JPS649745A - Method for driving on-demand type ink jet head - Google Patents

Method for driving on-demand type ink jet head

Info

Publication number
JPS649745A
JPS649745A JP16651087A JP16651087A JPS649745A JP S649745 A JPS649745 A JP S649745A JP 16651087 A JP16651087 A JP 16651087A JP 16651087 A JP16651087 A JP 16651087A JP S649745 A JPS649745 A JP S649745A
Authority
JP
Japan
Prior art keywords
liquid chamber
drive pulse
ink
vibrating unit
time
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
JP16651087A
Other languages
Japanese (ja)
Inventor
Shuzo Matsumoto
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 JP16651087A priority Critical patent/JPS649745A/en
Publication of JPS649745A publication Critical patent/JPS649745A/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
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
    • 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
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04588—Control methods or devices therefor, e.g. driver circuits, control circuits using a specific waveform

Abstract

PURPOSE:To obtain a small dot diameter to enable a printing with a high resolving power, by a method wherein, after the extinction of a first drive pulse voltage, a second drive pulse voltage is applied again while an ink column is still discharging. CONSTITUTION:A first drive pulse I is applied to a vibrating unit 3 at a time t1, whereby the vibrating unit 3 is displaced reversely to an ink pressurizing liquid chamber 2. In this manner, the capacity in the liquid chamber 2 is increased, and an ink meniscus surface is pulled towards the liquid chamber 2. After that, at a time t2 the voltage of the first drive pulse I is eliminated, whereby the vibrating unit 3 is returned to an original state. After this voltage extinction, a second drive pulse II is again applied at a time t3 during the discharge of an ink. In this manner, the vibrating unit 3 is again displaced reversely to the ink pressurizing liquid chamber 2, the pressure in the liquid chamber 2 is lowered, an ink column is liquefied only at the tip end part thereof, the remaining part is forcedly pulled back into the liquid chamber 2. After the extiction of the second drive pulse at a time t4, the vibrating unit 3 damps to return into a set-up state.
JP16651087A 1987-07-02 1987-07-02 Method for driving on-demand type ink jet head Pending JPS649745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16651087A JPS649745A (en) 1987-07-02 1987-07-02 Method for driving on-demand type ink jet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16651087A JPS649745A (en) 1987-07-02 1987-07-02 Method for driving on-demand type ink jet head

Publications (1)

Publication Number Publication Date
JPS649745A true JPS649745A (en) 1989-01-13

Family

ID=15832678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16651087A Pending JPS649745A (en) 1987-07-02 1987-07-02 Method for driving on-demand type ink jet head

Country Status (1)

Country Link
JP (1) JPS649745A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988799A (en) * 1995-09-25 1999-11-23 Sharp Kabushiki Kaisha Ink-jet head having ink chamber and non-ink chamber divided by structural element subjected to freckling deformation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988799A (en) * 1995-09-25 1999-11-23 Sharp Kabushiki Kaisha Ink-jet head having ink chamber and non-ink chamber divided by structural element subjected to freckling deformation

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