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2812562C2 (en) * | 1978-03-22 | 1983-09-08 | Siemens AG, 1000 Berlin und 8000 München | Device for optionally shutting off the flow of ink in ink typing devices of office, data or teletyping machines |
| JPS54153033A (en) * | 1978-05-22 | 1979-12-01 | Seiko Epson Corp | Ink jet recorder |
| JPS5830824B2 (en) * | 1978-06-07 | 1983-07-01 | 株式会社リコー | Inkjet head of inkjet recording device |
| JPS5511887A (en) * | 1978-07-14 | 1980-01-28 | Seiko Epson Corp | Ink jet recording device |
| US4463359A (en) * | 1979-04-02 | 1984-07-31 | Canon Kabushiki Kaisha | Droplet generating method and apparatus thereof |
| JPS55142664A (en) * | 1979-04-25 | 1980-11-07 | Hitachi Ltd | Ink jet recording device |
| JPS5675867A (en) * | 1979-11-22 | 1981-06-23 | Seiko Epson Corp | Ink jet recorder |
| JPS5734965A (en) * | 1980-08-11 | 1982-02-25 | Canon Inc | Liquid jet recorder |
| JPS5751475A (en) * | 1980-09-12 | 1982-03-26 | Seiko Epson Corp | Ink jet recording apparatus |
| US4329698A (en) * | 1980-12-19 | 1982-05-11 | International Business Machines Corporation | Disposable cartridge for ink drop printer |
| US4340896A (en) * | 1980-12-22 | 1982-07-20 | Pitney Bowes Inc. | Impulse ink jet ink delivery apparatus |
| DE3104077A1 (en) * | 1981-02-06 | 1982-09-09 | Philips Patentverwaltung Gmbh, 2000 Hamburg | "WRITING HEAD FOR INK JET PRINTER" |
| GB2104452B (en) * | 1981-06-29 | 1985-07-31 | Canon Kk | Liquid jet recording head |
| JPS58187367A (en) * | 1982-04-28 | 1983-11-01 | Nec Corp | Multi-nozzle printing head |
| DE3209947C1 (en) * | 1982-03-18 | 1983-12-15 | Siemens AG, 1000 Berlin und 8000 München | Device for deaeration and for the damping of pressure fluctuations in an ink-writer head |
| DE3238732A1 (en) * | 1982-10-19 | 1984-04-19 | Siemens AG, 1000 Berlin und 8000 München | Gas bubble trap |
| US4542389A (en) * | 1982-11-24 | 1985-09-17 | Hewlett-Packard Company | Self cleaning ink jet drop generator having crosstalk reduction features |
| US4517577A (en) * | 1983-02-10 | 1985-05-14 | Exxon Research And Engineering Co. | Method of and apparatus for priming an ink jet |
| JPS59129530U (en) * | 1983-02-18 | 1984-08-31 | 日立工機株式会社 | ink cartridge |
| JPH0611542B2 (en) * | 1983-04-21 | 1994-02-16 | キヤノン株式会社 | Liquid jet recording head and liquid jet apparatus using the same |
| JPS6040258A (en) * | 1983-08-15 | 1985-03-02 | Ricoh Co Ltd | Ink-jet imaging device |
| CA1256238A (en) * | 1984-02-14 | 1989-06-20 | Josephine M. Rosenski | High strength pigment binders for paper coatings containing carboxylated vinyl ester ethylene interpolymers |
| DE3576934D1 (en) * | 1984-10-16 | 1990-05-10 | Dataproducts Corp | INK JET. |
| DE3607992A1 (en) * | 1985-04-08 | 1986-10-09 | VEB Kombinat Robotron, DDR 8010 Dresden | Ink jet print head with a damping device dependent on the viscosity of the ink |
| US4659595A (en) * | 1985-10-07 | 1987-04-21 | National Starch And Chemical Corporation | Ethylene vinyl acetate compositions for paper saturation |
| US4695854A (en) * | 1986-07-30 | 1987-09-22 | Pitney Bowes Inc. | External manifold for ink jet array |
| GB2202799B (en) * | 1987-03-20 | 1991-09-18 | Canon Kk | Ink jet recording head and ink jet recording apparatus having the same |
| US4931811A (en) * | 1989-01-31 | 1990-06-05 | Hewlett-Packard Company | Thermal ink jet pen having a feedtube with improved sizing and operational with a minimum of depriming |
| CA2009631C (en) * | 1989-02-17 | 1994-09-20 | Shigeo Nonoyama | Pressure damper of an ink jet printer |
| DE3916965A1 (en) * | 1989-05-24 | 1989-11-09 | Siemens Ag | Ink supply container with controlled pressure increase |
| CA2025561C (en) * | 1989-09-18 | 1995-07-11 | Seiichiro Karita | Recording head with cover |
| US5355158A (en) * | 1990-01-11 | 1994-10-11 | Canon Kabushiki Kaisha | Ink jet apparatus and method of recovering ink jet head |
| DE69126900T2 (en) * | 1990-02-28 | 1998-02-12 | Canon Kk | Inkjet device |
| JP2840409B2 (en) * | 1990-08-24 | 1998-12-24 | キヤノン株式会社 | Ink jet recording head and ink jet recording apparatus |
| US6007190A (en) * | 1994-12-29 | 1999-12-28 | Encad, Inc. | Ink supply system for an ink jet printer having large volume ink containers |
| JP3183146B2 (en) * | 1995-04-10 | 2001-07-03 | 富士ゼロックス株式会社 | Ink tank and recording device |
| US5686947A (en) | 1995-05-03 | 1997-11-11 | Encad, Inc. | Ink jet printer incorporating high volume ink reservoirs |
| US5771053A (en) * | 1995-12-04 | 1998-06-23 | Hewlett-Packard Company | Assembly for controlling ink release from a container |
| US5847734A (en) * | 1995-12-04 | 1998-12-08 | Pawlowski, Jr.; Norman E. | Air purge system for an ink-jet printer |
| US5732751A (en) * | 1995-12-04 | 1998-03-31 | Hewlett-Packard Company | Filling ink supply containers |
| US5815182A (en) * | 1995-12-04 | 1998-09-29 | Hewlett-Packard Company | Fluid interconnect for ink-jet pen |
| US5900895A (en) * | 1995-12-04 | 1999-05-04 | Hewlett-Packard Company | Method for refilling an ink supply for an ink-jet printer |
| JP3666537B2 (en) * | 1996-11-14 | 2005-06-29 | セイコーエプソン株式会社 | Method for manufacturing ink cartridge for ink jet recording apparatus |
| US6145968A (en) * | 1997-03-07 | 2000-11-14 | Encad, Inc. | System and method for supplying ink to a printer |
| ES2344835T3 (en) | 2002-05-29 | 2010-09-08 | Durst Phototechnik A.G. | PRINTING DEVICE FOR INK JET. |
| AT412332B (en) * | 2002-05-29 | 2005-01-25 | Durst Phototech Digital Tech | Inkjet printer has connection opening for printing head coupled to supply lines leading from different ink and/or cleaning medium supply tanks via blocking element |
| US7002609B2 (en) * | 2002-11-07 | 2006-02-21 | Brother International Corporation | Nano-structure based system and method for charging a photoconductive surface |
| US7001013B2 (en) * | 2002-12-12 | 2006-02-21 | Brother International Corporation | Nanostructure based microfluidic pumping apparatus, method and printing device including same |
| US6951387B2 (en) * | 2003-01-15 | 2005-10-04 | Xerox Corporation | Ink tank with capillary member |
| US7918530B2 (en) | 2006-02-03 | 2011-04-05 | Rr Donnelley | Apparatus and method for cleaning an inkjet printhead |
| US20090021542A1 (en) * | 2007-06-29 | 2009-01-22 | Kanfoush Dan E | System and method for fluid transmission and temperature regulation in an inkjet printing system |
| US8419157B2 (en) * | 2010-02-26 | 2013-04-16 | Palo Alto Research Center Incorporated | Apparatus for controlled freezing of melted solid ink in a solid ink printer |
| US8562117B2 (en) | 2011-02-07 | 2013-10-22 | Palo Alto Research Center Incorporated | Pressure pulses to reduce bubbles and voids in phase change ink |
| US8556372B2 (en) | 2011-02-07 | 2013-10-15 | Palo Alto Research Center Incorporated | Cooling rate and thermal gradient control to reduce bubbles and voids in phase change ink |
| US8506063B2 (en) | 2011-02-07 | 2013-08-13 | Palo Alto Research Center Incorporated | Coordination of pressure and temperature during ink phase change |
| US20120200630A1 (en) * | 2011-02-07 | 2012-08-09 | Palo Alto Research Center Incorporated | Reduction of bubbles and voids in phase change ink |
| US8888208B2 (en) | 2012-04-27 | 2014-11-18 | R.R. Donnelley & Sons Company | System and method for removing air from an inkjet cartridge and an ink supply line |
| CN108778753B (en) | 2016-03-04 | 2020-04-21 | R.R.当纳利父子公司 | Printhead maintenance station and method of operating the same |
| CN207291314U (en) | 2016-05-09 | 2018-05-01 | R.R.当纳利父子公司 | Ink feeding unit |
| WO2018145079A1 (en) * | 2017-02-06 | 2018-08-09 | Mietzner Jr Leroy W | Boom safe, anti-tip system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE349676B (en) * | 1971-01-11 | 1972-10-02 | N Stemme | |
| US3708798A (en) * | 1971-12-23 | 1973-01-02 | Ibm | Ink distribution for non-impact printing recorder |
| DE2261734C3 (en) * | 1971-12-25 | 1982-06-03 | Casio Computer Co., Ltd., Tokyo | Ink jet recorder |
| SE371901B (en) * | 1973-12-28 | 1974-12-02 | Facit Ab | |
| SE371900B (en) * | 1973-12-28 | 1974-12-02 | Facit Ab | |
| JPS5121439A (en) * | 1974-08-14 | 1976-02-20 | Matsushita Electric Ind Co Ltd | Inkujetsutohetsudo |
-
1975
- 1975-09-29 DE DE2543452A patent/DE2543452C3/en not_active Expired
-
1976
- 1976-03-30 SE SE7603786A patent/SE417412B/en not_active IP Right Cessation
- 1976-06-23 GB GB26069/76A patent/GB1514085A/en not_active Expired
- 1976-07-13 CA CA256,907A patent/CA1078910A/en not_active Expired
- 1976-09-10 FR FR7627350A patent/FR2325514A1/en active Granted
- 1976-09-10 US US05/721,950 patent/US4126868A/en not_active Expired - Lifetime
- 1976-09-22 NL NLAANVRAGE7610531,A patent/NL178495C/en not_active IP Right Cessation
- 1976-09-24 IT IT27591/76A patent/IT1070562B/en active
- 1976-09-29 JP JP51117073A patent/JPS5913989B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL178495C (en) | 1986-04-01 |
| DE2543452C3 (en) | 1980-06-12 |
| US4126868A (en) | 1978-11-21 |
| NL7610531A (en) | 1977-03-31 |
| DE2543452A1 (en) | 1977-03-31 |
| NL178495B (en) | 1985-11-01 |
| IT1070562B (en) | 1985-03-29 |
| JPS5913989B2 (en) | 1984-04-02 |
| JPS5249032A (en) | 1977-04-19 |
| FR2325514B1 (en) | 1983-01-28 |
| FR2325514A1 (en) | 1977-04-22 |
| SE417412B (en) | 1981-03-16 |
| SE7603786L (en) | 1977-03-30 |
| GB1514085A (en) | 1978-06-14 |
| DE2543452B2 (en) | 1979-09-20 |
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