JPS5711069A - Thermosensitive recording system - Google Patents

Thermosensitive recording system

Info

Publication number
JPS5711069A
JPS5711069A JP8584480A JP8584480A JPS5711069A JP S5711069 A JPS5711069 A JP S5711069A JP 8584480 A JP8584480 A JP 8584480A JP 8584480 A JP8584480 A JP 8584480A JP S5711069 A JPS5711069 A JP S5711069A
Authority
JP
Japan
Prior art keywords
signal
bits
becomes
thermosensitive recording
temperature
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
JP8584480A
Other languages
Japanese (ja)
Inventor
Kunio Yasumi
Shigeru Katsuragi
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 JP8584480A priority Critical patent/JPS5711069A/en
Publication of JPS5711069A publication Critical patent/JPS5711069A/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
    • 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

Landscapes

  • Electronic Switches (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To prevent a thermosensitive recording head from temperature rising while maintaining the contrast of an image under the possible best condition, by thinning a part of an image signal in response to the temperature of the thermosensitive recording head. CONSTITUTION:A signal S3 is one produced by delaying an output signal S2 from a NAND gate 10, which becomes ''0'' only when each bit S/R9 of 24 bits becomes ''1'', by S/R 11 of 12 bits. The signal S3, only when black information contained in a serial signal S1 is 24 bits or more in continuation, synchronizes with the beginging part of the black information and becomes ''0''. The signal S3 becomes one produced by delaying the signal S2, which returns to ''1'' at the final part of the black information, by a value corresponding to a half of a S/R 9 bit number. Consequently, if the temperature of a head 1 during operation rises and exceeds a certain value, only the central part of the block information whose picture element number is 24 bits or more, from the black information contained in an image signal S4 is periodically substituted by white information, so that a heat density generated at the head 1 is lowered to prevent the temperature rising.
JP8584480A 1980-06-26 1980-06-26 Thermosensitive recording system Pending JPS5711069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8584480A JPS5711069A (en) 1980-06-26 1980-06-26 Thermosensitive recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8584480A JPS5711069A (en) 1980-06-26 1980-06-26 Thermosensitive recording system

Publications (1)

Publication Number Publication Date
JPS5711069A true JPS5711069A (en) 1982-01-20

Family

ID=13870170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8584480A Pending JPS5711069A (en) 1980-06-26 1980-06-26 Thermosensitive recording system

Country Status (1)

Country Link
JP (1) JPS5711069A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58146178A (en) * 1982-02-25 1983-08-31 Ricoh Co Ltd Method for controlling thermo sensing head
JPS59224973A (en) * 1983-05-06 1984-12-17 Fuji Xerox Co Ltd Printer controller for facsimile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58146178A (en) * 1982-02-25 1983-08-31 Ricoh Co Ltd Method for controlling thermo sensing head
JPS59224973A (en) * 1983-05-06 1984-12-17 Fuji Xerox Co Ltd Printer controller for facsimile

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