JPS57188051A - Detecting system of synchronizing mark - Google Patents

Detecting system of synchronizing mark

Info

Publication number
JPS57188051A
JPS57188051A JP56073101A JP7310181A JPS57188051A JP S57188051 A JPS57188051 A JP S57188051A JP 56073101 A JP56073101 A JP 56073101A JP 7310181 A JP7310181 A JP 7310181A JP S57188051 A JPS57188051 A JP S57188051A
Authority
JP
Japan
Prior art keywords
synchronizing
synchronizing mark
detection signal
mark
timer
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
JP56073101A
Other languages
Japanese (ja)
Inventor
Shigeru Yamazaki
Masakazu Niro
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 JP56073101A priority Critical patent/JPS57188051A/en
Publication of JPS57188051A publication Critical patent/JPS57188051A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/14—Electronic sequencing control
    • G03G21/145—Electronic sequencing control wherein control pulses are generated by the mechanical movement of parts of the machine, e.g. the photoconductor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To deliver only the normal synchronizing mark detection signal, by invalidating the synchronizing mark detection signal of a photoreceptor excepting those of the prescribed timing. CONSTITUTION:A synchronizing mark 2 of a photoreceptor 1 for synchronizing control functions to inhibit the formation of an image at a joint part, etc. of the receptor 1. When the detection signal of the mark 2 is applied to a timer 5 via an AND gate 7, the output of the timer 5 is set at a high level. Thus the gate 7 is closed via an inverter 6 to invalidate the synchronizing mark inhibition signal excepting those of the prescribed timing. The time-up period of the timer 5 is slightly shorter than the detecting cycle period of the synchronizing mark of the prescribed timing. The gate 7 is opened again immediately before the following detecting cycle. As a result, only the normal synchronizing mark detection signal is delivered to prevent the process malfunction of a copying device.
JP56073101A 1981-05-15 1981-05-15 Detecting system of synchronizing mark Pending JPS57188051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56073101A JPS57188051A (en) 1981-05-15 1981-05-15 Detecting system of synchronizing mark

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56073101A JPS57188051A (en) 1981-05-15 1981-05-15 Detecting system of synchronizing mark

Publications (1)

Publication Number Publication Date
JPS57188051A true JPS57188051A (en) 1982-11-18

Family

ID=13508589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56073101A Pending JPS57188051A (en) 1981-05-15 1981-05-15 Detecting system of synchronizing mark

Country Status (1)

Country Link
JP (1) JPS57188051A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59212853A (en) * 1983-05-18 1984-12-01 Fuji Xerox Co Ltd Abnormality detector of copying machine
JPS59212852A (en) * 1983-05-18 1984-12-01 Fuji Xerox Co Ltd Abnormality detector of copying machine
EP0283989A2 (en) * 1987-03-23 1988-09-28 Colorocs Corporation Belt synchronization controls in a print engine for color electrophotography

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157723A (en) * 1979-05-28 1980-12-08 Canon Inc Beam deflecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157723A (en) * 1979-05-28 1980-12-08 Canon Inc Beam deflecting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59212853A (en) * 1983-05-18 1984-12-01 Fuji Xerox Co Ltd Abnormality detector of copying machine
JPS59212852A (en) * 1983-05-18 1984-12-01 Fuji Xerox Co Ltd Abnormality detector of copying machine
EP0283989A2 (en) * 1987-03-23 1988-09-28 Colorocs Corporation Belt synchronization controls in a print engine for color electrophotography

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