EP0448578B1 - Dispositif de chauffage de l'encre dans la tete d'ecriture d'une imprimante a jet d'encre - Google Patents

Dispositif de chauffage de l'encre dans la tete d'ecriture d'une imprimante a jet d'encre Download PDF

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Publication number
EP0448578B1
EP0448578B1 EP90900098A EP90900098A EP0448578B1 EP 0448578 B1 EP0448578 B1 EP 0448578B1 EP 90900098 A EP90900098 A EP 90900098A EP 90900098 A EP90900098 A EP 90900098A EP 0448578 B1 EP0448578 B1 EP 0448578B1
Authority
EP
European Patent Office
Prior art keywords
ink
heating
coating
layer
heating 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 - Lifetime
Application number
EP90900098A
Other languages
German (de)
English (en)
Other versions
EP0448578A1 (fr
Inventor
Dietmar Pohlig
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0448578A1 publication Critical patent/EP0448578A1/fr
Application granted granted Critical
Publication of EP0448578B1 publication Critical patent/EP0448578B1/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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/14072—Electrical connections, e.g. details on electrodes, connecting the chip to the outside...
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/14153—Structures including a sensor
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14379—Edge shooter

Definitions

  • the invention relates to a heating device for heating the ink in the print head of an ink printing device according to the preamble of patent claim 1.
  • a known principle for the representation of characters on a recording medium is based on the fact that under the action of a control individual ink droplets are ejected from nozzles of a writing head which is part of an ink printing device. By coordinating the ejection of individual droplets and the relative movement between the recording medium and the writing head, characters and / or graphic patterns are thereby built up in a grid pattern on the recording medium.
  • the operational reliability and the quality of the recording depend to a large extent on the uniformity of the droplet ejection, ie the individual droplets ejected by a drive pulse must have a defined size and leave the nozzle of the print head at the same speed in each case.
  • the temperature of the ink in the print head can be brought to a certain value and maintained.
  • this results in relatively long heating-up times, particularly in the case of write heads with electrothermal converters.
  • measures for cooling must be provided for write heads with electrothermal transducers because of the heating of the ink that occurs during the writing operation.
  • the write head is usually arranged on a cooling surface, for example on an aluminum plate. If the ink has to be heated up after long pauses in writing or when the ink printing device is switched on, then the cooling surface must also be heated up as well. This results in relatively long heating times.
  • Another possible embodiment according to this document is to cover the electrothermal transducers with a preheating device with overlaying and to provide them with a temperature control device. In this way it is possible to react to changes in the environmental conditions.
  • the object of the invention is to provide a device for heating or for heating the ink for a print head in ink printing devices according to the preamble, with which the heating time is reduced, with which a reliable control with low control deviation is guaranteed, which also only requires little space Heating and, if necessary, sensor elements required and which can be produced and assembled with little effort.
  • the heating and sensor component is integrated in the write head structure.
  • the integration in the thin-layer structure allows the production of the complete print head in a single technology. This eliminates the need to provide and assemble your own heating and sensor elements and thus also additional soldering processes for the connecting lines of the individual components. Since the heating and sensor element are located in the immediate vicinity of the ink and the heating does not primarily cover the entire carrier, but the ink heats up immediately, resulting in short heating times. Further associated advantages are that the cooling surface of the write head can be increased if necessary, without the heating power for heating the ink having to be increased at the same time.
  • FIG. 1 shows in section a part of a writing head in which the energy for ejecting the ink droplets is generated by thermal energy.
  • print heads of this type are constructed using the so-called thin-film technology.
  • a resistance layer 3 acting as an electrothermal transducer element and the contacts 4 and 5 for this resistance layer 3 are applied to a substrate 1 as a carrier between a first covering layer 2 and a second covering layer 6.
  • the substrate 1 consists of silicon, the cover layers 2 and 6 made of silicon oxide (SiO2), the transducer element 3 made of hafnium boride (HfB2) and the contacts 4 and 5 made of aluminum (Al).
  • the structure is completed by a cover plate 7 such that a row of ink channels 8 and a common ink space 9 are formed between the top cover layer 6 and the cover plate 7.
  • An ink channel 8 is assigned to an outlet opening 10 of the write head.
  • the ink space 9 common to all ink channels 8 is connected to an ink supply, not shown here.
  • One transducer element 3 is assigned to an ink channel 8.
  • the connection is the Contacting 5 for each individual transducer element 3 individually, the connection for contacting 4 is provided for several or all transducer elements together.
  • the individual activation of a transducer element is associated with direct heating of the transducer element 3, which leads to the formation of an ink vapor bubble in the ink channel 8.
  • a defined volume of ink is displaced both into the ink space 9, that is to say towards the outlet opening 10, and is ejected there in the form of a single droplet.
  • a heating element in the form of a further thin-layer layer as the uppermost layer on the substrate 1 and thus in the greatest possible proximity to the ink in the ink space 9 is attached for heating the ink to a value at which the viscosity for the ejection process is optimal.
  • an electrically insulating protective layer 13 above it. This also ensures that electrically conductive ink liquids can also be used.
  • the protective layer 13 can be made of polyimide, for example.
  • FIG. 1 shows the layer structure of a write head, in which the heating and sensor layers are realized by a single thin-layer layer.
  • the heating layer is advantageously structured in a meandering manner. This achieves a sufficiently large electrical resistance that is matched to the voltage supply. For example, for a heating power of 5 W at a terminal voltage of 30 V, the resistance value can be 180 ohms.
  • the arrangement of the heating and sensor layer in the form of a meandering structure is shown in FIG. 2. In the example, the heating and sensor layer 14 extends over the entire ink space 9 into the individual ink channels 8.
  • the advantage is that because of the large temperature dependence of the electrical resistance of a heating layer made of nickel, the same layer can be used as a temperature sensor during the heating breaks. With such a construction concept, not only is an additional sensor component unnecessary, but the electrical supply lines for an additional sensor element are also eliminated.

Abstract

Dans une tête d'écriture à couches multiples, le dispositif de chauffage se compose d'une couche supplémentaire appliquée à la couche supérieure qui délimite le réservoir d'encre (9) et les canaux d'encre (8). Cette couche supplémentaire forme une couche de chauffage (11) et une couche de détection de la température (12) contactables toutes les deux de l'extérieur. La couche de chauffage (11) présente une large surface au niveau du réservoir d'encre (9), ayant de préférence une structure à méandres.

Claims (3)

  1. Dispositif de chauffage pour chauffer l'encre dans la tête d'impression d'un dispositif d'impression à encre comportant plusieurs canaux à encre (8) se terminant dans des ouvertures de sortie (10), canaux à encre (8) qui sont reliés à un espace d'encre commun (9), et des éléments transducteurs électrothermiques (3) pouvant être amorcés individuellement et associés à chaque canal à encre (8), sous l'activation desquels est obtenue une éjection de gouttelettes d'encre par les ouvertures de sortie (10), la tête d'impression étant réalisée en couches,
    caractérisé en ce que, sur la couche supérieure (2,3,4,5,6) d'un substrat (1), limitant l'espace d'encre (9) et les canaux à encre (8) et comportant les éléments transducteurs électrothermiques, est appliquée une autre couche (14) qui sert à la fois de couche de chauffage pour chauffer l'encre et de couche de détection de température pour détecter la température de l'encre, la couche (14) pouvant être contactée de l'extérieur et étant recouverte d'une couche de protection supplémentaire (13) et s'étendant sur une grande surface au niveau de la zone de l'espace d'encre (9).
  2. Dispositif de chauffage selon la revendication 1,
    caractérisé en ce que la couche (14) est réalisée en forme de méandres.
  3. Dispositif de chauffage selon la revendication 1,
    caractérisé en ce que la couche (14) est constituée d'un matériau dont la résistance dépend fortement de la température et en ce que la couche (14) sert de capteur de température pendant les pauses de chauffage.
EP90900098A 1988-12-14 1989-11-30 Dispositif de chauffage de l'encre dans la tete d'ecriture d'une imprimante a jet d'encre Expired - Lifetime EP0448578B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP88120856 1988-12-14
EP88120856 1988-12-14

Publications (2)

Publication Number Publication Date
EP0448578A1 EP0448578A1 (fr) 1991-10-02
EP0448578B1 true EP0448578B1 (fr) 1993-10-06

Family

ID=8199662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90900098A Expired - Lifetime EP0448578B1 (fr) 1988-12-14 1989-11-30 Dispositif de chauffage de l'encre dans la tete d'ecriture d'une imprimante a jet d'encre

Country Status (5)

Country Link
US (1) US5191360A (fr)
EP (1) EP0448578B1 (fr)
JP (1) JPH04506481A (fr)
DE (1) DE58905857D1 (fr)
WO (1) WO1990006851A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189989B1 (en) * 1993-04-12 2001-02-20 Canon Kabushiki Kaisha Embroidering using ink jet printing apparatus
EP0661157B1 (fr) * 1993-12-28 2001-05-09 Canon Kabushiki Kaisha Tête d'enregistrement à jet d'encre, appareil d'enregistrement par jet d'encre l'utilisant et méthode pour la fabrication de la tête.
US5901425A (en) 1996-08-27 1999-05-11 Topaz Technologies Inc. Inkjet print head apparatus
US6474769B1 (en) 1999-06-04 2002-11-05 Canon Kabushiki Kaisha Liquid discharge head, liquid discharge apparatus and method for manufacturing liquid discharge head
US8194254B2 (en) * 2007-01-30 2012-06-05 Hewlett-Packard Development Company, L.P. Print device preconditioning
JP5213367B2 (ja) * 2007-07-02 2013-06-19 キヤノン株式会社 インクジェット記録ヘッド
US20090033950A1 (en) * 2007-07-30 2009-02-05 Hewlett-Packard Development Printhead preconditioning trigger
JP4957452B2 (ja) * 2007-08-22 2012-06-20 ブラザー工業株式会社 液体移送装置
US8083323B2 (en) * 2008-09-29 2011-12-27 Xerox Corporation On-chip heater and thermistors for inkjet
JP2011207077A (ja) * 2010-03-30 2011-10-20 Seiko Epson Corp 液体噴射ヘッド、液体噴射ヘッドユニット及び液体噴射装置
JP5510244B2 (ja) * 2010-09-28 2014-06-04 セイコーエプソン株式会社 液体噴射ヘッド
JP6249682B2 (ja) * 2013-08-27 2017-12-20 キヤノン株式会社 液体吐出ヘッド用基板、液体吐出ヘッド、および、記録装置。
US20180171468A1 (en) * 2016-12-21 2018-06-21 Ncc Nano, Llc Method for deposting a functional material on a substrate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220757A (ja) * 1982-06-18 1983-12-22 Canon Inc 液体噴射記録装置
US4899180A (en) * 1988-04-29 1990-02-06 Xerox Corporation On chip heater element and temperature sensor
EP0561482B1 (fr) * 1988-10-31 1997-01-22 Canon Kabushiki Kaisha Tête d'enregistrement par jet de liquide et appareil équipé d'une telle tête
US4910528A (en) * 1989-01-10 1990-03-20 Hewlett-Packard Company Ink jet printer thermal control system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol.11, nr. 39 (M-559)(2486) 5 February 1987; JP-A-61 206657 *

Also Published As

Publication number Publication date
EP0448578A1 (fr) 1991-10-02
JPH04506481A (ja) 1992-11-12
DE58905857D1 (de) 1993-11-11
WO1990006851A1 (fr) 1990-06-28
US5191360A (en) 1993-03-02

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