EP0709194A1 - Tête d'imprimante à jet d'encre - Google Patents

Tête d'imprimante à jet d'encre Download PDF

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Publication number
EP0709194A1
EP0709194A1 EP95307233A EP95307233A EP0709194A1 EP 0709194 A1 EP0709194 A1 EP 0709194A1 EP 95307233 A EP95307233 A EP 95307233A EP 95307233 A EP95307233 A EP 95307233A EP 0709194 A1 EP0709194 A1 EP 0709194A1
Authority
EP
European Patent Office
Prior art keywords
membrane
actuator
chamber
sockets
socket
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
EP95307233A
Other languages
German (de)
English (en)
Other versions
EP0709194B1 (fr
Inventor
Jerzy Marcin Zaba
Matthew Brian Tomlin
Colin Edward Chamberlain
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.)
Domino Printing Sciences PLC
Original Assignee
Domino Printing Sciences PLC
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 Domino Printing Sciences PLC filed Critical Domino Printing Sciences PLC
Publication of EP0709194A1 publication Critical patent/EP0709194A1/fr
Application granted granted Critical
Publication of EP0709194B1 publication Critical patent/EP0709194B1/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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/025—Ink jet characterised by the jet generation process generating a continuous ink jet by vibration

Definitions

  • the present invention relates to ink jet printheads and, more particularly, to ink jet printheads for use in continuous ink jet printers having multiple streams of droplets issuing through corresponding orifices.
  • EP-A-0084891 discloses a multi-jet single head printer with multiple actuators mounted on a base and operated in phase.
  • an ink jet printhead comprises a housing having a chamber to which ink is supplied and having a row of orifices through which droplets are ejected in use under the action of an actuator bounding a portion of the chamber, the actuator comprising a body having a plurality of sockets, a membrane or membranes disposed so as to close one side of each of the sockets, and a piezoelectric or electrostrictive transducer disposed within each socket and mounted on the membrane closing the one side of the socket.
  • a single membrane closes all the sockets and is bonded to a face of the actuator body.
  • the membrane is stainless steel in a preferred embodiment.
  • Each transducer is preferably adhesively bonded to the membrane at the centre of the side of the respective socket.
  • the necessary electrical connections can be provided by wire bonding conductors to the transducers.
  • Figure 1 shows the actuator in an exploded isometric view, the actuator comprising a stainless steel body 1 which provides a chamber 2 for containing ink to be printed through multiple droplet streams 3 emitted through plural orifices in a stainless steel nozzle plate 4 which is attached to one face of the body 1.
  • a rectangular stainless steel foil or membrane 5 which is clamped to the face of the body 1 by a rigid clamping plate 6.
  • the clamping is shown as being provided by bolts 7.
  • the foil or membrane 5 Prior to being clamped onto the body 1 the foil or membrane 5 is bonded to the (as shown) underside of the clamping plate 6.
  • the clamping plate 6 has, as shown, four circular bores 8 which extend through it and the foil or membrane 5 has on it a correspondingly arranged row of disk-like unimorph piezoelectric crystals 9. The diameter of the unimorph crystals 9 is less than the bores 8 so that there are provided, in effect, a plurality of clamped foil disks along the length of the chamber 2.
  • the crystals 9 can be energised simultaneously to flex their respective disks at the same time thus creating a uniform disturbance in the ink within the chamber.
  • Such a multiple-unimorph structure has the advantage that a circular foil disk has a much higher fundamental mode of vibration than the rectangular foil of the prior design.
  • a 30mm by 6mm rectangle of 180 micron thick steel has a fundamental vibration frequency of 27.4kHz whereas a 6mm diameter disk of the same material has a fundamental vibration frequency of 49.3kHz.
  • the nearest higher mode of vibration is 1.6 times the fundamental frequency because the disk will be likely to vibrate purely in the fundamental mode when excited at 50kHz.
  • a further advantage of the construction is that it may be made modular so that a long array of nozzles may be accommodated simply by increasing the length of the chamber and the foil/membrane and the number of piezoelectric crystals or transducers. Crosstalk is also minimised by the bonding of the foil to the clamping plate 6.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP95307233A 1994-10-24 1995-10-12 Tête d'imprimante à jet d'encre Expired - Lifetime EP0709194B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9421389A GB9421389D0 (en) 1994-10-24 1994-10-24 Ink jet printhead
GB9421389 1994-10-24

Publications (2)

Publication Number Publication Date
EP0709194A1 true EP0709194A1 (fr) 1996-05-01
EP0709194B1 EP0709194B1 (fr) 1999-02-10

Family

ID=10763283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95307233A Expired - Lifetime EP0709194B1 (fr) 1994-10-24 1995-10-12 Tête d'imprimante à jet d'encre

Country Status (4)

Country Link
EP (1) EP0709194B1 (fr)
JP (1) JPH08207276A (fr)
DE (1) DE69507762T2 (fr)
GB (1) GB9421389D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6254224B1 (en) * 1996-12-23 2001-07-03 Domino Printing Sciences Plc Ink jet printer
WO2002034526A1 (fr) * 2000-10-24 2002-05-02 Videojet Technologies Inc. Generateur de gouttelettes pour tete d'impression a jet d'encre continu

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065774A (en) * 1975-05-30 1977-12-27 International Business Machines Corporation Hybrid fluid jet drop generation
US4095232A (en) * 1977-07-18 1978-06-13 The Mead Corporation Apparatus for producing multiple uniform fluid filaments and drops
US4138687A (en) * 1977-07-18 1979-02-06 The Mead Corporation Apparatus for producing multiple uniform fluid filaments and drops
US4387383A (en) * 1981-11-12 1983-06-07 Ncr Corporation Multiple nozzle ink jet print head
EP0084891A2 (fr) 1982-01-27 1983-08-03 TMC Company Imprimante à jet d'encre avec une seule tête à jets multiples
US4641153A (en) * 1985-09-03 1987-02-03 Pitney Bowes Inc. Notched piezo-electric transducer for an ink jet device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4746929A (en) * 1987-01-16 1988-05-24 Xerox Corporation Traveling wave droplet generator for an ink jet printer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065774A (en) * 1975-05-30 1977-12-27 International Business Machines Corporation Hybrid fluid jet drop generation
US4095232A (en) * 1977-07-18 1978-06-13 The Mead Corporation Apparatus for producing multiple uniform fluid filaments and drops
US4138687A (en) * 1977-07-18 1979-02-06 The Mead Corporation Apparatus for producing multiple uniform fluid filaments and drops
US4387383A (en) * 1981-11-12 1983-06-07 Ncr Corporation Multiple nozzle ink jet print head
EP0084891A2 (fr) 1982-01-27 1983-08-03 TMC Company Imprimante à jet d'encre avec une seule tête à jets multiples
US4641153A (en) * 1985-09-03 1987-02-03 Pitney Bowes Inc. Notched piezo-electric transducer for an ink jet device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6254224B1 (en) * 1996-12-23 2001-07-03 Domino Printing Sciences Plc Ink jet printer
WO2002034526A1 (fr) * 2000-10-24 2002-05-02 Videojet Technologies Inc. Generateur de gouttelettes pour tete d'impression a jet d'encre continu
US6883899B2 (en) 2000-10-24 2005-04-26 Videojet Technologies, Inc. Droplet generator for a continuous stream ink jet print head

Also Published As

Publication number Publication date
JPH08207276A (ja) 1996-08-13
EP0709194B1 (fr) 1999-02-10
DE69507762T2 (de) 1999-07-01
DE69507762D1 (de) 1999-03-25
GB9421389D0 (en) 1994-12-07

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