EP1942005B1 - An ink cartridge - Google Patents

An ink cartridge Download PDF

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Publication number
EP1942005B1
EP1942005B1 EP06722092A EP06722092A EP1942005B1 EP 1942005 B1 EP1942005 B1 EP 1942005B1 EP 06722092 A EP06722092 A EP 06722092A EP 06722092 A EP06722092 A EP 06722092A EP 1942005 B1 EP1942005 B1 EP 1942005B1
Authority
EP
European Patent Office
Prior art keywords
valve
air
ink
ink cartridge
valve body
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
EP06722092A
Other languages
German (de)
French (fr)
Other versions
EP1942005A1 (en
EP1942005A4 (en
EP1942005B8 (en
Inventor
Jun-Zhong Wu
Yi Zhou
Nine Star Electronic Science And Technology Zhuhai
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.)
Zhuhai Nine Star Electronic Science and Technology
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PL06722092T priority Critical patent/PL1942005T3/en
Publication of EP1942005A1 publication Critical patent/EP1942005A1/en
Publication of EP1942005A4 publication Critical patent/EP1942005A4/en
Application granted granted Critical
Publication of EP1942005B1 publication Critical patent/EP1942005B1/en
Publication of EP1942005B8 publication Critical patent/EP1942005B8/en
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
    • B41J2/17596—Ink pumps, ink valves

Definitions

  • the present invention relates to an ink cartridge for a universal printer.
  • a negative pressure generating mechanism using a valve structure constituted of a membrane and a spring is employed in an ink cartridge.
  • the negative pressure generating mechanism is disposed between an ink storage region and an ink supply port.
  • the membrane is pressed onto a valve seat by a force exerted by a spring, so as to seal an ink channel.
  • EP-A-1199178 discloses an ink cartridge with a differential pressure mechanism between the ink flow port and the ink supply chamber.
  • the manufacturing efficiency of the ink cartridges may possibly be lowered.
  • the ink storage region in order to balance the pressure inside an ink cartridge, the ink storage region must be communicated with atmospheric air and thus an ink leakage prevention mechanism needs to be added.
  • the present invention is directed to an ink cartridge for a universal printer which uses a simple valve structure to stably provide ink to a print record header.
  • the present invention provides an ink cartridge for a universal printer comprising a liquid accommodation chamber and an air pressure-difference valve connected to the liquid accommodation chamber to keep the liquid accommodation chamber in a negative pressure state, wherein the air pressure-difference valve comprises:
  • the present invention adopts an air pressure-difference valve to keep a liquid accommodation chamber in a negative pressure state.
  • the air pressure-difference valve is connected to the liquid accommodation chamber to keep it in a negative pressure state.
  • the air pressure-difference valve may be disposed in the ink storage chamber or on a front cover.
  • the front cover or the ink storage chamber has the air hole in communication with atmospheric air.
  • the air pressure-difference valve of the present invention is used to control an overall negative pressure of a gas and liquid inside the ink storage chamber.
  • the present invention can omit springs and reduces the number of parts and components thereby reducing requirements for manufacturing processes and the cost.
  • the air pressure-difference valve may be a check valve which prevents the ink from leaking out of the ink storage chamber. Thus an ink leakage prevention mechanism can be omitted and the cost is further reduced.
  • the present invention includes a liquid accommodation chamber and an air pressure-difference valve.
  • the air pressure-difference valve includes a front valve body (or an ink storage chamber) 1, a rear valve body (or a cap) 6, an air hole 2, and an air tank 3.
  • a pressure adjustment mechanism is disposed in the ink storage chamber 1 or on a front cover.
  • the air tank 3 is formed in the rear valve body 6.
  • a boss protrudes at a central portion of a bottom of the air tank.
  • a small round hole having a rim is formed in the valve membrane 4. The round hole is pressed by the boss protruding from the rear valve body 6.
  • the air pressure-difference valve is installed in the ink storage chamber I or on the front cover.
  • the front cover or the ink storage chamber 1 has the air hole 2 in communication with atmospheric air.

Landscapes

  • Ink Jet (AREA)
  • Pens And Brushes (AREA)
  • Switches With Compound Operations (AREA)

Abstract

An ink cartridge for a universal printer includes a liquid accommodation chamber and an air pressure-difference valve connected to the liquid accommodation chamber to keep it in a negative pressure state. The air pressure-difference valve includes a front valve body or an ink storage chamber, a valve membrane, a rear valve body or a cap, an air hole, and an air tank. The air tank is formed in the rear valve body. A boss protrudes at a central portion of a bottom of the air tank. A small round hole having a rim is formed in the valve membrane. The round hole is pressed by the boss protruding from the rear valve body. The air pressure-difference valve is disposed in the ink storage chamber or on a front cover. The front cover or the ink storage chamber has an air hole in communication with atmospheric air.

Description

  • The present invention relates to an ink cartridge for a universal printer.
  • In the conventional art, for example, as recited in the specification of Chinese Patent Application No. 03102633.8 (publication number : CN 1481996A ) entitled "Ink Cartridge and Method of Regulating Fluid Flow", a negative pressure generating mechanism using a valve structure constituted of a membrane and a spring is employed in an ink cartridge. The negative pressure generating mechanism is disposed between an ink storage region and an ink supply port. Generally speaking, the membrane is pressed onto a valve seat by a force exerted by a spring, so as to seal an ink channel. When a print record header injects ink to cause a negative pressure exceeding a specified value at an ink supply port side, the membrane will depart from the valve seat against the force exerted by the spring, thereby opening the ink channel temporarily. Thus the ink flows towards the ink supply port from the ink storage region and at the same time, the negative pressure at the ink supply port side decreases to below the specified value.
  • Each of EP-A-1199178 , EP-A-1125747 , EP-A-1016533 and US-16193364 discloses an ink cartridge with a differential pressure mechanism between the ink flow port and the ink supply chamber.
  • Consequently the number of the parts and components is increased since the spring is used. Furthermore, in order to assemble the spring, the manufacturing efficiency of the ink cartridges may possibly be lowered. Meanwhile, in order to balance the pressure inside an ink cartridge, the ink storage region must be communicated with atmospheric air and thus an ink leakage prevention mechanism needs to be added.
  • In view of the aforementioned problems, the present invention is directed to an ink cartridge for a universal printer which uses a simple valve structure to stably provide ink to a print record header.
  • Thus viewed from a first aspect the present invention provides an ink cartridge for a universal printer comprising a liquid accommodation chamber and an air pressure-difference valve connected to the liquid accommodation chamber to keep the liquid accommodation chamber in a negative pressure state, wherein the air pressure-difference valve comprises:
    • a valve member made of an elastic material and being a circular valve membrane with a round hole at its center having a rim;
    • a valve casing matching the valve member;
    • a front valve body or an ink storage chamber;
    • a rear valve body or a cap;
    • an air hole;
    • an air tank formed in the rear valve body; and
    • a boss protruding into a central portion of a bottom of the air tank,
    • wherein the round hole is engaged by a boss protruding from the rear valve body.
  • In order to achieve the aforementioned objective, the present invention adopts an air pressure-difference valve to keep a liquid accommodation chamber in a negative pressure state. The air pressure-difference valve is connected to the liquid accommodation chamber to keep it in a negative pressure state. The air pressure-difference valve may be disposed in the ink storage chamber or on a front cover. The front cover or the ink storage chamber has the air hole in communication with atmospheric air.
  • Based on the aforementioned solution, the air pressure-difference valve of the present invention is used to control an overall negative pressure of a gas and liquid inside the ink storage chamber. The present invention can omit springs and reduces the number of parts and components thereby reducing requirements for manufacturing processes and the cost. The air pressure-difference valve may be a check valve which prevents the ink from leaking out of the ink storage chamber. Thus an ink leakage prevention mechanism can be omitted and the cost is further reduced.
  • Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only.
  • The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus is not limitative of the present invention, and wherein:
    • FIG. 1 is a schematic view illustrating the relationship between installation positions of an air pressure-difference valve of the present invention.
    • FIG. 2 is a schematic structural view of the air pressure-difference valve of the present invention.
  • The present invention will be described in detail in the following embodiment.
  • Referring to FIGs. 1 and 2, the present invention includes a liquid accommodation chamber and an air pressure-difference valve. The air pressure-difference valve includes a front valve body (or an ink storage chamber) 1, a rear valve body (or a cap) 6, an air hole 2, and an air tank 3. A pressure adjustment mechanism is disposed in the ink storage chamber 1 or on a front cover. The air tank 3 is formed in the rear valve body 6. A boss protrudes at a central portion of a bottom of the air tank. A small round hole having a rim is formed in the valve membrane 4. The round hole is pressed by the boss protruding from the rear valve body 6. The air pressure-difference valve is installed in the ink storage chamber I or on the front cover. The front cover or the ink storage chamber 1 has the air hole 2 in communication with atmospheric air.

Claims (5)

  1. An ink cartridge for a universal printer comprising a liquid accommodation chamber and an air pressure-difference valve connected to the liquid accommodation chamber to keep the liquid accommodation chamber in a negative pressure state, wherein the air pressure-difference valve comprises:
    a valve member (4) made of an elastic material and being a circular valve membrane with a round hole at its center having a rim;
    a valve casing matching the valve member;
    a front valve body or an ink storage chamber (1);
    a rear valve body or a cap (6);
    an air hole (2);
    an air tank (3) formed in the rear valve body; and
    a boss protruding into a central portion of a bottom of the air tank,
    wherein the round hole is engaged by a boss protruding from the rear valve body.
  2. The ink cartridge for a universal printer according to claim 1, wherein an ink intake port in connection with an ink channel is disposed at the base of the ink cartridge.
  3. The ink cartridge for a universal printer according to claim 2, wherein the air pressure-difference valve is a check valve mechanism.
  4. The ink cartridge for a universal printer according to claim 3, wherein a diameter of the check valve mechanism is in a range of 10 mm to 30 mm.
  5. The ink cartridge for a universal printer according to claim 4, wherein the check valve is disposed on any surface of the ink cartridge.
EP06722092A 2005-08-02 2006-03-21 An ink cartridge Expired - Lifetime EP1942005B8 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06722092T PL1942005T3 (en) 2005-08-02 2006-03-21 An ink cartridge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNU2005201150089U CN2832528Y (en) 2005-08-02 2005-08-02 Ink cartridge for ink-jet printer
PCT/CN2006/000440 WO2007014504A1 (en) 2005-08-02 2006-03-21 An ink cartridge

Publications (4)

Publication Number Publication Date
EP1942005A1 EP1942005A1 (en) 2008-07-09
EP1942005A4 EP1942005A4 (en) 2009-07-08
EP1942005B1 true EP1942005B1 (en) 2010-12-01
EP1942005B8 EP1942005B8 (en) 2011-10-05

Family

ID=37196844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722092A Expired - Lifetime EP1942005B8 (en) 2005-08-02 2006-03-21 An ink cartridge

Country Status (10)

Country Link
EP (1) EP1942005B8 (en)
CN (1) CN2832528Y (en)
AT (1) ATE490087T1 (en)
DE (1) DE602006018640D1 (en)
DK (1) DK1942005T3 (en)
ES (1) ES2354239T3 (en)
PL (1) PL1942005T3 (en)
PT (1) PT1942005E (en)
RU (1) RU2380235C2 (en)
WO (1) WO2007014504A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08174860A (en) * 1994-10-26 1996-07-09 Seiko Epson Corp Ink cartridge for inkjet printer
JP3414583B2 (en) * 1996-04-24 2003-06-09 セイコーエプソン株式会社 Ink cartridge for inkjet printer
ES2301888T5 (en) * 1998-07-15 2013-04-12 Seiko Epson Corporation Ink supply unit
CN1184076C (en) * 2000-02-16 2005-01-12 精工爱普生株式会社 Ink cartridges for inkjet printers
KR100487976B1 (en) * 2000-10-20 2005-05-10 세이코 엡슨 가부시키가이샤 Ink cartridge for ink jet recording device
JP3596611B2 (en) * 2000-10-20 2004-12-02 セイコーエプソン株式会社 Ink cartridge for inkjet recording device
CN2544940Y (en) * 2002-04-27 2003-04-16 珠海纳思达电子科技有限公司 Ink cartridge of printer
CN2631756Y (en) * 2003-07-28 2004-08-11 珠海纳思达电子科技有限公司 Printer ink cartridge with valve
CN2666669Y (en) * 2003-10-10 2004-12-29 佛山凯德利办公用品有限公司 Ink box

Also Published As

Publication number Publication date
RU2380235C2 (en) 2010-01-27
ATE490087T1 (en) 2010-12-15
EP1942005A1 (en) 2008-07-09
EP1942005A4 (en) 2009-07-08
CN2832528Y (en) 2006-11-01
ES2354239T3 (en) 2011-03-11
DK1942005T3 (en) 2011-02-28
EP1942005B8 (en) 2011-10-05
PT1942005E (en) 2011-02-10
WO2007014504A1 (en) 2007-02-08
RU2008114579A (en) 2009-10-20
PL1942005T3 (en) 2011-12-30
DE602006018640D1 (en) 2011-01-13

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