EP0327802A2 - Méthode pour équiper une tête à jet d'encre avec des cristaux piézo-électriques d'impression - Google Patents

Méthode pour équiper une tête à jet d'encre avec des cristaux piézo-électriques d'impression Download PDF

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Publication number
EP0327802A2
EP0327802A2 EP89100188A EP89100188A EP0327802A2 EP 0327802 A2 EP0327802 A2 EP 0327802A2 EP 89100188 A EP89100188 A EP 89100188A EP 89100188 A EP89100188 A EP 89100188A EP 0327802 A2 EP0327802 A2 EP 0327802A2
Authority
EP
European Patent Office
Prior art keywords
plate
piezoceramic
piezo
membrane
piezo crystals
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.)
Withdrawn
Application number
EP89100188A
Other languages
German (de)
English (en)
Other versions
EP0327802A3 (fr
Inventor
Fred Dipl.-Ing. Johannsen
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.)
AEG Olympia Office GmbH
Original Assignee
AEG Olympia AG
AEG Olympia Office GmbH
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 AEG Olympia AG, AEG Olympia Office GmbH filed Critical AEG Olympia AG
Publication of EP0327802A2 publication Critical patent/EP0327802A2/fr
Publication of EP0327802A3 publication Critical patent/EP0327802A3/fr
Withdrawn legal-status Critical Current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
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
    • 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
    • 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
    • B41J2002/14403—Structure thereof only for on-demand ink jet heads including a filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Definitions

  • the invention relates to a method for equipping an inkjet print head with piezo crystals of the type specified in the preamble of claim 1.
  • the membrane plate is connected to a one-piece piezoceramic plate which can be locally activated in a targeted manner on its surface in the area of the individual pressure chambers.
  • the piezoceramic plate has elevations with electrodes in the area of the individual fluid chambers.
  • the respective elevations of the piezoceramic plate have flat dimensions which correspond to the dimensions of the pressure chambers arranged below them in a base plate. If these dimensions are reduced, so that the density of the ink channels or pressure chambers present in the base body can be increased, there are strong influences on the vibration behavior of the piezoceramic elevations when the electrode layers are contacted by means of electrical wires.
  • piezoceramic plate is also easy to assemble, but it is very expensive to manufacture. Since the individual piezocrystals are also all still firmly connected to the piezoceramic plate, a correspondingly high voltage is required to generate the volume reduction in the pressure chambers.
  • the invention has for its object to provide a method for equipping an ink jet print head with piezo crystals, which can be carried out easily and quickly and thereby ensures a safe and accurate positioning of the piezo crystals.
  • This object is achieved by the invention characterized in claim 1.
  • the method according to the invention is characterized in that the piezocrystals are no longer individually adjusted and assembled, but that they are to be handled as one part during assembly. Only after the piezoceramic plate has been attached to the membrane plate is the final separation of the piezocrystals from the piezoceramic plate. Each piezo crystal is then arranged to swing freely.
  • the advantageous embodiment of the inventive method according to claim 8 eliminates the risk of incorrect polarity due to the asymmetrical shape of the piezo crystal plate.
  • the positioning of the piezoceramic plate flush with the membrane plate of the inkjet printhead eliminates any positioning problems.
  • FIG. 1 shows a plate-shaped base body 1 of an ink jet print head 2 shown in section, in which a plurality of pressure chambers 3 filled with ink and these with outlet openings 4 and ink channels 6, 7 connecting an ink supply chamber 5 are arranged. At the transition points of the ink channels 7 to the ink supply chamber 5, filters 8 are arranged, which prevent air from penetrating into the pressure chambers 3.
  • a membrane plate 9, which is also made of glass, can be firmly connected to the base body 1 and covers the pressure chambers 3, the ink channels 6, 7 and the storage chamber 5 in a liquid-tight manner.
  • the likewise plate-shaped membrane plate 9 is provided on the side to be connected with a piezoceramic plate 10 with a zinc oxide layer 13.
  • the piezoceramic plate 10 is, for. B. firmly connected to the membrane plate 9 by means of an adhesive connection. Thereafter, individual piezocrystals 11 are separated from the piezoceramic plate 10 by means of parting lines produced by a separating device and are thus free-swinging.
  • the separator can, for. B. from a laser beam device, e.g. B. consist of a CO2 laser.
  • This separating device has the advantage that the material to be removed from the separating joints is evaporated.
  • a laser beam device is e.g. B. can be controlled via a numerical control device such that any geometric shape of the piezo crystals 11 can be generated.
  • the piezocrystals 11 are attached to the membrane before they are attached to the piezoceramic plate 10 plate 9 is already separated from the piezoceramic plate (10) except for at least one connecting web 12. The final separation of the piezo crystals 11 then takes place after the piezoceramic plate 10 has been fastened to the membrane plate 9 by severing the connecting webs by means of a separating device.
  • the base body 1, the membrane plate 9 and the piezoceramic plate 10 partially have the same outer contour, such that they can be mounted flush and connected to one another. This has the advantage that a separate positioning of the individual crystals is no longer necessary.
  • the plate-shaped base body 11 and the membrane plate 9 z. B. firmly connected to each other by means of an adhesive connection.
  • the membrane plate 9 was still covered with an electrically conductive layer, e.g. B. provided a nickel oxide layer 13.
  • the piezoceramic plate 10 already provided with laser cuts is also firmly connected to the membrane plate 9 by means of an adhesive connection.
  • the connecting webs 12 are then severed in the parting lines by means of a laser beam device, as a result of which the piezo crystals 11 arranged above each pressure chamber 3 are separated from the piezoceramic plate 10 and thus vibrate freely. All piezocrystals 11 of the inkjet print head 2 are thus assembled as an assembly part and glued to the membrane plate 9. Good adhesive dosing is ensured by means of a squeegee, screen printing or a spin process. The assembly method according to the invention also ensures the flatness of the piezo crystals 11 to the membrane plate 9 required for the same operating voltages.
  • the pressure chambers 3 and the ink channels 6, 7 and the ink supply chamber 5 are e.g. B. incorporated into the base body 1 by an etching process.
  • the membrane plate 9 designed as a glass face plate can also be connected to the base body by a sintering process.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP89100188A 1988-02-11 1989-01-07 Méthode pour équiper une tête à jet d'encre avec des cristaux piézo-électriques d'impression Withdrawn EP0327802A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3804165 1988-02-11
DE3804165A DE3804165A1 (de) 1988-02-11 1988-02-11 Verfahren zum bestuecken eines tintenstrahldruckkopfes mit piezokristallen

Publications (2)

Publication Number Publication Date
EP0327802A2 true EP0327802A2 (fr) 1989-08-16
EP0327802A3 EP0327802A3 (fr) 1990-01-31

Family

ID=6347144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100188A Withdrawn EP0327802A3 (fr) 1988-02-11 1989-01-07 Méthode pour équiper une tête à jet d'encre avec des cristaux piézo-électriques d'impression

Country Status (4)

Country Link
US (1) US4897903A (fr)
EP (1) EP0327802A3 (fr)
JP (1) JPH024518A (fr)
DE (1) DE3804165A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713144A1 (fr) * 1993-11-30 1995-06-09 Rohm Co Ltd Tête d'impression à jets d'encre et imprimante la comportant.

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0714797B2 (ja) * 1990-11-30 1995-02-22 株式会社キトー 電動チェーンブロック
DE4225799A1 (de) * 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung
US5825382A (en) * 1992-07-31 1998-10-20 Francotyp-Postalia Ag & Co. Edge-shooter ink jet print head and method for its manufacture
US6050679A (en) * 1992-08-27 2000-04-18 Hitachi Koki Imaging Solutions, Inc. Ink jet printer transducer array with stacked or single flat plate element
DE59509149D1 (de) * 1994-08-03 2001-05-10 Francotyp Postalia Gmbh Anordnung für plattenförmige Piezoaktoren und Verfahren zu deren Herstellung
GB9808182D0 (en) * 1998-04-17 1998-06-17 The Technology Partnership Plc Liquid projection apparatus
DE19931110A1 (de) * 1999-07-06 2001-01-25 Ekra Eduard Kraft Gmbh Druckkopf zum Ausspritzen eines heißen flüssigen Mediums und Verfahren zur Herstellung einer metallisches Lot umfassenden Verbindungsstelle
US6464324B1 (en) 2000-01-31 2002-10-15 Picojet, Inc. Microfluid device and ultrasonic bonding process
US20060050109A1 (en) * 2000-01-31 2006-03-09 Le Hue P Low bonding temperature and pressure ultrasonic bonding process for making a microfluid device
USD514618S1 (en) 2002-09-12 2006-02-07 Seiko Epson Corporation Ink jet liquid injector
US7862678B2 (en) 2006-04-05 2011-01-04 Xerox Corporation Drop generator
WO2010036235A1 (fr) * 2008-09-23 2010-04-01 Hewlett-Packard Development Company, L.P. Suppression de matériau piézoélectrique à l’aide d’un rayonnement électromagnétique
US9139004B2 (en) * 2012-03-05 2015-09-22 Xerox Corporation Print head transducer dicing directly on diaphragm

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE349676B (fr) * 1971-01-11 1972-10-02 N Stemme
DE2256667C3 (de) * 1972-11-18 1975-04-30 Olympia Werke Ag, 2940 Wilhelmshaven Vorrichtung zum Erzeugen von Druckimpulsen, die in einem Grundkörper angeordnet sind
DE3234408C2 (de) * 1982-09-16 1986-01-09 Siemens AG, 1000 Berlin und 8000 München Schreibkopf mit piezoelektrischen Antriebselementen für Tintenschreibeinrichtungen
DE3342844A1 (de) * 1983-11-26 1985-06-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Mikroplanarer tintenstrahldruckkopf
DE3412531A1 (de) * 1984-04-04 1985-10-17 Olympia Werke Ag, 2940 Wilhelmshaven Tintendruckeinrichtung zum mehrfarbigen bedrucken eines aufzeichnungstraegers
US4605939A (en) * 1985-08-30 1986-08-12 Pitney Bowes Inc. Ink jet array
US4641153A (en) * 1985-09-03 1987-02-03 Pitney Bowes Inc. Notched piezo-electric transducer for an ink jet device
US4668964A (en) * 1985-11-04 1987-05-26 Ricoh Company, Ltd. Stimulator for inkjet printer
DE3608205A1 (de) * 1986-03-12 1987-09-17 Olympia Ag Piezoelektrisch betriebener schreibkopf fuer tintenmosaikschreibeinrichtungen
US4751774A (en) * 1986-08-29 1988-06-21 Dataproducts Corporation Method of fabricating an ink jet apparatus
US4768266A (en) * 1986-08-29 1988-09-06 Dataproducts Corporation Method of making an ink jet printer transducer array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713144A1 (fr) * 1993-11-30 1995-06-09 Rohm Co Ltd Tête d'impression à jets d'encre et imprimante la comportant.

Also Published As

Publication number Publication date
JPH024518A (ja) 1990-01-09
EP0327802A3 (fr) 1990-01-31
US4897903A (en) 1990-02-06
DE3804165A1 (de) 1989-08-24

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