EP0022254A1 - Elément d'entraînement piézoélectrique pour tête d'écriture de dispositif d'écriture à mosaique à encre - Google Patents

Elément d'entraînement piézoélectrique pour tête d'écriture de dispositif d'écriture à mosaique à encre Download PDF

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Publication number
EP0022254A1
EP0022254A1 EP80103791A EP80103791A EP0022254A1 EP 0022254 A1 EP0022254 A1 EP 0022254A1 EP 80103791 A EP80103791 A EP 80103791A EP 80103791 A EP80103791 A EP 80103791A EP 0022254 A1 EP0022254 A1 EP 0022254A1
Authority
EP
European Patent Office
Prior art keywords
drive element
winding
element according
compression chamber
writing
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Withdrawn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
EP80103791A
Other languages
German (de)
English (en)
Inventor
Max Dr.Rer.Nat. Guntersdorfer
Peter Dipl.-Phys. Kleinschmidt
Klaus Dr.Rer.Nat. Dietrich
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
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0022254A1 publication Critical patent/EP0022254A1/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Withdrawn legal-status Critical Current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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S310/00—Electrical generator or motor structure
    • Y10S310/80—Piezoelectric polymers, e.g. PVDF

Definitions

  • the invention relates to a piezoelectric drive element for writing nozzles, in particular in ink mosaic writing devices, in which a writing fluid contained in a compression chamber enclosed by the drive element in a cylindrical manner is ejected in droplets by controllable contraction of the compression chamber.
  • a piezoelectric drive element for writing nozzles is known for example from DE-PS 25 37 767.
  • the application of this effect in an ink mosaic writing device is described for example in DE-OS 25 48 691.
  • tubular, the ink channels cylindrical encircling drive elements are made of polarized ceramic used, the diameter of which narrow when an electrical voltage polarized in the direction of the polarization voltage is applied, and widen when an electrical voltage polarized against the polarization voltage is applied.
  • the drive element is first expanded via a suitable circuit arrangement and then controlled by reversing the polarity of the voltage into a narrowed state, as a result of which an ink droplet is ejected.
  • a pulse-like voltage of more than 80V is required to operate such an arrangement.
  • the circuits to be provided for generating the voltage pulse increase the outlay for an ink spray head insofar as such voltage generation must be present for each of the piezoelectrically operated writing nozzles.
  • the invention has for its object to provide a piezoelectric drive element for writing nozzles in ink mosaic writing devices, which can be operated with a significantly lower voltage while maintaining the known advantages of such arrangements.
  • the writing head 1 of an ink mosaic writing device partially shown in FIG. 1 contains the ink channel 2, which narrows towards the outlet opening 3 and forms a writing nozzle.
  • the write head 1 is closed by a nozzle plate 4 which has the outlet openings 3.
  • the ink channel 2 is partially enclosed in a cylindrical shape by the drive element 5, 6.
  • the drive element consists of a winding 6, which is formed by many layers of a thin film with piezoelectric properties which is contacted on both sides over a large area, and which has one on the end faces and on the outer surfaces elastic material 5, which may for example be silicone rubber, is encased.
  • the voltage pulses necessary for the operation of the piezoelectric drive element are applied via connections 7, 8, by means of which a change in the inner radius of the winding is effected depending on the polarity of the designed voltage and the direction of the polarization voltage of the piezoelectric material.
  • FIG. 2 and 3 each show an exemplary embodiment of the winding 6.
  • the winding shown in FIG. 2 consists of several layers of a thin film 9, for example polyvinylidene difluoride PVDF, which is contacted on both sides over a large area. It is formed by winding two foils placed against one another, both foils being piezoelectrically active. As shown in FIG. 3, one of the foils can be replaced by an insulating layer 10. In any case, it is essential that between There is very good contact between the individual layers of the winding. This can be achieved, for example, by mechanical pre-tensioning when the films are wound up or by thinly coating the films with viscous adhesives or liquids before the winding process.
  • the winding is either poured directly into the comparatively rigid plastic body of the ink spray head, or, as in the exemplary embodiment in FIG. 1, it is encased on the end faces and on the outer surfaces by an elastic material, for example silicone rubber.
  • Electrodes are used to connect the winding to the operating voltage, for which materials with low modulus of elasticity, high ductility and high electrical conductivity are advantageously used.
  • a drive element designed according to the invention which surrounds an ink channel with a diameter of approximately 0.8 mm in a cylindrical shape over a width of approximately 10 mm, droplets at a pulse voltage of 35 V from an outlet opening with a diameter of 40 / u can be driven at a speed of 4 m / sec be expelled.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP80103791A 1979-07-05 1980-07-03 Elément d'entraînement piézoélectrique pour tête d'écriture de dispositif d'écriture à mosaique à encre Withdrawn EP0022254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2927269A DE2927269C2 (de) 1979-07-05 1979-07-05 Piezoelektrisches Antriebselement für Schreibdüsen in Tintenmosaikschreibeinrichtungen
DE2927269 1979-07-05

Publications (1)

Publication Number Publication Date
EP0022254A1 true EP0022254A1 (fr) 1981-01-14

Family

ID=6075028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103791A Withdrawn EP0022254A1 (fr) 1979-07-05 1980-07-03 Elément d'entraînement piézoélectrique pour tête d'écriture de dispositif d'écriture à mosaique à encre

Country Status (4)

Country Link
US (1) US4379246A (fr)
EP (1) EP0022254A1 (fr)
JP (1) JPS5611268A (fr)
DE (1) DE2927269C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275447A (en) * 1993-02-24 1994-08-31 Videojet Ltd Ink-resistant seals between components of an ink-jet print head.

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217248C2 (de) * 1982-05-07 1986-01-02 Siemens AG, 1000 Berlin und 8000 München Anordnung zum Ausstoß von Tintentröpfchen
US4588998A (en) * 1983-07-27 1986-05-13 Ricoh Company, Ltd. Ink jet head having curved ink
DE3504011A1 (de) * 1985-02-06 1986-08-07 Siemens AG, 1000 Berlin und 8000 München Kontaktierung schwingender bauelemente mittels leitgummi
US4742365A (en) * 1986-04-23 1988-05-03 Am International, Inc. Ink jet apparatus
US5652609A (en) * 1993-06-09 1997-07-29 J. David Scholler Recording device using an electret transducer
US6856073B2 (en) * 2002-03-15 2005-02-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Electro-active device using radial electric field piezo-diaphragm for control of fluid movement
US7045934B2 (en) * 2002-04-11 2006-05-16 Ernest Geskin Method for jet formation and the apparatus for the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325510A1 (fr) * 1975-09-29 1977-04-22 Siemens Ag Element d'entrainement piezoelectrique pour tete d'ecriture de dispositif d'ecriture a mosaique a encre
FR2365886A1 (fr) * 1976-09-24 1978-04-21 Pennwalt Corp Procede de polarisation d'un empilement de membranes pour dispositif piezoelectrique
US4166229A (en) * 1978-02-23 1979-08-28 The United States Of America As Represented By The Secretary Of The Navy Piezoelectric polymer membrane stress gage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1350836A (en) * 1970-06-29 1974-04-24 Kyser E L Method and apparatus for recording with writing fluids and drop projection means therefor
US3946398A (en) * 1970-06-29 1976-03-23 Silonics, Inc. Method and apparatus for recording with writing fluids and drop projection means therefor
US3683212A (en) * 1970-09-09 1972-08-08 Clevite Corp Pulsed droplet ejecting system
FR2145099A5 (fr) * 1971-07-08 1973-02-16 Inst Francais Du Petrole
DE2537767B1 (de) * 1975-08-25 1977-01-20 Siemens Ag Piezoelektrisches Antriebselement fuer Schreibduesen
DE2548691C3 (de) * 1975-10-30 1986-04-17 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum Ansteuern von Schreibdüsen in Tintenmosaikschreibeinrichtungen
AT375466B (de) * 1977-07-27 1984-08-10 List Hans Messwertaufnehmer mit einem piezoelektrischen messelement
US4216483A (en) * 1977-11-16 1980-08-05 Silonics, Inc. Linear array ink jet assembly
US4282532A (en) * 1979-06-04 1981-08-04 Xerox Corporation Ink jet method and apparatus using a thin film piezoelectric excitor for drop generation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325510A1 (fr) * 1975-09-29 1977-04-22 Siemens Ag Element d'entrainement piezoelectrique pour tete d'ecriture de dispositif d'ecriture a mosaique a encre
FR2365886A1 (fr) * 1976-09-24 1978-04-21 Pennwalt Corp Procede de polarisation d'un empilement de membranes pour dispositif piezoelectrique
US4166229A (en) * 1978-02-23 1979-08-28 The United States Of America As Represented By The Secretary Of The Navy Piezoelectric polymer membrane stress gage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELECTRONIC ENGINEERING, April 1975, Band 47, Nr. 566, "Laminated piezoelectric ceramic transducers", Seite 29 * Das ganze Dokument * *
JAPANESE JOURNAL OF APPLIED PHYSICS, Band 16, Nr. 12, Dezember 1977, N. CHUBACHI et al.: "Confocal pair of concave transducers made of PVF2 piezoelectric films", Seite 2259 * Das ganze Dokument * *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275447A (en) * 1993-02-24 1994-08-31 Videojet Ltd Ink-resistant seals between components of an ink-jet print head.
US5589863A (en) * 1993-02-24 1996-12-31 Videojet Systems International, Inc. Ink jet droplet generator

Also Published As

Publication number Publication date
US4379246A (en) 1983-04-05
JPS5611268A (en) 1981-02-04
DE2927269A1 (de) 1981-01-15
DE2927269C2 (de) 1982-10-28

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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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17P Request for examination filed

Effective date: 19810130

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Withdrawal date: 19840201

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KLEINSCHMIDT, PETER, DIPL.-PHYS.

Inventor name: GUNTERSDORFER, MAX, DR.RER.NAT.

Inventor name: DIETRICH, KLAUS, DR.RER.NAT.