EP0931658B1 - Dispositif à jet d'encre avec élément filtrant - Google Patents

Dispositif à jet d'encre avec élément filtrant Download PDF

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Publication number
EP0931658B1
EP0931658B1 EP19990200089 EP99200089A EP0931658B1 EP 0931658 B1 EP0931658 B1 EP 0931658B1 EP 19990200089 EP19990200089 EP 19990200089 EP 99200089 A EP99200089 A EP 99200089A EP 0931658 B1 EP0931658 B1 EP 0931658B1
Authority
EP
European Patent Office
Prior art keywords
filter element
ink jet
jet device
port
ink
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
EP19990200089
Other languages
German (de)
English (en)
Other versions
EP0931658A1 (fr
Inventor
Peter Joseph Hollands
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.)
Canon Production Printing Netherlands BV
Original Assignee
Oce Technologies BV
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 Oce Technologies BV filed Critical Oce Technologies BV
Priority to EP19990200089 priority Critical patent/EP0931658B1/fr
Publication of EP0931658A1 publication Critical patent/EP0931658A1/fr
Application granted granted Critical
Publication of EP0931658B1 publication Critical patent/EP0931658B1/fr
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
    • B41J2/17563—Ink filters
    • 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

Definitions

  • the invention relates to an ink jet device comprising an ink reservoir and a filter element made of a sheet-like material having a curved shape and sealingly disposed in a port of the ink reservoir.
  • an ink reservoir is incorporated in the printhead or in a separate cartridge and serves to accommodate a certain amount of liquid ink which is to be supplied to a nozzle system of the printhead.
  • a filter element is disposed either in an inlet port or an outlet port of the ink reservoir, so that the ink is filtered before it is supplied to the nozzle system.
  • the port should be sealed by the filter element so that the ink may not leak around the filter element.
  • US-A-5 537 136 discloses an ink jet device of the type indicated above wherein the filter element is a stainless steel wire mesh which has a spherically curved shape.
  • US-A-5 502 479 and EP-A-0 603 902 disclose similar ink jet devices in which the filter element is bent into a cylindrical shape so that it forms a slitted tubular member.
  • the filter element is secured in the port of the ink reservoir by means of an adhesive, by welding or by injection molding techniques.
  • an adhesive for example, as is disclosed in US-A-5 537 136, the edge of the dome-shaped filter element is imbedded in an elastomeric material by injection molding, so that a self-sealing cap is formed which is placed over the port of the ink reservoir.
  • the filter element is inserted in the port of the ink reservoir in an elastically deformed state and is held in engagement with the walls of this port by its elastic restoration forces.
  • the filter element can simply be mounted by inserting it into the port in a slightly compressed state, and elastic restoration forces of the filter element will cause the same to expand again and to sealingly engage the walls of the port.
  • elastic restoration forces of the filter element will cause the same to expand again and to sealingly engage the walls of the port.
  • the filter element which may be woven or non-woven fabric of stainless steel fibres, has a tubular shape and is inserted into a channel defined between opposing walls of the port of the ink reservoir.
  • the walls of this channel are matched to the tubular shape of the filter element, so that the filter element will sealingly engage the walls of the channel in a larger surface area.
  • the port of the ink reservoir has a rectangular cross-section, and the channel extends in parallel with the longer sides of this rectangular cross-section. Both ends of the channel are prolonged by recesses or holes formed in the shorter side walls of the port, so that both ends of the tubular filter element can be accommodated in these recesses or holes. At least one end of the channel is formed as a through-hole in the side wall of the port, so that the filter element can be inserted into the channel through this through-hole which may then be closed with a plug or the like.
  • An ink reservoir 10 in an ink cartidge or a printhead of an ink jet printer is formed by a casing having a bottom wall 12, two parallel longer side walls 14 and two parallel shorter side walls 16.
  • the side walls 14, 16 define an inlet port 18 which has an elongated rectangular cross-section when viewed from above. Liquid ink can be filled into the ink reservoir 10 through the inlet port 18.
  • Outlet ports 20, through which the ink is supplied to a nozzle system (not shown) of the printhead, are formed as elongate slots in the side walls 14 close to the bottom wall 12.
  • the internal surfaces of the longer side walls 14 are formed with elongate recesses which have the cross-sectional shape of a segment of a circle and are mutually opposed to each other so that they define a cylindrical channel 22 which extends in parallel with the side walls 14.
  • This channel 22 accommodates a filter element 24.
  • the filter element 24 is formed by a rectangular sheet of stainless steel mesh or fabric which has been rolled or bent into a tubular shape, so that it has the configuration of a circular cylinder with a longitudinal slit 26.
  • the channel accommodating the filter element 24 is slightly inclined and is extended into the shorter side walls 16 of the ink reservoir.
  • the lower end of the channel 22 terminates in a blind hole or recess 28 in one of the side walls 16, whereas the other end of the channel is formed as a through-hole 30 penetrating the other side wall 16.
  • the opposite ends of the tubular filter element 24 are accommodated in the recess 28 and the through-hole 30, respectively, so that the total cross-section of the port 18 is completely blocked by the filter element, and the mesh of the filter element is in surface-to-surface engagement with the internal surfaces of the recess 28, the through-hole 30 and the portions of the side walls 14 defining the channel 22.
  • the ink liquid filled-in through the port 18 is forced to pass through the filter element 24 and is prevented from leaking around the filter element.
  • the through-hole 30 is closed by a plug 32.
  • a rod-like sensor element 34 is imbedded in the plug 32 and extends coaxially in the tubular filter element 24.
  • This sensor element 34 may for example serve as a level detector for detecting the level of the ink liquid in the ink reservoir or the port 18 thereof or, in case of a hot-melt ink jet device, as a temperature sensor for monitoring the temperature of the hot-melt ink.
  • the metal mesh forming the filter element 24 has a certain elasticity, and the tubular filter element, in its natural state, has a radius of curvature which is slightly larger than the one shown in Fig. 1.
  • the filter element When the filter element is mounted in the ink reservoir 10, it is slightly compressed in lateral direction in Fig. 1, so that the slit 26 becomes narrower and the filter element can be inserted into the channel 22 through the through-hole 30. Then, due to its own elasticity, the filter element 24 tends to flex back into its natural state, until its outer surface firmly engages the internal surfaces of the channel 22. The filter element 24 is then held in the channel 22 in a slightly compressed state. In this way, the filter element can be firmly secured in the ink reservoir 10 without the aid of any adhesive and without employing any other bonding techniques.
  • the assembly is completed by inserting the plug 32 with the sensor element 34.

Landscapes

  • Ink Jet (AREA)

Claims (10)

  1. Dispositif à jet d'encre comprenant un réservoir d'encre (10) et un élément de filtre (24) réalisé en une matière en forme de feuille présentant une forme courbe et disposé d'une manière étanche dans une ouverture (18) du réservoir d'encre, caractérisé en ce que l'élément de filtre (24) est introduit dans l'ouverture (18) dans un état déformé élastiquement et est maintenu en prise sur les parois (14) de cette ouverture du fait de ses forces de retour élastique.
  2. Dispositif à jet d'entre suivant la revendication 1, dans lequel l'élément de filtre (24) a une forme tubulaire.
  3. Dispositif à jet d'encre suivant la revendication 2, dans lequel l'élément de filtre tubulaire (24) comporte une fente longitudinale (26).
  4. Dispositif à jet d'encre suivant la revendication 2 ou 3, dans lequel l'ouverture (18) a une forme rectangulaire allongée et l'élément de filtre (24) s'étend parallèlement aux parois plus longues (14) de l'ouverture.
  5. Dispositif à jet d'encre suivant la revendication 4, dans lequel il est ménagé, dans les surfaces intérieures des parois plus longues (14) de l'ouverture (18), des parties en retrait se faisant face mutuellement et délimitant un conduit (22) dans lequel l'élément de filtre (24) est logé.
  6. Dispositif à jet d'encre suivant la revendication 4 ou 5, dans lequel des parties en retrait (28) et/ou des trous (30) sont ménagés dans les parois latérales plus courtes (16) de l'ouverture (18), et les extrémités opposées de l'élément de filtre (24) sont logées dans ces parties en retrait (28) ou trous (30).
  7. Dispositif à jet d'encre suivant la revendication 6, dans lequel l'un des trous (30) est réalisé sous forme d'un trou traversant qui traverse la paroi latérale (16) de l'ouverture (18) et l'extrémité extérieure de ce trou traversant (30) est fermée par un bouchon (32).
  8. Dispositif à jet d'encre suivant la revendication 7, dans lequel un élément de capteur (34) est placé dans le bouchon (32) et s'étend dans l'élément de filtre tubulaire (24).
  9. Dispositif à jet d'encre suivant l'une quelconque des revendications précédentes, dans lequel l'élément de filtre (24) est fait d'un tamis métallique ou d'un tissu de fibres métalliques.
  10. Dispositif à jet d'encre suivant l'une quelconque des revendications précédentes, adapté pour une utilisation avec une encre à l'état fondu.
EP19990200089 1998-01-23 1999-01-12 Dispositif à jet d'encre avec élément filtrant Expired - Lifetime EP0931658B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19990200089 EP0931658B1 (fr) 1998-01-23 1999-01-12 Dispositif à jet d'encre avec élément filtrant

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98200188 1998-01-23
EP98200188 1998-01-23
EP19990200089 EP0931658B1 (fr) 1998-01-23 1999-01-12 Dispositif à jet d'encre avec élément filtrant

Publications (2)

Publication Number Publication Date
EP0931658A1 EP0931658A1 (fr) 1999-07-28
EP0931658B1 true EP0931658B1 (fr) 2003-11-26

Family

ID=26149984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990200089 Expired - Lifetime EP0931658B1 (fr) 1998-01-23 1999-01-12 Dispositif à jet d'encre avec élément filtrant

Country Status (1)

Country Link
EP (1) EP0931658B1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933154A (ja) * 1982-08-19 1984-02-22 Canon Inc インクジエツト記録装置
JPH01133747A (ja) * 1987-11-20 1989-05-25 Canon Inc 液体噴射記録ヘッド
DE69118489T2 (de) * 1990-11-30 1996-08-14 Canon Kk Tintenbehälter und Aufzeichnungskopf mit einem solchen Behälter
US5477256A (en) * 1992-03-27 1995-12-19 Scitex Digital Printing, Inc. Ink mist filter
JP3148005B2 (ja) 1992-06-16 2001-03-19 キヤノン株式会社 記録カートリッジおよびインクジェット記録装置
DE69328714T2 (de) 1992-12-25 2000-12-28 Canon Kk Flüssigkeitstrahlkopf und Vorrichtung dafür
JP2537746B2 (ja) * 1993-05-10 1996-09-25 東京化工機株式会社 乾燥装置
US5537136A (en) 1993-12-07 1996-07-16 Lexmark International, Inc. Ink jet cartridge including filter inserts
JP3308751B2 (ja) * 1995-02-21 2002-07-29 キヤノン株式会社 インクタンク及びその製造方法
JPH08267778A (ja) * 1995-03-31 1996-10-15 Canon Inc インクタンク及び該インクタンクに対するフィルタの取付方法
JP3039358B2 (ja) * 1996-02-21 2000-05-08 富士ゼロックス株式会社 インク供給装置および記録装置

Also Published As

Publication number Publication date
EP0931658A1 (fr) 1999-07-28

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