EP0195863B1 - Thermischer Farbstrahldrucker - Google Patents

Thermischer Farbstrahldrucker Download PDF

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Publication number
EP0195863B1
EP0195863B1 EP19850302146 EP85302146A EP0195863B1 EP 0195863 B1 EP0195863 B1 EP 0195863B1 EP 19850302146 EP19850302146 EP 19850302146 EP 85302146 A EP85302146 A EP 85302146A EP 0195863 B1 EP0195863 B1 EP 0195863B1
Authority
EP
European Patent Office
Prior art keywords
thermal head
printer
ink
hole
recording medium
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
Application number
EP19850302146
Other languages
English (en)
French (fr)
Other versions
EP0195863A1 (de
Inventor
Keiichi Hori
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.)
Koki Holdings Co Ltd
Toshiba Corp
Fujitsu Ltd
Mitsubishi Electric Corp
Elm Co Ltd
Original Assignee
Toshiba Corp
Fujitsu Ltd
Mitsubishi Electric Corp
Elm Co Ltd
Hitachi Koki 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 Toshiba Corp, Fujitsu Ltd, Mitsubishi Electric Corp, Elm Co Ltd, Hitachi Koki Co Ltd filed Critical Toshiba Corp
Priority to DE8585302146T priority Critical patent/DE3573753D1/de
Priority to EP19850302146 priority patent/EP0195863B1/de
Publication of EP0195863A1 publication Critical patent/EP0195863A1/de
Application granted granted Critical
Publication of EP0195863B1 publication Critical patent/EP0195863B1/de
Expired 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
    • B41J2/14161—Structure having belt or drum with holes filled with ink

Definitions

  • the present invention relates to a thermal ink jet printer.
  • Non-impact printers include electronic photographic systems, electro static systems, thermal systems and ink jet systems.
  • Ink jet systems are very silent, have low power consumption and are small and compact.
  • ink jet systems have not become widely used. The main reason is due to plugging or stopping of the ink jet nozzle. Much research and development effort has been put into inks and nozzle shapes but trouble free operation of ink jet systems has not been achieved.
  • the present invention aims to eliminate the above noted difficulty and insufficiency, and to provide a new ink jet printing machine using a thermal head member.
  • thermo jet printer comprising an apertured member having at least one hole therein; means for introducing ink into the or each hole; at least one heating element, the or each said heating element being aligned or alignable with at least one said hole; means for mounting paper or other recording medium adjacent to the opposite surface of the apertured member; and means for energising the or a heating element when so aligned so as to cause the ink to be ejected from the respective said at least one hole and onto the recording medium as a result of bubble pressure caused by heat from said heating element.
  • the apertured member is a fixed member, and the heating is effected by a laser which is spaced from the apertured member.
  • the heating is effected by a laser which is spaced from the apertured member.
  • a thermal ink jet printer comprising an apertured member having at least one hole or recess therein; means for introducing ink into the or each hole or recess; at least one heating element, the or each said heating element being aligned or alignable with at least one said hole or recess; means for mounting paper or other recording medium adjacent to the opposite surface of the apertured member; and means for energising the or a heating element when so aligned so as to cause the inkto be ejected from the respective said at least one hole or recess and onto the recording medium as a result of bubble pressure caused by heat from said heating element, characterised in that the heating element is a thermal head element which is disposed in contact with one surface of the apertured member, the apertured member being a movably mounted member, and means being provided for moving the apertured member past the or each thermal head element.
  • the apertured member is an endless belt having a plurality of holes or recesses therein, the endless belt being arranged to receive inkfrom an ink tank.
  • the endless belt may be constituted by a film having holes or recesses therein each of which has a diameter of 10 to 200 pm.
  • the or each thermal head element may be arranged when so energised, to cause ink ejection from one hole or recess only or, alternatively, from a plurality of holes or recesses simultaneously.
  • thermal head elements which are arranged transversely of the recording medium, the energising means being arranged to energise selected thermal head elements.
  • each endless belt may have a portion disposed adjacent to recording medium, the said portions being arranged successively in a length direction or direction of travel of the recording medium, each said portion being provided with respective thermal head elements.
  • the or each endless belt may be mounted on rollers one of which is disposed within the respective ink tank.
  • each endless belt has a portion disposed adjacent the recording medium, the said portions being arranged successively in the breadth direction of the recording medium, each said portion being provided with a respective thermal head element.
  • each endless belt may be entrained around a respective sponge roller, which extends into a respective ink tank.
  • both line and serial printing may be achieved.
  • Use may if desired be made of a reciprocating sheet passing in front of a thermal head.
  • numeral 1 indicates a film of thin metal or heat resistant organic material such as polyimide; and numeral 2 indicates a plurality of hole or recess portions which may be shaped in or on said film 1, the diameter of each said hole or recess portion 2 typically being about 10 to 200 pm.
  • the diameter of the holes 2 is determined according to the thickness of the film 1 or the manner in which it is used.
  • Figures 2(a), 2(b), and 2(c) illustrate a basic principle of the present invention.
  • Recording ink 3 fills a plurality of hole or recess portions 2.
  • the hole or recess portions 2 are moved across the surface of a thermal head member 5 which has a plurality of thermal head elements 4.
  • the thermal head element 4 which is aligned with a hole or recess portion 2 is quickly heated by an applied electric current, whereby a bubble 6 is formed between the recording ink 3 in the respective hole or recess portion 2 and the thermal head element 4 of the thermal head member 5.
  • part or all of the recording ink in the said respective hole or recess portion 2 is spouted from the hole 2 by pressure from the bubble 6.
  • Each thermal head element 4 may be formed on the thermal head member 5.
  • the film 1 is completely in contact with the thermal head element 4, causing the bubble 6 to be enlarged toward the opened hole direction of said hole or recess portion 2, whereby the direction of ink ejection is precisely controlled.
  • one thermal head element 4 corresponds to one hole or recess portion 2 of the film 1 respectively.
  • Figures 4(a) and 4(b) show another embodiment of the present invention, in which one thermal head element 4 energizes a plurality of hole or recess portions 2.
  • the construction of Figures 4(a) and 4(b) has a higher reliability than the construction of Figures 1 to 3 from the standpoint of supplying an ink jet to a nozzle, whereby a mechanical construction for aligning a hole or recess portion 2 and the thermal head element 4 is not necessary and the construction is greatly simplified.
  • Several of the hole or recess portions 2 are definitely located on the thermal head element 4 at a given time and skips in recording are completely eliminated.
  • Figure 5 shows a monochrome type line printer.
  • the film 1 is an endless belt whose width is the full width of a page, for example A4 or A3 width.
  • a plurality of hole or recess portions 2 are shaped in or on the film 1.
  • the diameter of the hole or recess portions 2 depends on said film thickness. For example, the maximum diameter might be 50 pm in the case of a film thickness of 50 pm.
  • Numeral 8 indicates a recording ink
  • numeral 7 indicates an ink tank.
  • the film 1 is rotatably supported by a pair of rollers 9 and 15. Recording ink 8 is transferred into the hole or recess portions 2 when the film 1 passes through the ink tank 8 and is moved past the thermal head element 4 by rotation of the rollers 9 and 15.
  • a bubble (corresponding to the bubble 6 of Figure 2(b) and 2(c) may be caused between said thermal head element 4 and recording ink 8 by quickly heating the thermal head element 4 by electric voltage application thereto by means not shown, the thermal head element 4 being disposed in contact with one surface 1a of the film 1.
  • the recording ink 8 is therefore spouted or ejected from the holes 2 onto a recording paper 11 by the bubble pressure, whereby a character or image may be recorded on the paper 11, the latter being disposed adjacent to the opposite surface 1b of the film 1.
  • the thermal head member 5 of Figure 5 has a plurality of thermal head elements 4 extending in the breadth direction of the thermal head member 5 (i.e. transversely of the paper 11) and has a driving circuit (not shown) which drives or energises selected thermal head elements 4, whereby the driving circuit construction is simplified.
  • the recording paper 11 may be located on a platen 13 adjacent the hole or recess portions 2.
  • the recording paper 11 is supported by a pair of rollers 12 and 14 which are attached to the platen 13.
  • Numeral 10 indicates a blade to scrape off excess ink which adheres to the film 1 after passing through an ink tank 8.
  • Printing on the recording paper 11 is performed by selectively applying an electric voltage to the thermal head elements 4 from the driving circuit which may, for example, be constructed using an integrated circuit (not shown).
  • Figure 6 shows a construction for colour line printing function, a basic construction composed of a plurality of mechanisms for each colour source which may be basically similar to the monochrome mechanism of Figure 5.
  • a film 1y and a recording ink 8y are used for Yellow, a film 1m and a recording ink 8m are used for Magenta, a film 1c and a recording ink 8c for Cyan and a film 1blk and recording ink 8blk for Black.
  • the thermal head member 5 has a plurality of thermal head elements 4 (not shown in Figure 6) located behind each of the films 1y, 1m, Icand 1b/k.
  • the recording inks 8y, 8m, 8c and 8blk are selectively spouted or ejected from the films 1y, 1m, 1c and 1blk onto the recording paper 11 by driving the thermal head elements 4 according to a timing signal drom a driving circuit (not shown) while feeding the recording paper 11 in a coordinated manner. That is to say, the films 1y, 1m, 1e, 1blk have portions ld, 1e, 1f, 1q respectively which are arranged successively in a length direction or direction of travel of the paper 11, each portion 1d, 1e, 1f, 1g being provided with respective thermal head elements 4 (not shown in Figure 6).
  • Figure 7 shows a construction of a colour serial printing machine having films 1 ⁇ , 1m, 1 ⁇ and 1blk for Yellow, Magenta, Cyan and Black respectively; the films have a plurality of hole or recess portions 2 respectively.
  • the films 1y, 1m, 1c, 1blk respectively have portions 1h, 1j, 1k, 1 n disposed adjacent the paper 11 and arranged successively in the breadth direction of the latter.
  • Thermal head members 4y, 4m, 4c and 4blk for Yellow, Magenta, Cyan and Black have their thermal head elements aligned across the width of the films 1y, 1m, 1c and lblk respectively.
  • Ink supply sponge rollers 16y, 16m, 16c and 16blk supply the recording ink from the ink tanks 7y, 7m, 7c and 7blk to the films 1 ⁇ , 1m, 1c and 1blk.
  • Sponge rollers 16y, 16m, 16c and 16blk suck up the recording ink from said ink tanks 7y, 7m, 7c, and 7blk and fill the recording ink in the hole or recess portions 2 which contact and pass the surfaces of the sponge rollers 16y, 16m, 16c and 16blk.
  • Figure 8 shows a cross-sectional view of typical hole or recess portions 2 of the film 1.
  • a and c are tapered portions
  • b is a parallel portion
  • d is a recess portion.
  • the density of said hole or recess portions 2 in the film 1 is determined by both the recording density and thermal head element density.
  • the bubble pressure employed to spout the recording ink from the holes or recess portions to the recording paper is much higher than a conventional piezo electric element type ink jet nozzle.
  • the film employed is endless; however, the present invention is not limited in this construction. For example, it is possible to use another type of reciprocating film.
  • ink tank and film as a cassette type unit, which may be readily replaced as required.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
  • Electronic Switches (AREA)

Claims (11)

1. Thermischer Tintenstrahldrucker, welcher ein mit einer Öffnung versehenes Teil (1), das wenigstens eine Öffnung oder eine Ausnehmung (2) darin hat, eine Einrichtung (7) zum Einleiten der Tinte (8) in die oder jede Öffnung oder Ausnehmung (2), wenigstens ein Heizelement (4), wobei das oder jedes Heizelement (4) zu der wenigstens einen Öffnung oder Ausnehmung (2) fluchtet oder zu dieser in Flucht bringbar ist, eine Einrichtung (12, 13, 14) zum Lagern von Papier oder eines anderen Aufzeichnungsmediums (11) in der Nähe der gegenüberliegenden Fläche (1b) des mit der Öffnung versehenen Teils (1) und eine Einrichtung zum Erregen des oder der Heizelemente (4) aufweist, wenn diese ausgerichtet sind, um zu bewirken, daß die Tinte (8) aus der zugeordneten wenigstens einen Öffnung oder Ausnehmung (2) ausgespritzt und auf das Aufzeichnungsmedium (11) infolge des Blasendrucks aufgebracht wird, der durch die Wärme von dem Heizelement (4) erzeugt wird, dadurch gekennzeichnet, daß das Heizelement (4) ein thermisches Kopfelement ist, das in Kontakt mit einer Fläche (1a) des mit der Öffnung versehenen Teils (1) angeordnet ist, das mit der Öffnung versehene Teil (1) ein beweglich angeordnetes Teil ist, und die Einrichtung (9, 15) derart vorgesehen ist, daß das mit der Öffnung versehene Teil (1) an dem oder jedem thermischen Kopfelement (4) vorbeibewegt wird.
2. Drucker nach Anspruch 1, dadurch gekennzeichnet, daß das mit der Öffnung versehene Teil ein endloses Band (1) ist, das eine Mehrzahl von Öffnungen oder Ausnehmungen (2) darin hat, und daß das endlose Band (1) derart angeordnet ist, daß es die Tinte von einem Tintenbehälter (7) aufnimmt.
3. Drucker nach Anspruch 2, dadurch gekennzeichnet, daß das endlose Band von einer Folie (1) gebildet wird, die Öffnungen oder Ausnehmungen (2) darin hat, welche jeweils einen Druchmesser von 10 bis 200 pm haben.
4. Drucker nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das oder jedes thermische Kopfelement (4) bei der vorgesehenen Anordnung bewirkt, daß Tinte nur von einer Öffnung oder einer Ausnehmung (2) ausgespritzt wird.
5. Drucker nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das oder jedes thermische Kopfelement (4) bei der Erregung bewirkt, daß die Tinte aus einer Mehrzahl von Öffnungen oder Ausnehmungen (2) gleichzeitig ausgespritzt wird.
6. Drucker nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine Mehrzahl von thermischen Kopfelementen (4) vorgesehen ist, die in Querrichtung des Aufzeichnungsmediums (11) angeordnet sind, und daß die Erregungseinrichtung derart ausgelegt ist, daß ausgewählte thermische Kopfelemente (4) erregt werden.
7. Drucker nach Anspruch 2 oder 3 oder einem der Ansprüche 4 bis 6, wenn diese von Anspruch 2 oder 3 abhängig sind, dadurch gekennzeichnet, daß eine Mehrzahl von endlosen Bändern (1y, 1m, 1c, 1blk) und zugeordnete Tintenbehälter (8y, 8m, 8c, 8blk) vorgesehen sind, und daß die Tintenbehälter (8y, 8m, 8c, 8blk) derart ausgelegt sind, daß sie Tinten unterschiedlicher Farbe aufnehmen.
8. Drucker nach Anspruch 7, dadurch gekennzeichnet, daß jedes endlose Bande (1y, 1m, 1c, 1blk) einen Abschnitt (1d, 1e, 1f, 1g) hat, der in der Nähe des Aufzeichnungsmediums (11) angeordnet ist, daß die Abschnitte aufeinanderfolgend in einer Längsrichtung oder einer Bewegungsrichtung des Aufzeichnungsmediums (11) angeordnet sind, und daß jeder Abschnitt mit einem zugeordneten thermischen Kopfelement (4) versehen ist.
9. Drucker nach einem der Ansprüche 2, 3, 7 oder 8, dadurch gekennzeichnet, daß das oder jedes endlose Band auf Rollen (9, 15) angebracht ist, von denen eine (9) in dem zugeordneten Tintenbehälter (7) angeordnet ist.
10. Drucker nach Anspruch 7, dadurch gekennzeichnet, daß jedes endlose Band (1y, 1m, 1c, 1blk) einen Abschnitt (1h, 1j, 1k, 1n) hat, welcher in der Nähe des Aufzeichnungsmediums (11) angeordnet ist, daß die Abschnitte aufeinanderfolgend in Breitenrichtung des Aufzeichnungsmediums (11) angeordnet sind, und daß jeder Abschnitt mit einem zugeordneten thermischen Kopfelement (4y, 4m, 4c, 4blk) versehen ist.
11. Drucker nach Anspruch 10, dadurch gekennzeichnet, daß jedes endlose Band (1y, 1 m, 1c, 1blk) um eine zugeordnete Schwammwalze (16y, 16m, 16c, 16blk) läuft, welche sich in einen zugeordneten Tintenbehälter (7y, 7m, 7c, 7blk) erstreckt.
EP19850302146 1985-03-27 1985-03-27 Thermischer Farbstrahldrucker Expired EP0195863B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8585302146T DE3573753D1 (en) 1985-03-27 1985-03-27 Thermal ink jet printer
EP19850302146 EP0195863B1 (de) 1985-03-27 1985-03-27 Thermischer Farbstrahldrucker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19850302146 EP0195863B1 (de) 1985-03-27 1985-03-27 Thermischer Farbstrahldrucker

Publications (2)

Publication Number Publication Date
EP0195863A1 EP0195863A1 (de) 1986-10-01
EP0195863B1 true EP0195863B1 (de) 1989-10-18

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ID=8194181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850302146 Expired EP0195863B1 (de) 1985-03-27 1985-03-27 Thermischer Farbstrahldrucker

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EP (1) EP0195863B1 (de)
DE (1) DE3573753D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004631B1 (en) 2013-10-31 2015-04-14 Xerox Corporation Method and apparatus for accumulating excess ink in a stationary receptacle in imaging devices that form images on intermediate imaging surfaces

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220860A (ja) * 1985-03-28 1986-10-01 Toshiba Corp インクジエツト式記録装置
JPS62244645A (ja) * 1986-04-17 1987-10-26 Toshiba Corp 記録装置
US4797693A (en) * 1987-06-02 1989-01-10 Xerox Corporation Polychromatic acoustic ink printing
US4801953A (en) * 1987-06-02 1989-01-31 Xerox Corporation Perforated ink transports for acoustic ink printing
GB8714192D0 (en) * 1987-06-17 1987-07-22 Roneo Alcatel Ltd Franking machine
DE59404446D1 (de) * 1994-02-23 1997-11-27 Oce Printing Systems Gmbh Thermotransferdruckvorrichtung zur übertragung eines druckbildes auf einen aufzeichnungsträger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH495590A (de) * 1968-06-21 1970-08-31 Precisa Ag Verfahren zum Drucken von Zeichen und Vorrichtung zur Durchführung des Verfahrens
CH548866A (fr) * 1971-11-17 1974-05-15 Battelle Memorial Institute Dispositif d'impression avec une encre liquide, conductrice d'electricite.
US4117497A (en) * 1976-10-21 1978-09-26 International Business Machines Corporation Printing and displaying technology using selective laser beam pricking of liquid film for writing information
FR2448979B1 (fr) * 1979-02-16 1986-05-23 Havas Machines Dispositif destine a deposer sur un support des gouttes d'encre
US4561789A (en) * 1983-06-23 1985-12-31 Nippon Telegraph & Telephone Public Corp. Thermal ink transfer printing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004631B1 (en) 2013-10-31 2015-04-14 Xerox Corporation Method and apparatus for accumulating excess ink in a stationary receptacle in imaging devices that form images on intermediate imaging surfaces

Also Published As

Publication number Publication date
EP0195863A1 (de) 1986-10-01
DE3573753D1 (en) 1989-11-23

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