EP1524119B1 - Tintenpatrone und Druckregelungsvorrichtung dafür - Google Patents

Tintenpatrone und Druckregelungsvorrichtung dafür Download PDF

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Publication number
EP1524119B1
EP1524119B1 EP20040024643 EP04024643A EP1524119B1 EP 1524119 B1 EP1524119 B1 EP 1524119B1 EP 20040024643 EP20040024643 EP 20040024643 EP 04024643 A EP04024643 A EP 04024643A EP 1524119 B1 EP1524119 B1 EP 1524119B1
Authority
EP
European Patent Office
Prior art keywords
ink
ink cartridge
vent
air bag
ink reservoir
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
Application number
EP20040024643
Other languages
English (en)
French (fr)
Other versions
EP1524119A2 (de
EP1524119A3 (de
Inventor
Chin-Tien Lo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microjet Technology Co Ltd
Original Assignee
Microjet Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Microjet Technology Co Ltd filed Critical Microjet Technology Co Ltd
Publication of EP1524119A2 publication Critical patent/EP1524119A2/de
Publication of EP1524119A3 publication Critical patent/EP1524119A3/de
Application granted granted Critical
Publication of EP1524119B1 publication Critical patent/EP1524119B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • 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
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17556—Means for regulating the pressure in the cartridge
    • 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
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves

Definitions

  • the present invention relates to an ink cartridge, and more particularly to an ink cartridge with a pressure regulating device.
  • the ink cartridge is a very important expendable of the inkjet printer.
  • the internal pressure regulating device should maintain a desirable performance, such that the back pressure of the ink cartridge can be maintained at a stable level. Therefore, a constant volume of ink can be supplied in operation. Otherwise, if the back pressure of the ink cartridge fails to be maintained at a stable level, the ink contained therein is likely to leak from the printhead or fails to be ejected out, and the service life of the ink cartridge will be reduced accordingly.
  • the inkjet printers are typically classified into two types, i.e. a thermal bubble inkjet printer and a piezoelectric inkjet printer. So far, the thermal bubble inkjet printer is relatively popular.
  • the thermal bubble inkjet printer is operated by rapidly heating a small volume of ink to cause the ink to vaporize and be ejected through one of a plurality of nozzles so as to print a dot of ink on a medium such as a paper.
  • the piezoelectric inkjet printer allows piezoelectric quartz crystals to result in a constant oscillating frequency in response to an electrical signal, thereby ejecting the ink through the one of a plurality of nozzles.
  • back pressure indicates that a partial vacuum within the ink cartridge or the pressure that is slightly smaller than the external atmospheric pressure of the ink cartridge.
  • the back pressure can permit the ink within the ink cartridge to be maintained at a stable state and inhibit the flow of the ink through the printhead as the printhead is inactive. Also, the back pressure permits the ink to be ejected out smoothly as the printhead is active.
  • the thermal bubble inkjet printer should have a specifically designed pressure regulating device with respect to different operating conditions such as pressures, temperatures or amount of ink.
  • the pressure regulating devices are classified into the two types, as will be illustrated in details as follows.
  • a pressure regulating device utilizes a porous cotton filter as the ink storing and giving element.
  • a porous cotton filter is mounted in the ink cartridge.
  • the ink is absorbed in the porous cotton filter.
  • the absorption capacity of the ink is about 85% of the volume of the porous cotton filter
  • the ink cartridge fails to store a sufficient amount of ink.
  • the adsorbed ink fails to be fully released, a portion of the ink may be maintained in the porous cotton filter when the ink cartridge is discarded.
  • the composition of the ink comprises several corrosive components.
  • the porous cotton filter may be corroded and the residues thereof may block the nozzles of the printhead. Furthermore, since the porous cotton filter is flexible and readily deformed by an external force, the procedure of placing the porous cotton filter in the ink cartridge is time consuming.
  • FIGs. 1 (a) and 1(b) a conventional air bag-type pressure regulating device used in an ink cartridge is shown.
  • the ink cartridge comprises a housing 11, an exit port 12, two air bags 13, a pair of elastic sheets 14 and a tube 15.
  • the housing 11 defines an ink reservoir 111 for storing ink.
  • the neck portions of the air bags 13 are secured to the bottom of a connecting body 112.
  • the connecting body 112 has a through hole for permitting ventilation between the air bags 13 and the exterior air.
  • One end of each elastic sheet 14 is disposed at the connecting body 112 and the inner surface of each elastic sheet 14 is attached on the air bag 13.
  • the tube 15 extends from the top to the bottom of the ink reservoir 111.
  • the elastic sheets 14 work with the air bags 13 and enable the air bags 13 to inflate or deflate in response to the changes in pressure. Such inflation/deflation takes place when the pressure inside the ink reservoir 111 changes as well as when the pressure outside of the ink reservoir 111 changes.
  • each elastic sheet 14 is disposed at the connecting body 112 above the housing 11, the portion of the air bag 13 in the vicinity of the connecting body 112, which has a length of about 10 mm, fails to fully spread due to restriction by the elastic sheets 14.
  • the tail ends of the elastic sheets 14 may be sustained against the sidewall of the ink cartridge, and thus the air bags 13 no longer inflate to further adjust pressure within the ink cartridge as well as release ink.
  • the tube 15 can adjust pressure within the ink cartridge according to a siphonal effect.
  • the ink stored in the ink reservoir 111 is lower than a critical level
  • the ink remained in the tube 15 may flow out, such that the exterior air flows in the ink reservoir 111 and the back pressure is destroyed. Therefore, the ink remained in the ink cartridge may flow out from the exit port 12. Even though the critical level is changed and lowered to a recess at the bottom of the ink cartridge, the ink remained in the tube 15 may flow out and the back pressure is readily destroyed when the ink cartridge is reversed.
  • the ink cartridge 2 comprises an upper portion 22 and a lower portion 21, which together form an ink reservoir 23 for storing ink.
  • the upper portion 22 has an ink-filling hole 221 for introducing ink therethrough. After the ink reservoir 23 is refilled with ink, the ink-filling hole 22 is closed by a plug 222.
  • An air bag 24 is disposed within the ink reservoir 23. Via a guide pipe 223, the air bag 24 is open to the exterior air, and thus the exterior air can be introduced into the air bag 24 so as to adjust pressure within the ink cartridge.
  • the ink reservoir 23 has a pressing plate 25 and an elastic component 26. One end of the elastic component 26 is connected to a sidewall of the pressing plate 25, while the other end thereof is connected to a sidewall of the lower portion 21.
  • the opposite sides of the air bag 24 are connected to another sidewall of the lower portion 21 and another sidewall of the pressing plate 25.
  • the arrangement of the elastic component 26 will exert a force against the air bag 24 to keep a back pressure so as to form an initial value of the back pressure in the ink reservoir 23 and avoid ink leakage.
  • the bottom of the lower portion 21 has an exit port 211.
  • a printhead 27 is disposed on the exit port 211 so as to eject ink to printing medium.
  • the lower portion 21 further comprises a gas supplement channel 212 formed between the sidewalls 213.
  • a block 28, for example a ball such as a steel ball, is disposed on the top of the gas supplement channel 212.
  • the bottom of the ink reservoir 23 comprises an elastic structure 29, which has a first portion 29a in contact with the block 28 and a second portion 29b in contact with the pressing plate 25.
  • the pressure regulating device of Fig. 2 still has some problems.
  • the elastic structure 29 and the gas supplement channel 212 are disposed on the bottom of the lower portion 21, the pressing plate 25 can be pushed by the air bag 24 to an insufficient extent.
  • the sensitivity of using the air bag 24 to control the pressing plate 25 is undesired, the exterior air flowing into the ink reservoir 23 may result in environmental change and impair maintenance of the back pressure. In other words, the ink contained therein is likely to leak from the printhead or fails to be ejected out, and the service life of the ink cartridge will be reduced accordingly.
  • US 6,056,395 relates to a device for preventing from ink interruption in a printing head of an ink cartridge in a printer.
  • the ink cartridge there are two symmetrical air-bladders and two pressing plates. Further, there is a supporting plate mounted on the upper ends of the air-bladders and the pressing plate and the plate 30 is fastened to a cylinder.
  • the cylinder is fixed in a round hole of a body part of the ink cartridge, and the center of the cylinder has an intake hole to allow air to enter the air-bladders via a passage.
  • the two pressing plates are fixed to the cylinder at the top of the housing and disposed at the outer sides of the two air-bladders, which also restrict the expansions of the air-bladders.
  • an ink cartridge comprising a housing, an air bag assembly, a filter assembly and an elastic structure.
  • the housing has an ink reservoir, a first vent, a second vent and an exit port.
  • the first vent and the second vent are disposed at the top and bottom of the housing, respectively.
  • the air bag assembly is disposed within the ink reservoir, comprises at least two air bags adjacent to a sidewall of the ink reservoir, and is open to the exterior air via the first vent.
  • the filter assembly is disposed at the bottom of the housing and open to the exterior air via the second vent, and comprises a filter for adjusting a flow rate of the exterior air flowing into the ink reservoir so as to smoothly adjust the inflation/deflation of the air bag assembly in response to a pressure change in the ink reservoir.
  • the elastic structure is fixed onto the filter assembly or the bottom of the ink reservoir, and comprising at least two elastic sheets disposed between the at least two air bags of the air bag assembly for applying thereon an elastic force.
  • the exit port is disposed at the bottom of the housing for ejecting ink to printing medium.
  • the housing further comprises a circuitous channel communicates with the filter assembly and the second vent so as to adjust the amount of the exterior air flowing into the ink reservoir.
  • the elastic structure further comprises a base connected with the elastic sheets.
  • the elastic structure is fixed onto said filter assembly by engaging the base of the elastic structure with a fastening recess of the filter assembly.
  • the elastic structure further comprises at least two extension plates in contact with respective air bags of the air bag assembly and connected to top ends of the elastic sheets.
  • the second vent is covered with a cover plate so as to protect the filter.
  • a pressure regulating device of an ink cartridge comprising a housing having an ink reservoir, a first vent, a second vent and an exit port.
  • the pressure regulating device comprises an air bag, a filter assembly and an elastic sheet.
  • the air bag is disposed within the ink reservoir, adjacent to a sidewall of the ink reservoir, and open to the exterior air via the first vent.
  • the filter assembly is disposed at the bottom of the housing and open to the exterior air via the second vent, and comprises a filter for adjusting a flow rate of the exterior air flowing into the ink reservoir so as to smoothly adjust the inflation/deflation of the air bag in response to a pressure change in the ink reservoir.
  • the elastic sheet is in contact with the air bag and applies an elastic force on the air bag.
  • an ink cartridge comprising a housing, an air bag and an elastic sheet.
  • the housing has an ink reservoir, a first vent, a second vent and an exit port.
  • the air bag is disposed within the ink reservoir, adjacent to a sidewall of the ink reservoir, and open to the exterior air via the first vent.
  • the elastic sheet is in contact with the air bag and applying an elastic force on the air bag.
  • Fig. 1(a) is a cross-sectional view illustrating a conventional pressure regulating device of an ink cartridge in a deflation state
  • Fig. 1(b) is a cross-sectional view illustrating a conventional pressure regulating device of an ink cartridge in an inflation state
  • Fig. 2 is a cross-sectional view illustrating another conventional pressure regulating device with an air bag
  • Fig. 3(a) is a cross-sectional view illustrating a pressure regulating device of an ink cartridge according to a preferred embodiment of the present invention
  • Fig. 3(b) is a cross-sectional view illustrating an air bag of the pressure regulating device of Fig. 3(a) in a deflation state;
  • Fig. 3(c) is a cross-sectional view illustrating the extension plate of the pressure regulating device of Fig. 3(a) ;
  • Fig. 3(d) is a partial enlarged cross-sectional view illustrating an filter assembly of the pressure regulating device of Fig. 3(a) ;
  • Figs. 4(a) ⁇ (d) are cross-sectional views illustrating the operating mechanisms of the pressure regulating device according to the present invention.
  • the ink cartridge comprises a housing 31 having therein an ink reservoir 311 for storing ink.
  • the housing 31 has a first vent 312 and a second vent 313 disposed at the top and bottom thereof, respectively.
  • the first vent 312 and the second vent 313 are open to the exterior air.
  • the bottom of the housing 31 has an exit port 32 communicates with the ink reservoir 311 so as to eject ink to printing medium.
  • An air bag assembly 33 is disposed within the ink reservoir 311.
  • the air bag assembly 33 comprises at least two air bags adjacent to inner sidewalls of the ink reservoir 311.
  • the air bag assembly 33 is open to the exterior air via the first vent 312. Inflation/deflation of air bag assembly 33 takes place when the pressure inside the ink reservoir 311 changes as well as when the pressure outside of the ink reservoir 311 changes.
  • a filter assembly 34 is disposed at the bottom of the housing 31, preferably at the center thereof.
  • the filter assembly 34 comprises a filter 341 and a fastening recess 343.
  • the filter 341 can be made of any porous high-density polymer.
  • the housing 31 further comprises a circuitous channel 342 communicates with the filter 341 and the second vent 313 so as to adjust the amount of the exterior air flowing into the ink reservoir 311.
  • the second vent 313 is covered with a cover plate 36 so as to protect the filter 341.
  • the elastic structure 35 is fixed onto the filter assembly 34 or the bottom of the housing 31.
  • the elastic structure 35 comprises a base and two elastic sheets, wherein two elastic sheets are integrally formed with the base.
  • the base of the elastic structure 35 is fixed onto the filter assembly 34 or the bottom of the housing 31 by engaging the inner edges of the base with a fastening recess 343 of the filter assembly 34 or a fastening recess (not shown) on the bottom of the housing 31.
  • Two elastic sheets of the elastic structure 35 are disposed between the two air bags of the air bag assembly 33, extend upwardly from the base of the elastic structure 35, and contact with respective air bag.
  • the elastic structure 35 comprises two extension plates 351.
  • the extension plates 351 are connected to the top ends of the elastic sheets and in contact with the respective air bags of the air bag assembly 33. As the air bag assembly 33 inflates, the extension plates 351 will be pushed to move from the sidewall toward the middle portion of the ink reservoir 311.
  • Figs. 4(a) ⁇ (d) illustrate the operating mechanisms of the pressure regulating device according to the present invention. For purposes of clarity, only the inflating mechanism of the left air bag cooperating with one elastic sheet and one extension plate 351 are illustrated in the drawings.
  • the left air bag of the air bag assembly 33 deflates to a minimum volume.
  • the extension plate 351 is substantially in contact with a sidewall of the ink reservoir 311, and the top end of the elastic sheet is also in contact with the sidewall of the ink reservoir.
  • the pressure regulating device provided by the present invention when comparing with other previous conventional technologies, has following advantages. For example, when the air bag assembly inflates to its maximum volume, the air bag assembly can fully spread because the elastic sheets are upright without contacting with the sidewall of the ink reservoir 311. Therefore, the sensitivity of using the air bag assembly 33 to control the back pressure is higher.
  • the arrangement of the filter 341 facilitates controlling amount of the exterior air flowing into the ink reservoir 311 such that the problem of ink leakage is avoided.

Landscapes

  • Ink Jet (AREA)

Claims (7)

  1. Tintenpatrone mit:
    einem Gehäuse (31), das ein Tintenreservoir (311), eine erste Lüftung (312), eine zweite Lüftung (313) und einen Auslassanschluss (32) aufweist, wobei die erste Lüftung (312) und die zweite Lüftung (313) an der Oberseite bzw. an der Unterseite des Gehäuses (311) angeordnet sind;
    einer in dem Tintenreservoir (311) angeordneten Luftbeutelbaugruppe (33), die mindestens zwei Luftbeutel benachbart zu einer Seitenwand des Tintenreservoirs (311) aufweist und über die erste Lüftung (312) zur Außenluft offen ist; und
    einer an der Unterseite des Gehäuses (31) angeordneten Filterbaugruppe (34), die über die zweite Lüftung (313) zur Außenluft offen ist und einen Filter (341) aufweist, um eine Strömungsrate der in das Tintenreservoir (311) strömenden Außenluft einzustellen, um so in Reaktion auf eine Druckänderung in dem Tintenreservoir (311) das Aufblasen/Abblasen der Luftbeutelbaugruppe (33) sanft einzustellen;
    dadurch gekennzeichnet, dass die Tintenpatrone außerdem eine elastische Struktur (35) aufweist, die an der Filterbaugruppe (34) oder an der Unterseite des Tintenreservoirs (311) befestigt ist und mindestens zwei elastische Platten aufweist, die zwischen den mindestens zwei Luftbeuteln der Luftbeutelbaugruppe (33) angeordnet sind, um auf diese eine elastische Kraft auszubringen.
  2. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, dass der Auslassanschluss (32) an der Unterseite des Gehäuses (31) angeordnet ist, um Tinte zu einem Druckmedium auszugeben.
  3. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (31) außerdem einen Umgehungskanal (342) aufweist, der mit der Filterbaugruppe (34) und der zweiten Lüftung (313) in Verbindung steht, um so die Menge der Außenluft einzustellen, die in das Tintenreservoir (311) strömt.
  4. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, dass die elastische Struktur (35) außerdem eine Basis aufweist, die mit den mindestens zwei elastischen Platten verbunden ist.
  5. Tintenpatrone nach Anspruch 4, dadurch gekennzeichnet, dass die elastische Struktur (35) an der Filterbaugruppe (34) befestigt ist, indem die Basis der elastischen Struktur (35) mit einer Befestigungsaussparung (343) der Filterbaugruppe (34) eingreift.
  6. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, dass die elastische Struktur (35) außerdem zumindest zwei Erweiterungsplatten (351) aufweist, die mit zugehörigen Luftbeuteln der Luftbeutelbaugruppe (33) in Kontakt stehen und mit oberen Enden der elastischen Platten verbunden sind.
  7. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Lüftung (313) mit einer Abdeckplatte (36) abgedeckt ist, um so den Filter (341) zu schützen.
EP20040024643 2003-10-16 2004-10-15 Tintenpatrone und Druckregelungsvorrichtung dafür Expired - Lifetime EP1524119B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB200310101599XA CN100337827C (zh) 2003-10-16 2003-10-16 墨水匣及其负压调节机构
CN200310101599 2003-10-16

Publications (3)

Publication Number Publication Date
EP1524119A2 EP1524119A2 (de) 2005-04-20
EP1524119A3 EP1524119A3 (de) 2005-06-22
EP1524119B1 true EP1524119B1 (de) 2009-08-26

Family

ID=34333057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040024643 Expired - Lifetime EP1524119B1 (de) 2003-10-16 2004-10-15 Tintenpatrone und Druckregelungsvorrichtung dafür

Country Status (4)

Country Link
EP (1) EP1524119B1 (de)
CN (1) CN100337827C (de)
BR (1) BRPI0405076B1 (de)
DE (1) DE602004022756D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5274172B2 (ja) * 2008-09-17 2013-08-28 株式会社日立産機システム インクジェット記録装置
CN103282209B (zh) 2011-01-07 2015-07-15 惠普发展公司，有限责任合伙企业 具有多个室和阀的流体容器
EP3265316A4 (de) * 2015-03-06 2018-09-26 Hewlett-Packard Development Company, L.P. Druckflüssigkeitsbehälter
US10596821B2 (en) 2016-04-21 2020-03-24 Hewlett-Packard Development Company, L.P. Rocker valve
CN112919527A (zh) * 2021-02-22 2021-06-08 江西崇政科技有限公司 一种溶铜装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537134A (en) * 1990-01-12 1996-07-16 Hewlett-Packard Company Refill method for ink-jet print cartridge
TW438684B (en) * 1998-09-30 2001-06-07 Ind Tech Res Inst Pressure control device for ink cartridge
US6056395A (en) * 1998-12-22 2000-05-02 Liu; Win-Yin Device to prevent from ink interruption in a printing head of an ink cartridge in a printer
JP2001347686A (ja) * 2000-04-05 2001-12-18 Nitto Denko Corp インク容器用通気フィルタおよびこれを用いたインク容器
TW528685B (en) * 2001-08-24 2003-04-21 Microjet Technology Co Ltd Pressure regulating method for ink cartridge and the device thereof
CN2553998Y (zh) * 2002-06-04 2003-06-04 珠海佳科新科技有限公司 打印机墨盒

Also Published As

Publication number Publication date
EP1524119A2 (de) 2005-04-20
BRPI0405076A (pt) 2005-06-14
EP1524119A3 (de) 2005-06-22
BRPI0405076B1 (pt) 2018-07-31
DE602004022756D1 (de) 2009-10-08
CN1607094A (zh) 2005-04-20
CN100337827C (zh) 2007-09-19

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