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EP0691205A2 - Tête d'impression par jet d'encre modulaire - Google Patents

Tête d'impression par jet d'encre modulaire Download PDF

Info

Publication number
EP0691205A2
EP0691205A2 EP95250145A EP95250145A EP0691205A2 EP 0691205 A2 EP0691205 A2 EP 0691205A2 EP 95250145 A EP95250145 A EP 95250145A EP 95250145 A EP95250145 A EP 95250145A EP 0691205 A2 EP0691205 A2 EP 0691205A2
Authority
EP
European Patent Office
Prior art keywords
ink
plate
openings
nozzle
print head
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.)
Granted
Application number
EP95250145A
Other languages
German (de)
English (en)
Other versions
EP0691205A3 (fr
EP0691205B1 (fr
Inventor
Harald Windel
Junming Dr. Zhang
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.)
Francotyp Postalia GmbH
Original Assignee
Francotyp Postalia 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 Francotyp Postalia GmbH filed Critical Francotyp Postalia GmbH
Publication of EP0691205A2 publication Critical patent/EP0691205A2/fr
Publication of EP0691205A3 publication Critical patent/EP0691205A3/fr
Application granted granted Critical
Publication of EP0691205B1 publication Critical patent/EP0691205B1/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
    • B41J2/14201—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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/19—Assembling head units

Definitions

  • the invention relates to an ink print head which is composed of ink print modules which operate according to the edge shooter principle and are preferably equipped with piezoelectric actuators.
  • the inkjet print head is intended for use in small, fast printers, which in turn are part of modern machines for franking mail or for printing addresses.
  • printing is carried out as a single franking imprint in one pass of the postal matter.
  • the print width determines the number of nozzles to be arranged one below the other and thus a dimension of the ink print head.
  • the convenience offered by franking machines includes clichés with word and Pictogram. Print resolutions of approximately 200 dpi are required to ensure good print quality. This requires nozzle openings of 40 to 50 ⁇ m in width. With a customary cliché width of one inch, this places high demands on the accuracy of the nozzle division and its control; the adjustment error must be kept below 10 ⁇ m.
  • An ink print head of the type described at the outset is known, DE 42 25 799 A1, which consists of several different modules, of which only one of the modules carries the common row of nozzles on its end face. All modules have pressure chambers for ink ejection that can be driven by piezo actuators and are connected to the associated nozzles via correspondingly guided channels. The connection channels from module to module are inevitably orthogonal to the pressure chambers.
  • a higher accuracy than that for the pressure chambers and a higher adjustment effort are required for the connecting channels running through several modules.
  • the connecting channels of different lengths require additional tax measures. If the nozzles are made from UV-sensitive glass together with the ink channels using the etching technique, they consequently have a hydrodynamically disadvantageous rectangular cross-section, which in practice can only be produced with an accuracy of greater than or equal to 5 ⁇ m.
  • the channel plate has ink supply channels into which the ink channels open on one side and which form outlet openings on the other side, which are connected to associated nozzle openings of the nozzle plate.
  • the purpose of the invention is to reduce the manufacturing effort while maintaining the required printing accuracy.
  • the invention has for its object to provide an ink print head of the type mentioned, which consists of identical ink pressure modules with plate-shaped piezoelectric actuators and in which the channels from the pressure chambers to the nozzles are approximately the same length and adjacent pressure chambers are acoustically decoupled.
  • this object is the Claims resolved.
  • Both the adapter plate and the nozzle plate can be manufactured with high precision using the lithography technique.
  • the openings in the adapter plate and the nozzle openings in the nozzle plate can be produced in the same way by means of etching, laser drilling, sandblasting or LIGA technology. If the plates were made of steel, punching would still be possible. Only the thickness of the nozzle plate is decisive for the nozzle length, so that all nozzles are of the same length.
  • the dimensions of the openings in the adapter plate can be dimensioned such that there are ink paths of approximately the same length.
  • the problem of pressure resolution and the accuracy of the nozzle division (equidistance) and nozzle shape is away from the modules in the combination moved from adapter and nozzle plate and can be mastered here with ease using the lithography technique.
  • the proposed construction of the ink printing modules from the first cover plate, intermediate plate, second cover plate and spacer plate makes it possible to mold the ink chambers either into the cover plate or into the intermediate plate. Both the offset of the ink chambers on both sides of the intermediate plate to the gap as well as the spacer plate result in a good acoustic decoupling within a module and between the modules.
  • the spacer plate is expediently provided with recesses for the piezo actuators and their connecting lines.
  • connection between the nozzle and adapter plate and between the latter and the module front surface can take place by means of a UV-activatable adhesive which has previously been applied using lithography technology.
  • the ink print head of n 4 identical ink printing modules 1 assembled.
  • the ink printing modules 1 are arranged in alignment next to one another and their ink chambers 16, 17 are open to the common front side.
  • an adapter plate 2 bears against it.
  • the adapter plate 2 is provided with openings 21, 22 corresponding to the number of ink chambers 16, 17.
  • a nozzle plate 3 with nozzle openings 31 is arranged which is adapted to this.
  • the openings 21, 22 in the adapter plate 2 are adapted on the one hand in a region of the width D of the ink chambers 16, 17 and are flush with them.
  • the openings 21, 22 are adapted to the diameter d of the nozzle openings 31 and are also in alignment here.
  • An ink printing module consists of a first cover plate 11, an intermediate plate 12 and a second cover plate 13 and a spacer plate 14.
  • 12 ink chambers 16 are arranged one below the other between the first cover plate 11 and the intermediate plate.
  • 12 ink chambers 17 are arranged between the second cover plate 13 and the intermediate plate.
  • the ink chambers 17 are, however, offset from the ink chambers 16 by approximately one ink chamber width, so that they are in a gap with each other.
  • the cover plates 11, 13 carry piezo actuators 15 on their side facing away from the intermediate plate 12 in the areas which are adjacent to the ink chambers 16, 17.
  • the piezo actuators 15 are controlled via lines (not shown).
  • the ink chambers 16, 17 can either be molded into the cover plates 11, 13, as shown, or into the intermediate plate 12.
  • the nozzle openings 31 are arranged equidistantly from one another in each column.
  • the nozzles are displaced from column to column in such a way that no nozzle opening 31 is aligned orthogonally to the column direction, but all nozzle openings 31 are arranged equidistantly in the column direction of the ink print head.
  • the columns of the openings 21, 22 assigned to an ink printing module 1 are arranged in pairs to one another in such a way that the openings 21, 22, with their smaller area adapted to the nozzles 31, are aligned with one another in an interlocking manner and are arranged equidistantly from one another.
  • the openings 21, 22 are approximately kidney-shaped, while the nozzle openings 31 are circular.
  • a pressure pulse emitted by a piezo actuator 15 causes the ink chamber 16 to shrink, as a result of which ink is pressed out of the ink chamber opening through the opening 21 to the nozzle 31 and leaves the nozzle opening 31 as an ink drop.
  • the ink flow direction is redirected according to the distance from the center of the ink chamber opening 16 to the center line of the intermediate plate 12. If the ink chambers 16, 17 were molded into the intermediate plate 12, the deflection would be shortened accordingly.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
EP95250145A 1994-07-05 1995-06-16 Tête d'impression par jet d'encre modulaire Expired - Lifetime EP0691205B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4424771 1994-07-05
DE4424771A DE4424771C1 (de) 1994-07-05 1994-07-05 Tintendruckkopf aus einzelnen Tintendruckmodulen

Publications (3)

Publication Number Publication Date
EP0691205A2 true EP0691205A2 (fr) 1996-01-10
EP0691205A3 EP0691205A3 (fr) 1996-03-20
EP0691205B1 EP0691205B1 (fr) 1998-09-09

Family

ID=6523082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250145A Expired - Lifetime EP0691205B1 (fr) 1994-07-05 1995-06-16 Tête d'impression par jet d'encre modulaire

Country Status (3)

Country Link
US (1) US6367911B1 (fr)
EP (1) EP0691205B1 (fr)
DE (2) DE4424771C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011461A1 (fr) * 1997-08-29 1999-03-11 Topaz Technologies, Inc. Ensemble tete integree pour imprimante a jet d'encre

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705089C1 (de) * 1997-02-01 1998-03-26 Francotyp Postalia Gmbh Anordnung zur Ablage von Aufzeichnungsträgern
DE19706376C1 (de) * 1997-02-19 1998-03-12 Francotyp Postalia Gmbh Schutzvorrichtung für eine Frankiermaschine
DE19712077C1 (de) * 1997-03-11 1998-04-02 Francotyp Postalia Gmbh Anordnung zum Bedrucken streifenförmiger Druckträger
DE19726642C1 (de) * 1997-06-18 1998-09-03 Francotyp Postalia Gmbh Vorrichtung zur Positionierung eines Tintendruckkopfes und einer Reinigungs- und Dichtvorrichtung
DE19726643C1 (de) 1997-06-18 1998-07-23 Francotyp Postalia Gmbh Vorrichtung zur Reinigung eines Tintendruckkopfes
US7785098B1 (en) 2001-06-05 2010-08-31 Mikro Systems, Inc. Systems for large area micro mechanical systems
US7410606B2 (en) 2001-06-05 2008-08-12 Appleby Michael P Methods for manufacturing three-dimensional devices and devices created thereby
US7141812B2 (en) * 2002-06-05 2006-11-28 Mikro Systems, Inc. Devices, methods, and systems involving castings
US6890067B2 (en) * 2003-07-03 2005-05-10 Hewlett-Packard Development Company, L.P. Fluid ejection assembly
US20050206679A1 (en) * 2003-07-03 2005-09-22 Rio Rivas Fluid ejection assembly
GB0404231D0 (en) * 2004-02-26 2004-03-31 Xaar Technology Ltd Droplet deposition apparatus
US7540593B2 (en) * 2005-04-26 2009-06-02 Hewlett-Packard Development Company, L.P. Fluid ejection assembly
US7380914B2 (en) * 2005-04-26 2008-06-03 Hewlett-Packard Development Company, L.P. Fluid ejection assembly
DE102005052150B4 (de) * 2005-11-02 2007-09-20 Francotyp-Postalia Gmbh Vorrichtung zur Reinigung eines Tintendruckkopfes
US20070236537A1 (en) * 2006-03-29 2007-10-11 Picosys Inc. Fluid jet print module
DE102006023540A1 (de) * 2006-05-19 2007-11-22 Francotyp-Postalia Gmbh Verfahren zum Freispritzen der Düsen eines Tintendruckkopfes
DE102006023542B3 (de) * 2006-05-19 2007-10-25 Francotyp-Postalia Gmbh Verfahren zum Freispritzen der Düsen eines Tintendruckkopfes
DE102006034611B4 (de) 2006-07-21 2010-09-09 Francotyp-Postalia Gmbh Anordnung zum Auswechseln von Tintendruckmodulen
DE102007057819A1 (de) * 2007-11-30 2009-06-04 Francotyp-Postalia Gmbh Vorrichtung zum Reinhalten eines Tintendruckkopfes
DE102008033052A1 (de) * 2008-07-14 2010-01-28 Francotyp-Postalia Gmbh Anordnung zum Auswechseln von Tintendruckmodulen
WO2010036801A2 (fr) * 2008-09-26 2010-04-01 Michael Appleby Systèmes, dispositifs et/ou procédés pour fabriquer des moulages par coulée
US8721042B2 (en) * 2011-07-27 2014-05-13 Eastman Kodak Company Inkjet printhead with layered ceramic mounting substrate
US8813824B2 (en) 2011-12-06 2014-08-26 Mikro Systems, Inc. Systems, devices, and/or methods for producing holes
JP6056161B2 (ja) * 2012-03-12 2017-01-11 ブラザー工業株式会社 液滴噴射装置
EP3237213B1 (fr) * 2014-12-22 2020-03-04 Seiko Epson Corporation Tête d'éjection de liquide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117028A1 (de) 1981-04-29 1982-11-18 Siemens AG, 1000 Berlin und 8000 München Schreibkopf fuer tintenschreibeinrichtungen mit zylinderfoermigen tintenkanaelen
DE4225799A1 (de) 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
SE390673B (sv) * 1975-07-23 1977-01-03 Facit Ab Skrivhuvud for en bleckstraleskrivare
JPS57113075A (en) * 1980-12-30 1982-07-14 Fujitsu Ltd Ink jet head
DE3208104A1 (de) * 1982-03-06 1983-09-08 Philips Patentverwaltung Gmbh, 2000 Hamburg Druckkopf fuer einen matrixdrucker
US4665409A (en) 1984-11-29 1987-05-12 Siemens Aktiengesellschaft Write head for ink printer devices
DE8435035U1 (de) * 1984-11-29 1986-05-15 Siemens AG, 1000 Berlin und 8000 München Schreibkopf für Tintenschreibeinrichtungen
US4605939A (en) * 1985-08-30 1986-08-12 Pitney Bowes Inc. Ink jet array
US4752789A (en) * 1986-07-25 1988-06-21 Dataproducts Corporation Multi-layer transducer array for an ink jet apparatus
US4829324A (en) * 1987-12-23 1989-05-09 Xerox Corporation Large array thermal ink jet printhead
NL8903025A (nl) * 1989-12-08 1991-07-01 Oce Nederland Bv Stapelbare druppelgenerator voor een ink-jet printer.
US5057854A (en) * 1990-06-26 1991-10-15 Xerox Corporation Modular partial bars and full width array printheads fabricated from modular partial bars
DE69127258D1 (de) * 1990-11-13 1997-09-18 Citizen Watch Co Ltd Tintenstrahldruckkopf
JPH0640028A (ja) * 1992-07-27 1994-02-15 Ricoh Co Ltd プリンタ
US5608433A (en) * 1994-08-25 1997-03-04 Xerox Corporation Fluid application device and method of operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117028A1 (de) 1981-04-29 1982-11-18 Siemens AG, 1000 Berlin und 8000 München Schreibkopf fuer tintenschreibeinrichtungen mit zylinderfoermigen tintenkanaelen
DE4225799A1 (de) 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011461A1 (fr) * 1997-08-29 1999-03-11 Topaz Technologies, Inc. Ensemble tete integree pour imprimante a jet d'encre

Also Published As

Publication number Publication date
DE4424771C1 (de) 1995-11-23
US6367911B1 (en) 2002-04-09
DE59503508D1 (de) 1998-10-15
EP0691205A3 (fr) 1996-03-20
EP0691205B1 (fr) 1998-09-09

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