EP0103841A2 - Tête à écrire avec éléments d'entraînement piézoélectriques pour dispositifs d'écriture à encre - Google Patents

Tête à écrire avec éléments d'entraînement piézoélectriques pour dispositifs d'écriture à encre Download PDF

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Publication number
EP0103841A2
EP0103841A2 EP83109041A EP83109041A EP0103841A2 EP 0103841 A2 EP0103841 A2 EP 0103841A2 EP 83109041 A EP83109041 A EP 83109041A EP 83109041 A EP83109041 A EP 83109041A EP 0103841 A2 EP0103841 A2 EP 0103841A2
Authority
EP
European Patent Office
Prior art keywords
piezo
tube group
ink
piezo tube
transducers
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Withdrawn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
EP83109041A
Other languages
German (de)
English (en)
Other versions
EP0103841A3 (fr
Inventor
Erich Dipl.-Ing. Kattner
Kurt Herzog
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0103841A2 publication Critical patent/EP0103841A2/fr
Publication of EP0103841A3 publication Critical patent/EP0103841A3/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Withdrawn legal-status Critical Current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
    • B41J2/1429—Structure of print heads with piezoelectric elements of tubular type
    • 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
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49169—Assembling electrical component directly to terminal or elongated conductor
    • Y10T29/49171—Assembling electrical component directly to terminal or elongated conductor with encapsulating
    • Y10T29/49172—Assembling electrical component directly to terminal or elongated conductor with encapsulating by molding of insulating material

Definitions

  • the invention relates to a writing head for ink writing devices according to the preamble of patent claim 1.
  • a writing head for ink writing devices which contains a plurality of writing nozzles in the form of ink channels which receive writing fluid and which are formed by shaping the writing head.
  • the individual ink channels run in the direction of a nozzle plate that closes the ink channels toward one another in the form of a beam.
  • Piezoelectric drive elements are arranged offset to the rear as seen from the outlet openings and comprise the ink channels in a cylindrical shape. A drop-by-drop ejection of writing fluid takes place through piezoelectric deformation of the piezoelectric drive element acting on the ink channel in question.
  • Such a structure makes it possible to manufacture the write head by casting the drive elements while simultaneously forming the ink channels.
  • the object of the invention is to provide a write head which, owing to its construction, enables a considerably simpler manufacture, while at the same time ensuring a good, i.e. Trouble-free use is required. Quality with regard to the formation of the ink channels is guaranteed and the contacting of the piezo elements is further improved.
  • the advantages which can be achieved with the measures according to the invention consist primarily in the fact that the functional parts of the write head which are decisive for practical writing operation are each manufactured as individual parts and can be checked for their mechanical as well as their electrical properties before final assembly, for example. Furthermore, when using the invention, there are improvements in terms of contacting, in that the problems associated therewith, particularly with regard to contacting the inner electrode of the piezo transducers, are considerably simplified and contacting is at the same time more reliable can be made. For example, a previously required wire coil between the ink channel and the piezo converter is no longer necessary.
  • the individual parts can advantageously be produced in the so-called injection molding process using thermoplastic material, which leads to short mold usage times at a low mold temperature.
  • Figure 1 shows a printhead for ink pens with the details necessary for understanding the invention. To clarify the structure, a representation has been chosen in which the upper housing cover has been removed.
  • the write head has seven ink channels 1, which end at a nozzle plate 2 in the shape of a beam.
  • the recording medium 3 is located in front of this.
  • Each ink channel 1 is surrounded by a tubular piezo transducer 4 at an area remote from the nozzle plate 2. From there, the ink channels 1 lead further to an ink supply system, not shown here.
  • the seven ink channels 1 are arranged in one plane, for example in such a way that the seven outlet openings of the individual ink channels lie one above the other on the nozzle plate 2.
  • the ink channels 1 are combined with the piezo transducers 4 assigned to each ink channel to form a piezo tube group.
  • the piezo tube group which can be produced as a single part, preferably by injection molding from thermoplastic material, has a web 5 and at its front end facing the nozzle plate 2 has a conical surface 6 for covering the ink channels 7.
  • the front end of the write head facing the recording medium 3 is formed by a front housing part 8, which serves both as a holder for the ink channel orifices 7 and also has the temperature sensing and heating element required for heating the nozzle plate 2.
  • the piezo tube group is covered by a housing cover, which cannot be seen from FIG. 1, in which the contact elements for the connections of the piezo transducers are also located. Details of this are given below with reference to FIG. 2.
  • FIG. 2 shows an enlarged section through the write head according to FIG. 1, the same parts being designated with the same reference numerals.
  • the walls of the ink channels 1 of a piezo tube group are formed by a thermoplastic potting material, for which the requirements for good compatibility with the ink used or the requirement for flame resistance can be easily met.
  • the piezo transducers 4 of a piezo tube group comprise each ink channel 1, a protective layer 10 being provided between the ink channel 1 and the piezo transducer 4, which ensures reliable protection both against chemical influences and against electrical interference, for example against short circuits.
  • Each piezo transducer 4 is covered with a contact layer on its outer and on its inner lateral surface.
  • contact connections 12 are provided, which can be designed as conventional connection pins on the outside and which end in contact springs 13 on the inside. When the housing cap 11 is put on, it is pressed onto the electrode surfaces of the piezo transducer 4 and represents a reliable contact between the latter and the external connection pins 12.
  • the ink channels 1 of a piezo tube group are combined in the conical surface 6. This is shaped according to the front housing part 8 and can be fitted into it.
  • the front housing part 8 also contains a heat-conducting sheet 14 on which a temperature sensing element 15, for example a PTC thermistor and a heating element 16, for example a heating resistor, is attached.
  • the attachment can e.g. done by soldering.
  • the heat-conducting sheet 14 and the heating element 16 are inserted into the plastic front housing part 8, which also receives the piezo tube group.
  • a contact spring with an externally guided connecting pin is also advantageously used for contacting.
  • the front housing part 8 also forms the contact surface for the nozzle plate 2.
  • the heat-conducting sheet with temperature-sensing and heating element into the front housing part 8, and then to contact the contact surface e.g. machined after assembly to obtain an extremely smooth contact surface for the nozzle plate. This also exposes the heat-conducting sheet, which then lies directly on the nozzle plate.
  • Each piezo tube group is manufactured as a whole either by injection molding or by injection molding.
  • a special tool suitable for production by the injection molding process consists of two parts, each of which forms a type of half-shell. An example of this is shown in FIG. 3.
  • a channel needle 19 inserted into the two molded parts 17 and 18 corresponds in diameter to the inner diameter of an ink channel.
  • the wall thickness of the ink channel is determined by the dimensions of the molded parts.
  • the piezo transducers 4 are also inserted at the same time as the channel needle 19.
  • the casting compound is then injected via the filling opening 20.
  • the filling opening 20 is preferably arranged approximately in the middle of each ink channel of a piezo tube group, so that flow paths of approximately the same length result on both sides for each ink channel.
  • the writing head is assembled in such a way that the piezo tube group with its channel openings 7 is inserted into the front housing part 8. It is managed and held there.
  • the cover is ensured by the conical surface 6.
  • the housing cover caps 11 are placed, the contact springs 13 being pressed against the contact surfaces of the piezo transducers 4 and establishing the electrical contact.
  • the entire assembly can then be coated with a resin, e.g. be cast in a fast-curing plastic. This ensures reliable protection against moisture, mechanical damage, etc.
  • the invention was explained using an example in which the ink channels and the piezo transducers are arranged in the form of a piezo tube group in only one plane. However, it is within the scope of the invention to provide a plurality of piezo tube groups in a write head, which then form a so-called multi-row write head.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
EP83109041A 1982-09-16 1983-09-13 Tête à écrire avec éléments d'entraínement piézoélectriques pour dispositifs d'écriture à encre Withdrawn EP0103841A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3234408 1982-09-16
DE3234408A DE3234408C2 (de) 1982-09-16 1982-09-16 Schreibkopf mit piezoelektrischen Antriebselementen für Tintenschreibeinrichtungen

Publications (2)

Publication Number Publication Date
EP0103841A2 true EP0103841A2 (fr) 1984-03-28
EP0103841A3 EP0103841A3 (fr) 1985-08-21

Family

ID=6173412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109041A Withdrawn EP0103841A3 (fr) 1982-09-16 1983-09-13 Tête à écrire avec éléments d'entraínement piézoélectriques pour dispositifs d'écriture à encre

Country Status (4)

Country Link
US (1) US4504845A (fr)
EP (1) EP0103841A3 (fr)
JP (1) JPS5973965A (fr)
DE (1) DE3234408C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161341A3 (en) * 1984-05-18 1986-10-22 Siemens Aktiengesellschaft Berlin Und Munchen Device for fastening and contacting for cylindrical piezo-electrical transducers
EP0305317A1 (fr) * 1987-08-28 1989-03-01 Siemens Aktiengesellschaft Procédé de fabrication des canaux d'encre dans une tête d'impression pour une imprimante matricielle à jet d'encre
US4868582A (en) * 1987-08-28 1989-09-19 Siemens Aktiengesellschaft Method for fashioning ink channels in a write head for a dot-matrix ink printer means
EP0326804A3 (fr) * 1988-02-05 1990-01-31 AEG Olympia Office GmbH Tête d'écriture à actionneurs piézo-électriques pour imprimantes matricielles à jet d'encre

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4493137A (en) * 1983-09-19 1985-01-15 Ncr Corporation Method of making a drive element assembly for ink jet printing
US4660056A (en) * 1984-03-23 1987-04-21 Canon Kabushiki Kaisha Liquid jet recording head
DE3418201A1 (de) * 1984-05-16 1985-11-21 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum positionieren von formnadeln in einer giess- oder spritzformschale
EP0164445B1 (fr) * 1984-05-16 1989-04-26 Siemens Aktiengesellschaft Ensemble pour la fixation et la connexion d'éléments moteurs piézoélectriques dans la tête d'enregistrement d'une imprimante à jet d'encre
IT1182285B (it) 1984-09-25 1987-10-05 Olivetti & Co Spa Testina di stampa a getto d inchiostro relativo procedimento di fabbricazione ed attrezzo utilizzabile per l attuazione di tale procedimento
US4665409A (en) * 1984-11-29 1987-05-12 Siemens Aktiengesellschaft Write head for ink printer devices
DE3504011A1 (de) * 1985-02-06 1986-08-07 Siemens AG, 1000 Berlin und 8000 München Kontaktierung schwingender bauelemente mittels leitgummi
US4739347A (en) * 1985-07-17 1988-04-19 Ricoh Company, Ltd. Ink supply system for use in an ink-jet printer
US4625373A (en) * 1985-08-02 1986-12-02 Advanced Color Technology, Inc. Method of making a printing head for an ink jet printer
IT1187936B (it) * 1986-02-26 1987-12-23 Olivetti & Co Spa Testina di stampa mutliugello a getto d inchiostro e relativo metodo di fabbricazione
US4664511A (en) * 1986-04-10 1987-05-12 Chesley F. Carlson Co. Vacuum frame registration board with static sink
USRE35737E (en) * 1986-07-09 1998-02-24 Vidoejet Systems International, Inc. Accoustically soft ink jet nozzle assembly
US4695854A (en) * 1986-07-30 1987-09-22 Pitney Bowes Inc. External manifold for ink jet array
US4877745A (en) * 1986-11-17 1989-10-31 Abbott Laboratories Apparatus and process for reagent fluid dispensing and printing
EP0378551B1 (fr) * 1987-08-26 1993-03-10 Siemens Aktiengesellschaft Element d'entrainement pour tetes d'ecriture de mecanismes d'impression a l'encre
DE3804165A1 (de) * 1988-02-11 1989-08-24 Olympia Aeg Verfahren zum bestuecken eines tintenstrahldruckkopfes mit piezokristallen
WO1990009284A1 (fr) * 1989-02-17 1990-08-23 Siemens Aktiengesellschaft Procede pour fabriquer une tete a jet d'encre
DE69219180T2 (de) * 1991-02-12 1997-10-02 Canon Kk Tintenstrahlaufzeichnungssystem und Verfahren
US5363124A (en) * 1993-01-26 1994-11-08 Videojet Systems International, Inc. Printhead for ink jet printers
US6203759B1 (en) 1996-05-31 2001-03-20 Packard Instrument Company Microvolume liquid handling system
US6521187B1 (en) 1996-05-31 2003-02-18 Packard Instrument Company Dispensing liquid drops onto porous brittle substrates
US6537817B1 (en) 1993-05-31 2003-03-25 Packard Instrument Company Piezoelectric-drop-on-demand technology
US6083762A (en) * 1996-05-31 2000-07-04 Packard Instruments Company Microvolume liquid handling system
US6698092B2 (en) * 2001-10-31 2004-03-02 Hewlett-Packard Development Company, L.P. Methods and systems for forming a die package
US7163284B2 (en) * 2001-12-12 2007-01-16 Industrial Technology Research Institute Multi-reagent inkjet cartridge
US7052117B2 (en) * 2002-07-03 2006-05-30 Dimatix, Inc. Printhead having a thin pre-fired piezoelectric layer
US20040113991A1 (en) * 2002-12-16 2004-06-17 Xerox Corporation Ink jet apparatus
US6880911B2 (en) * 2003-07-15 2005-04-19 Toshiba Tec Kabushiki Kaisha Ink jet head unit
US8491076B2 (en) 2004-03-15 2013-07-23 Fujifilm Dimatix, Inc. Fluid droplet ejection devices and methods
US7281778B2 (en) * 2004-03-15 2007-10-16 Fujifilm Dimatix, Inc. High frequency droplet ejection device and method
US7438395B2 (en) * 2004-09-24 2008-10-21 Brother Kogyo Kabushiki Kaisha Liquid-jetting apparatus and method for producing the same
EP1836056B1 (fr) 2004-12-30 2018-11-07 Fujifilm Dimatix, Inc. Impression a jet d'encre
US20080158327A1 (en) * 2007-01-03 2008-07-03 Robert P. Siegel Portable system for large area printing
US7988247B2 (en) * 2007-01-11 2011-08-02 Fujifilm Dimatix, Inc. Ejection of drops having variable drop size from an ink jet printer

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE7227178U (de) * 1975-11-27 Rena Bueromaschinenfabrik Gmbh & Co Nadelführung für Drucknadeln innerhalb eines Mosaikdruckkopfes
CA1012198A (en) * 1974-07-19 1977-06-14 Stephan B. Sears Method and apparatus for recording with writing fluids and drop projection means therefor
US4128345A (en) * 1975-03-28 1978-12-05 Universal Technology, Inc. Fluid impulse matrix printer
US4158847A (en) * 1975-09-09 1979-06-19 Siemens Aktiengesellschaft Piezoelectric operated printer head for ink-operated mosaic printer units
DE2543451C2 (de) * 1975-09-29 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Piezoelektrisch betriebener Schreibkopf für Tintenmosaikschreibeinrichtungen
DE7728016U1 (de) * 1977-09-09 1981-12-17 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum kontaktieren von im schreibkopf von tintenschreibeinrichtungen zu vergiessenden piezowandlern
US4248823A (en) * 1978-12-15 1981-02-03 Ncr Corporation Method of making ink jet print head
JPS55150376A (en) * 1979-05-14 1980-11-22 Canon Inc Liquid ejection recording head
DE2930004A1 (de) * 1979-07-24 1981-03-12 Siemens AG, 1000 Berlin und 8000 München Piezoelektrisches antriebselement fuer schreibkoepfe in tintenmosaikschreibeinrichtungen.
DE3019822A1 (de) * 1980-05-23 1981-12-03 Siemens AG, 1000 Berlin und 8000 München Anordnung fuer einen schreibkopf in tintenmosaikschreibeinrichtungen
DE3104077A1 (de) * 1981-02-06 1982-09-09 Philips Patentverwaltung Gmbh, 2000 Hamburg "schreibkopf fuer tintenstrahldrucker"

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161341A3 (en) * 1984-05-18 1986-10-22 Siemens Aktiengesellschaft Berlin Und Munchen Device for fastening and contacting for cylindrical piezo-electrical transducers
EP0305317A1 (fr) * 1987-08-28 1989-03-01 Siemens Aktiengesellschaft Procédé de fabrication des canaux d'encre dans une tête d'impression pour une imprimante matricielle à jet d'encre
US4868582A (en) * 1987-08-28 1989-09-19 Siemens Aktiengesellschaft Method for fashioning ink channels in a write head for a dot-matrix ink printer means
US4868583A (en) * 1987-08-28 1989-09-19 Siemens Aktiengesellschaft Method for fashioning ink channels in a write head for a dot-matrix ink printer means
EP0326804A3 (fr) * 1988-02-05 1990-01-31 AEG Olympia Office GmbH Tête d'écriture à actionneurs piézo-électriques pour imprimantes matricielles à jet d'encre

Also Published As

Publication number Publication date
US4504845A (en) 1985-03-12
JPS5973965A (ja) 1984-04-26
DE3234408C2 (de) 1986-01-09
EP0103841A3 (fr) 1985-08-21
DE3234408A1 (de) 1984-03-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: KATTNER, ERICH, DIPL.-ING.

Inventor name: HERZOG, KURT