JPS57197178A - Control system of print head - Google Patents

Control system of print head

Info

Publication number
JPS57197178A
JPS57197178A JP8346681A JP8346681A JPS57197178A JP S57197178 A JPS57197178 A JP S57197178A JP 8346681 A JP8346681 A JP 8346681A JP 8346681 A JP8346681 A JP 8346681A JP S57197178 A JPS57197178 A JP S57197178A
Authority
JP
Japan
Prior art keywords
temperature
printing
print
print head
displacement
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
JP8346681A
Other languages
Japanese (ja)
Inventor
Akio Sannomiya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8346681A priority Critical patent/JPS57197178A/en
Publication of JPS57197178A publication Critical patent/JPS57197178A/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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/365—Print density control by compensation for variation in temperature
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection

Abstract

PURPOSE:To prevent missing of dot etc. from occurring by a method wherein when the temperature of a print head detected at the start of printing does not reach the desired value the print wire of the print head is driven, controlled and preheated by the desired displacement that does not reach a printing displacement. CONSTITUTION:At the beginning of printing a temperature detecting signal SC of a temperature sensor 24 is inputted to the print controlling part 20. When the signal SC does not reach the preset temperature, usually a driving signal with a determined frequency higher than the driving frequency in the midst of printing operation is given to each head coil H1, H2, etc. of the print head 23 from the print controlling port 20 and each print wire is driven and controlled by a displacement not exceed the printing displacement. Accordingly the temperature of the print head 23 is lifted, when the detected temperature of the temperature sensor 24 exceeds the preset value, the preheating performance is stopped and normal printing operation is started in accordance with alphabetical codes CC inputted.
JP8346681A 1981-05-30 1981-05-30 Control system of print head Pending JPS57197178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8346681A JPS57197178A (en) 1981-05-30 1981-05-30 Control system of print head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8346681A JPS57197178A (en) 1981-05-30 1981-05-30 Control system of print head

Publications (1)

Publication Number Publication Date
JPS57197178A true JPS57197178A (en) 1982-12-03

Family

ID=13803239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8346681A Pending JPS57197178A (en) 1981-05-30 1981-05-30 Control system of print head

Country Status (1)

Country Link
JP (1) JPS57197178A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705412A (en) * 1982-12-17 1987-11-10 Citizen Watch Co., Ltd. Protection circuit for drive transistor of printer head
US5017027A (en) * 1988-08-22 1991-05-21 Seiko Epson Corporation Impact printer
JPH0461766A (en) * 1990-06-28 1992-02-27 Toshiba Electric Appliance Co Ltd Electric wire connecting structure
US5186550A (en) * 1988-08-22 1993-02-16 Seiko Epson Corporation Impact printer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705412A (en) * 1982-12-17 1987-11-10 Citizen Watch Co., Ltd. Protection circuit for drive transistor of printer head
US5017027A (en) * 1988-08-22 1991-05-21 Seiko Epson Corporation Impact printer
US5186550A (en) * 1988-08-22 1993-02-16 Seiko Epson Corporation Impact printer
JPH0461766A (en) * 1990-06-28 1992-02-27 Toshiba Electric Appliance Co Ltd Electric wire connecting structure

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