EP1862315B1 - Cartouche d'encre - Google Patents

Cartouche d'encre Download PDF

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Publication number
EP1862315B1
EP1862315B1 EP07010664A EP07010664A EP1862315B1 EP 1862315 B1 EP1862315 B1 EP 1862315B1 EP 07010664 A EP07010664 A EP 07010664A EP 07010664 A EP07010664 A EP 07010664A EP 1862315 B1 EP1862315 B1 EP 1862315B1
Authority
EP
European Patent Office
Prior art keywords
ink
valve
valve body
valve seat
ink cartridge
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 - Fee Related
Application number
EP07010664A
Other languages
German (de)
English (en)
Other versions
EP1862315A3 (fr
EP1862315A2 (fr
Inventor
Ulf Reinhardt
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.)
Artech GmbH Design and Production in Plastic
Original Assignee
Artech GmbH Design and Production in Plastic
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 Artech GmbH Design and Production in Plastic filed Critical Artech GmbH Design and Production in Plastic
Publication of EP1862315A2 publication Critical patent/EP1862315A2/fr
Publication of EP1862315A3 publication Critical patent/EP1862315A3/fr
Application granted granted Critical
Publication of EP1862315B1 publication Critical patent/EP1862315B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J2/1752—Mounting within the printer
    • B41J2/17523—Ink connection
    • 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 comprising at least one ink tank having an ink outlet with an ink outlet opening extending from inside to outside, in which ink outlet port a differential pressure valve is mounted, which comprises a valve seat and a valve body movable relative thereto; the valve seat has a continuous valve opening having a peripheral sealing surface on the outside, spring means mounted between the movable valve body and the fixed ink outlet, one end against a fixed axial abutment (16) in the ink outlet port (4) and with the other End supported against the valve body (15), the valve body (15) is pressed against the sealing surface (11) of the valve seat (9) with a predetermined closing force by the spring device (17) and can be moved outward from the sealing surface (11) against the closing force.
  • Ink cartridges of the type mentioned serve as replaceable ink tanks for supplying ink to ink jet printing devices.
  • they have a housing, which is designed for attachment in a corresponding receptacle of a printer.
  • the housing of the ink cartridge are formed as an actual ink reservoir, a single or multiple ink containers, which may be filled with different inks.
  • Each ink container has an ink outlet port for detachable connection to an ink supply port of the printer. This will cause the printer to operate Ink supplied.
  • the empty ink cartridge can be easily removed from the receptacle and replaced with a full ink cartridge.
  • the empty ink cartridges are either disposed of or refilled with ink for reuse.
  • ink jet printers require that the ink be present at the ink outlet of the ink cartridge at a predetermined negative pressure level corresponding to the negative pressure that the printhead produces during operation at the ink supply port of the printer.
  • the negative pressure level must be kept within narrow limits: On the one hand, it must be ensured that the ink does not automatically leak out of the ink cartridge by gravity and disturb the function of the print head, on the other hand, the pressure level must not be so high that the print head is not inked can be sucked more.
  • Ink cartridges with differential pressure valves in the ink outlet are known in many designs, for example from the EP 238 829 B1 , Therein, a valve with a cap-shaped valve body is described, the spring-loaded on a sealing surface of the ink outlet from the outside sealingly sealing and the passage opening releases when the printhead falls below a predetermined negative pressure level on the outside of the differential pressure valve.
  • an elastic valve body has the advantage of a simple construction.
  • the disadvantage is that the production of an elastic valve body with the required accuracy of the elastic properties in large numbers is relatively expensive.
  • the properties of elastic materials change with time, so that the valve leaks or the pressure difference required to open becomes too high or too low.
  • the aforementioned problems can be compensated by the fact that the valve body is pressed by a spring element against a valve seat.
  • Such a concept is for example in the EP 709 207 B1 described.
  • the known design of the valve has the significant disadvantage that even a slight misalignment of the valve body relative to the sealing surface leads to functional problems.
  • this is the normal case, since the valve body is movable in the Tintenauslassö réelle and thereby inevitably has mechanical play.
  • the differential pressure valve may be leaking in the closed state, whereby the vacuum level at the ink outlet can not be maintained, thus ink escapes uncontrollably and malfunctions and damage to the printer can occur.
  • the invention is based on the motivation to provide an ink cartridge with a differential pressure valve which functions more reliably.
  • the valve body in the closed state should always rest optimally sealingly against the sealing surface.
  • the invention proposes that the valve seat (9) has a hinge portion (14) on which the sealing surface (11) relative to the Tintenauslassö réelle (4) is arranged tiltable.
  • the sealing surface is not firmly fixed in the ink outlet opening, but movable within the ink outlet, namely tiltable.
  • valve seat is formed deformable, for example as an elastic rubber molding. This can already be designed by a simple shape, for example, as a pipe section in itself flexible elastic.
  • a further advantage is that the sealing surface can tilt laterally. This can be realized for example by a kind of tilting joint, which is formed by a circumferential indentation in a tubular portion of the valve seat. This can be compensated for any tilting of the valve body in the ink outlet.
  • the valve body is in the closed state always optimally sealing to the sealing surface.
  • An advantageous embodiment of the invention provides that the sealing surface is movable in the longitudinal direction of the Tintenauslassö réelle. Such axial mobility can be achieved, for example, by a bellows-type compensating piece, so that the sealing surface can be moved in the longitudinal direction of the ink outlet opening.
  • the valve seat initially stretches outwardly during the suction of the printer before the valve body lifts off from the sealing surface. As a result, first gradually builds negative pressure, which undesirable valve flutter is suppressed.
  • the differential pressure valve according to the invention consequently has a particularly favorable response.
  • the retraction of the valve seat prevents ink run-off or dripping when the printer stops sucking or the ink cartridge is removed from the printer. As a result, the handling and reliability is increased.
  • the sealing surface is conically shaped.
  • Spherical valve bodies can seal particularly well in the inner cone thus formed.
  • a cone-shaped, circumferential sealing lip can be formed, which achieves a good sealing effect on even and spherical-spherical mating surfaces even at low sealing forces.
  • the valve body may have a crowned sealing surface which is formed on the end face of a substantially cylindrical body.
  • the sealing surface may be flat, conical or otherwise shaped.
  • the valve seat is formed as an elastomeric molded part, for example made of rubber or a thermoplastic elastomer.
  • an inventive mobility of the valve seat can be realized well.
  • the valve seat has a fitting which allows easy connection to the ink outlet port.
  • the fitting may for example be formed by a pipe section which is mounted on a corresponding coupling part, for example, is fitted tightly onto a formed on the Tintenauslassö réelle connecting piece.
  • the spring means may comprise a compression spring which is supported at one end against a fixed axial abutment in the Tintenauslassö réelle and at the other end against the valve body.
  • the spring means comprises a first permanent magnet mounted on the valve body and a second permanent magnet fixedly mounted relative to the valve opening in the ink outlet port, opposite to the first permanent magnet, so that the repulsive force is between the first and second Permanent magnet acting as a closing force on the valve body.
  • the valve force with which the valve body is pressed against the sealing surface is thus alternatively produced by a mechanical spring element or by magnetic repulsion.
  • the repulsive magnetic force can be realized in that first and second magnetic elements are attached to the movable valve body and the abutment fixed relative to the sealing surface.
  • the magnetic elements face each other with the same magnetic poles, ie north-north or south-south, whereby a magnetic force acts, which is directed outwards with respect to a connecting line of the two Magente.
  • the magnetic transmission of the closing force on the valve body is non-contact. This makes it possible to first individually produce the valve body with the first magnet and the housing with the second magnet and then assemble together without mechanical connection and thus particularly easy to the differential pressure valve. In addition, other potential mechanical problems that might arise from the use of conventional springs, such as friction, tilting, contamination, etc., are eliminated.
  • Another advantage is that permanent magnets can be produced cheaply in high quantities with close tolerances in terms of their magnetic and mechanical properties, for example by sintering. As a result, the response of the inventive differential pressure valve can be specified accordingly.
  • magnets made of hard magnetic materials with high remanence and permeability By using permanent magnets made of hard magnetic materials with high remanence and permeability, magnets with small dimensions can be used which retain their magnetization over a long period of time. Accordingly, the closing force remains constant and the function of the valve is ensured in the long term.
  • the pole axes of the permanent magnets are aligned coaxially.
  • the first and second permanent magnets with the same magnetic poles are axially opposite each other with respect to the connecting line, the radial orientation having no influence.
  • the production is simplified and there are no unwanted torques on the magnets.
  • the permanent magnets are disc-shaped.
  • the magnets are shaped as cylindrical disks with an axial magnetization direction. These are simply arranged axially above one another on the valve body and a fixed abutment in the housing of the ink cartridge.
  • the permanent magnets may be cuboid or annular - or in different dimensions - be configured, to achieve an optimization of the closing force or an adaptation to the housing, for example, to simplify the assembly.
  • An advantageous embodiment of the invention provides that the valve body and / or attached thereto first permanent magnet is guided on a guide in the direction of movement.
  • a mechanical guide of the valve body can be formed for example by guide rods or rails and corresponding openings in the valve body and in the housing. This ensures that the valve body sits securely and accurately on the valve opening.
  • the first and second permanent magnets form a self-centering magnetic bearing.
  • a magnetic bearing can be formed, for example, by one of the permanent magnets being an axially magnetized ring which fixes the second magnet radially. In this way, a contact-free centering of the valve body can be realized relative to the valve opening.
  • the permanent magnets are suitably coated with plastic. As a result, the magnets do not come into contact with the ink and are thus reliably protected against corrosion.
  • the first magnet is injected into the formed as a plastic injection molded part valve body and the second magnet in the also made of plastic housing of the ink cartridge.
  • the ink cartridge may include one or more ink containers.
  • the ink containers may be formed as chambers within the housing or as separate bags or the like, which are inserted into the housing. Each individual of these ink containers may be provided with a differential pressure valve according to the invention.
  • Fig.1 an ink cartridge is shown schematically in section and provided with the reference numeral 1 as a whole.
  • the ink cartridge 1 has a substantially box-shaped ink tank 2 having a lid 2a, side walls 2b, and a bottom 2c. Through the bottom 2c and a tubular ink outlet 3 attached to the outside thereof, an ink outlet port 4 extends from inside to outside.
  • the ink cartridge 1 is filled to level F with free-flowing ink.
  • a ventilation opening 5 which connects the ink-filled interior of the ink tank 2 with the environment and ensures that ambient air flows into the ink tank 2 when ink is removed through the ink outlet 3.
  • a sealing element 6 is inserted, through which a hollow ink removal needle for supplying ink to an ink jet printer not shown in detail for the removal of ink to the ink outlet 3 can be connected.
  • the sealing element 6 may be, for example, an elastic sealing ring or a pierceable septum.
  • a differential pressure valve 8 is arranged in the ink outlet 4 of the ink outlet 3. This valve 8 is for better explanation in Fig.2 shown enlarged again.
  • the differential pressure valve 8 has a valve seat 9 with a continuous valve opening 10.
  • the valve seat 9 On the outside, in the drawing below, the valve seat 9 has a conical sealing surface 11 which extends around the valve opening and widens outwards.
  • a tubular connecting piece 12 is formed, which is integrally formed on one of the ink outlet 4 Outlet 13 is plugged.
  • a circumferential indentation 14 Between the sealing surface 11 and the connecting piece 12 of the valve seat 9 is formed with a circumferential indentation 14, ie a bellows-like bead.
  • valve seat 9 is in Figure 3 again enlarged to clarify the details. It is also clearly visible how the sealing surface 11 is formed on the cone-shaped outlet-expiring valve seat 9, so that a circumferential, resilient sealing lip is formed.
  • the curved double arrow indicates how the sealing surface 11 can be tilted laterally about a pivot point located within the indentation 14; the upward and downward double arrow indicates the axial mobility.
  • the closing force acting on the valve body 15 is generated by a spring device, which is supported on a fixed abutment 16 in the ink outlet 3.
  • the spring device can be realized in that between the valve body 15 and abutment 16 a - shown here - compression spring 17 is used, or alternatively, the valve body 15 and the abutment 16 are equipped with mutually repelling magnets.
  • the valve body 15 has a spherically shaped sealing side (in the drawing above), which is pressed by the spring device against the sealing surface 11. This closes the valve opening 10, i. when idle, no ink flows through the ink outlet port 4 to the printer.
  • the printer sucks ink with a certain negative pressure through the ink removal needle, which is sealingly inserted into the sealing element 6 in the outlet of the ink outlet 3.
  • a differential pressure is applied to the interior of the ink tank 2 at the differential pressure valve 8 and thus generates an opening force (directed downwards in the drawing) on the valve body 11 which lifts it against the closing surface 11 of the valve seat 9, counter to the closing force exerted by the spring device. so that now ink through the Differential pressure valve 8 can flow. If no negative pressure is applied to the outlet, and the pressure difference is eliminated and the differential pressure valve 8 closes.
  • the acting closing force is determined by the spring means so that on the one hand, the differential pressure valve 8 is tightly closed when a full ink cartridge 1 from above one of the height of the ink tank 2 corresponding liquid column is pending, and on the other hand, the differential pressure valve 8 opens reliably when a printer at the output of the ink outlet 3 sucks ink.
  • An advantage of the invention results from the fact that the sealing surface 11 is movable relative to the fitting 12 of the valve seat 9 fixedly mounted in the ink outlet opening 4.
  • the valve seat 9 is formed deformable, for example as an elastic rubber molding.
  • the indentation 14 forms a type of tilting joint, around which the sealing surface 11 can tilt laterally, and moreover a bellows-like compensating piece, so that the sealing surface is movable in the longitudinal direction of the ink outlet opening 4.
  • valve seat 9 initially stretches outwardly when the printer is sucked in, before the valve body 9 lifts off from the sealing surface 11. As a result, first gradually builds on negative pressure, whereby valve flutter is suppressed.
  • the differential pressure valve 8 according to the invention consequently has a particularly favorable response.
  • retraction or dripping of ink is prevented by the retraction of the valve seat 9 when the printer is no longer sucked or the ink cartridge 1 is taken out of the printer.

Landscapes

  • Ink Jet (AREA)

Claims (9)

  1. Cartouche d'encre (1), qui comporte au moins un réservoir d'encre (2),
    - qui présente une sortie d'encre (3) avec un orifice de sortie d'encre (4) qui s'étend de l'intérieur vers l'extérieur,
    - dans l'orifice de sortie d'encre (4) est installée une soupape à pression différentielle (8), qui comprend un siège de soupape (9) et un corps de soupape (15) mobile par rapport à celui-ci,
    - le siège de soupape (9) présente un orifice de soupape continu (10), qui présente extérieurement une face d'étanchéité périphérique (11),
    - un système de ressort (17) est installé entre le corps de soupape mobile (9, 15) et la sortie d'encre fixe (3), qui prend appui par une extrémité contre un appui axial fixe (16) dans l'orifice de sortie d'encre (4) et par l'autre extrémité contre le corps de soupape (15),
    - le corps de soupape (15) est pressé par le système de ressort (17), avec une force de fermeture prédéterminée, de façon étanche par l'extérieur contre la face d'étanchéité (11) du siège de soupape (9) et est mobile vers l'extérieur à partir de la face d'étanchéité (11) contre la force de fermeture,
    - dans laquelle le siège de soupape (9) est déformable, de telle manière que la face d'étanchéité (11) soit mobile par rapport à l'orifice de sortie d'encre,
    caractérisée en ce que le siège de soupape (9) présente une partie articulée (14), sur laquelle la face d'étanchéité (11) est disposée de façon basculante par rapport à l'orifice de sortie d'encre (4).
  2. Cartouche d'encre selon la revendication 1, caractérisée en ce que la face d'étanchéité (11) est mobile dans la direction longitudinale de l'orifice de sortie d'encre (4).
  3. Cartouche d'encre selon la revendication 1, caractérisée en ce que le siège de soupape (9) présente une partie tubulaire avec au moins une gorge périphérique (14).
  4. Cartouche d'encre selon la revendication 1, caractérisée en ce que la face d'étanchéité (11) est de forme conique.
  5. Cartouche d'encre selon la revendication 1, caractérisée en ce que le corps de soupape (15) est de forme sphérique.
  6. Cartouche d'encre selon la revendication 1, caractérisée en ce que le siège de soupape (9) se présente sous la forme d'une pièce moulée en élastomère.
  7. Cartouche d'encre selon la revendication 1, caractérisée en ce que le siège de soupape (9) présente une pièce de raccordement (12) à son extrémité intérieure.
  8. Cartouche d'encre selon la revendication 7, caractérisée en ce que la pièce de raccordement (12) du siège de soupape (9) est assemblée à une partie de couplage (13) du réservoir d'encre (2).
  9. Cartouche d'encre selon la revendication 1, caractérisée en ce que le système de ressort comprend un premier aimant permanent, qui est placé sur le corps de soupape (15), et un deuxième aimant permanent (16), qui est placé dans l'orifice de sortie d'encre (4) en position fixe par rapport à la face d'étanchéité (11), qui est disposé de façon homopolaire par rapport au premier aimant permanent, de telle manière que la force de répulsion entre le premier et le deuxième aimants permanents fasse fonction de force de fermeture sur le corps de soupape (15).
EP07010664A 2006-06-02 2007-05-30 Cartouche d'encre Expired - Fee Related EP1862315B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006026258A DE102006026258A1 (de) 2006-06-02 2006-06-02 Tintenkartusche

Publications (3)

Publication Number Publication Date
EP1862315A2 EP1862315A2 (fr) 2007-12-05
EP1862315A3 EP1862315A3 (fr) 2008-07-30
EP1862315B1 true EP1862315B1 (fr) 2010-09-15

Family

ID=38616294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07010664A Expired - Fee Related EP1862315B1 (fr) 2006-06-02 2007-05-30 Cartouche d'encre

Country Status (3)

Country Link
US (1) US7845780B2 (fr)
EP (1) EP1862315B1 (fr)
DE (2) DE102006026258A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201685529U (zh) * 2010-05-12 2010-12-29 珠海纳思达企业管理有限公司 墨盒填充装置
JP6327015B2 (ja) * 2014-06-27 2018-05-23 ブラザー工業株式会社 液体カートリッジ及び液体カートリッジのキャップ取付方法
JP2016022704A (ja) * 2014-07-23 2016-02-08 セイコーエプソン株式会社 液体噴射装置及びその製造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677447A (en) 1986-03-20 1987-06-30 Hewlett-Packard Company Ink jet printhead having a preloaded check valve
US5040002A (en) * 1990-03-16 1991-08-13 Hewlett-Packard Company Regulator for ink-jet pens
JPH08174860A (ja) 1994-10-26 1996-07-09 Seiko Epson Corp インクジェットプリンタ用インクカートリッジ
JPH08285125A (ja) * 1995-04-12 1996-11-01 Koganei Corp 弁装置および弁装置を有する薬液供給装置
JPH10138507A (ja) * 1996-11-14 1998-05-26 Seiko Epson Corp インクジェット式記録装置用インクカートリッジの製造方法
SG95609A1 (en) * 1998-11-11 2003-04-23 Seiko Epson Corp Ink-jet printing apparatus and ink cartridge
ATE465879T1 (de) * 2003-03-05 2010-05-15 Seiko Epson Corp Verfahren zur herstellung eines flüssigkeitsbehälters
DE102005029588A1 (de) * 2005-06-25 2007-01-04 Artech Gmbh Design + Production In Plastic Tintenkartusche

Also Published As

Publication number Publication date
EP1862315A3 (fr) 2008-07-30
US7845780B2 (en) 2010-12-07
DE102006026258A1 (de) 2007-12-06
DE502007005019D1 (de) 2010-10-28
US20070279463A1 (en) 2007-12-06
EP1862315A2 (fr) 2007-12-05

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