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JPS5663460A - Ink jet head - Google Patents

Ink jet head

Info

Publication number
JPS5663460A
JPS5663460A JP13975579A JP13975579A JPS5663460A JP S5663460 A JPS5663460 A JP S5663460A JP 13975579 A JP13975579 A JP 13975579A JP 13975579 A JP13975579 A JP 13975579A JP S5663460 A JPS5663460 A JP S5663460A
Authority
JP
Japan
Prior art keywords
ink
magnetic
magnetic field
driving circuit
generating apparatus
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.)
Pending
Application number
JP13975579A
Other languages
Japanese (ja)
Inventor
Takuo Isayama
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13975579A priority Critical patent/JPS5663460A/en
Publication of JPS5663460A publication Critical patent/JPS5663460A/en
Pending legal-status Critical Current

Links

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
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/055—Devices for absorbing or preventing back-pressure

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Special Spraying Apparatus (AREA)

Abstract

PURPOSE:To obtain the ink jet head wherein a magnetic ink is used and the jet efficiency is increased, by arranging a magnetic field generating apparatus upstream with respect to a vibrator unit, the magnetic field generating apparatus preventing the magnetic ink from flowing back when the vibrator unit applies pressure to the magnetic ink in a liquid chamber. CONSTITUTION:When a signal P of information such as letters is inputted, driving pulses (a) are outputted from a driving circuit 9, and the driving pulses (a) are applied through a leading wire 5 to the vibrator unit 4 to vibrate it and to generate pressure waves in the ink within the liquid chamber 3, so that ink droplets are jetted from a nozzle 2 and part of the ink is pushed back toward an ink introducing tube 6. At the same time, the driving circuit 9 sends a signal to a time delay circuit 10 of which the signal (b) drives 9 magnetic field driving circuit 11. The magnetic field driving circuit 11 sends a pulse electric current (c) to a coil 13 to drive the magnetic field generating apparatus 8. The magnetic ink within the ink introducing tube 6 is forced to the opposite wall of the tube 6 by magnetic force so that the tendency of the magnetic ink to flow back may be prevented and therefore the amount of the ink to be jetted from the nozzle 2 can be increased.
JP13975579A 1979-10-31 1979-10-31 Ink jet head Pending JPS5663460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13975579A JPS5663460A (en) 1979-10-31 1979-10-31 Ink jet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13975579A JPS5663460A (en) 1979-10-31 1979-10-31 Ink jet head

Publications (1)

Publication Number Publication Date
JPS5663460A true JPS5663460A (en) 1981-05-30

Family

ID=15252624

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13975579A Pending JPS5663460A (en) 1979-10-31 1979-10-31 Ink jet head

Country Status (1)

Country Link
JP (1) JPS5663460A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760286A1 (en) * 1995-08-25 1997-03-05 Hewlett-Packard Company Method and apparatus for controlling inkjet nozzle loading

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760286A1 (en) * 1995-08-25 1997-03-05 Hewlett-Packard Company Method and apparatus for controlling inkjet nozzle loading

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