EP0778135A2 - Elektrostatisches Tintenstrahlaufzeichnungsgerät - Google Patents

Elektrostatisches Tintenstrahlaufzeichnungsgerät Download PDF

Info

Publication number
EP0778135A2
EP0778135A2 EP96119562A EP96119562A EP0778135A2 EP 0778135 A2 EP0778135 A2 EP 0778135A2 EP 96119562 A EP96119562 A EP 96119562A EP 96119562 A EP96119562 A EP 96119562A EP 0778135 A2 EP0778135 A2 EP 0778135A2
Authority
EP
European Patent Office
Prior art keywords
electrode
ink
counter electrode
toner particles
record
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
EP96119562A
Other languages
English (en)
French (fr)
Other versions
EP0778135B1 (de
EP0778135A3 (de
Inventor
Kazuo Shima
Junichi Suetsugu
Ryosuke Uematsu
Hitoshi Minemoto
Yoshihiro Hagiwara
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Publication of EP0778135A2 publication Critical patent/EP0778135A2/de
Publication of EP0778135A3 publication Critical patent/EP0778135A3/de
Application granted granted Critical
Publication of EP0778135B1 publication Critical patent/EP0778135B1/de
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
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
    • 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
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
    • B41J2002/061—Ejection by electric field of ink or of toner particles contained in ink

Definitions

  • An electrostatic ink jet recording device of the present invention includes an ink chamber storing liquid ink containing charged toner particles.
  • An ejection opening or slit is formed in one end portion of the ink chamber.
  • An electrophoresis electrode is positioned at the other end portion of the ink chamber facing the one end portion.
  • a plurality of record electrodes are arranged in parallel in the ejection opening.
  • a counter electrode faces the record electrodes with the intermediary of a path for transporting a recording medium.
  • Discharging means is located upstream of the counter electrode with respect to the intended direction of medium transport. The discharging means dissipates any undesirable charge deposited on the recording medium before the medium reaches the counter electrode.
  • the toner particles are mainly consumed at the time of recording. Therefore, just after the ejection of the toner particles toward the recording medium, the toner content of the ink is lowered around the record electrode 102.
  • the high voltage constantly applied to the electrophoresis electrode 105 causes the toner particles to migrate from the electrode 105 toward the electrode 102 due to electrophoresis. This allows only the toner particles to be replenished to around the electrode 102.
  • the electrode 102 is insulated from the ink. Therefore, when the potential distribution in the ink chamber 113 reaches equilibrium due to the migration of the charged toner particles, no more particles are replenished to the above position.
  • the conventional recording device with the above head assembly has the previously stated problem left unsolved.
  • serial print head While the illustrative embodiment has concentrated on a serial print head, it may, of course, be implemented as a line print head, if desired.
  • discharging means is positioned upstream of a counter electrode with respect to an intended direction of paper transport. Therefore, even when a paper is undesirably charged during transport, the paper is successfully discharged before it reaches the counter electrode 2. This insures a stable electric field between record electrodes and the counter electrode, i.e., the stable ejection of a drop at the time of recording.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP19960119562 1995-12-08 1996-12-05 Elektrostatisches Tintenstrahlaufzeichnungsgerät Expired - Lifetime EP0778135B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP320112/95 1995-12-08
JP32011295 1995-12-08
JP32011295A JP2783227B2 (ja) 1995-12-08 1995-12-08 静電式インクジェット記録装置

Publications (3)

Publication Number Publication Date
EP0778135A2 true EP0778135A2 (de) 1997-06-11
EP0778135A3 EP0778135A3 (de) 1997-10-22
EP0778135B1 EP0778135B1 (de) 1999-09-15

Family

ID=18117839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960119562 Expired - Lifetime EP0778135B1 (de) 1995-12-08 1996-12-05 Elektrostatisches Tintenstrahlaufzeichnungsgerät

Country Status (3)

Country Link
EP (1) EP0778135B1 (de)
JP (1) JP2783227B2 (de)
DE (1) DE69604267T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779155A3 (de) * 1995-12-14 1997-11-12 Nec Corporation Tintenstrahlkopf
EP1522410A1 (de) * 2003-09-24 2005-04-13 Fuji Photo Film Co., Ltd. Tintenstrahldrucker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1178024A (ja) * 1997-09-01 1999-03-23 Matsushita Electric Ind Co Ltd インクジェット記録装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2028596B (en) * 1978-05-26 1983-02-16 Lucas Industries Ltd Apparatus for removing electro-static charge from an aircraft windscreen
JPS6157343A (ja) * 1984-08-29 1986-03-24 Toshiba Corp インクジエツト記録装置
US4918464A (en) * 1988-11-25 1990-04-17 Dai Nippon Insatu Kabushiki Kaisha Heat-sensitive image transfer type printing apparatus
JPH03147648A (ja) * 1989-11-02 1991-06-24 Ricoh Co Ltd 画像形成装置の給紙装置
EP0450402A3 (en) * 1990-03-20 1992-01-22 Mita Industrial Co., Ltd. Printer with a static electricity eliminator and a taking-up means for an ink ribbon slack
JPH0545952A (ja) * 1991-08-16 1993-02-26 Minolta Camera Co Ltd 作像カートリツジ
AU664404B2 (en) * 1991-12-18 1995-11-16 Tonejet Limited Method and apparatus for the production of discrete agglomerations of particulate matter
JPH06202497A (ja) * 1992-12-29 1994-07-22 Canon Inc 画像形成装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779155A3 (de) * 1995-12-14 1997-11-12 Nec Corporation Tintenstrahlkopf
US5801730A (en) * 1995-12-14 1998-09-01 Nec Corporation Ink jet print head having a projecting ejection electrode
EP1522410A1 (de) * 2003-09-24 2005-04-13 Fuji Photo Film Co., Ltd. Tintenstrahldrucker
US7300139B2 (en) 2003-09-24 2007-11-27 Fujifilm Corporation Ink jet recording apparatus using charged fine particle-containing ink

Also Published As

Publication number Publication date
JP2783227B2 (ja) 1998-08-06
DE69604267T2 (de) 2000-05-11
JPH09156110A (ja) 1997-06-17
EP0778135B1 (de) 1999-09-15
EP0778135A3 (de) 1997-10-22
DE69604267D1 (de) 1999-10-21

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