JPS5752064A - Electronic copying machine - Google Patents

Electronic copying machine

Info

Publication number
JPS5752064A
JPS5752064A JP55126968A JP12696880A JPS5752064A JP S5752064 A JPS5752064 A JP S5752064A JP 55126968 A JP55126968 A JP 55126968A JP 12696880 A JP12696880 A JP 12696880A JP S5752064 A JPS5752064 A JP S5752064A
Authority
JP
Japan
Prior art keywords
light source
exposure light
exposure
circuit
charging device
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
JP55126968A
Other languages
Japanese (ja)
Inventor
Kenta Watase
Takaaki Miyashita
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 JP55126968A priority Critical patent/JPS5752064A/en
Publication of JPS5752064A publication Critical patent/JPS5752064A/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
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To reduce electric power consumption, by lighting the exposure light source just before the exposure light source is positioned to the end part of manuscripts, and turning off the exposure light source just after the light source completed the exposure of image lights of manuscripts. CONSTITUTION:This electronic copying machine has a mechanism in which a power source lighting circuit 6a is closed when a pulse signal is generated and an exposure light source 6 is turned on. Then, a central controlling circuit 48 gives the output to the electric current supplying circuit of an electricity charging device 19 and operates the electricity charging device 19 after a time ts which is equal to a period from a time point where a manuscript 2 is detected by a manuscript size sensor 10 to another time point where exposure to the manuscript 2 is started by the exposure light source 6, is passed from a time point where the pulse signal of a signal converting circuit 45 is generated. Then, the central controlling circuit 48 stops the working of the electricity charging device 19, etc., and turns off the exposure light source 6 after an appropriate time passed. In this way, the exposure light source is turned on only for necessary time and, therefore, its electric power consumption can be reduced.
JP55126968A 1980-09-12 1980-09-12 Electronic copying machine Pending JPS5752064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55126968A JPS5752064A (en) 1980-09-12 1980-09-12 Electronic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55126968A JPS5752064A (en) 1980-09-12 1980-09-12 Electronic copying machine

Publications (1)

Publication Number Publication Date
JPS5752064A true JPS5752064A (en) 1982-03-27

Family

ID=14948347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55126968A Pending JPS5752064A (en) 1980-09-12 1980-09-12 Electronic copying machine

Country Status (1)

Country Link
JP (1) JPS5752064A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59162538A (en) * 1983-03-08 1984-09-13 Iwatsu Electric Co Ltd Exposure scanning controller of electrophotographic plate making machine
JPS6136732A (en) * 1984-07-30 1986-02-21 Fuji Xerox Co Ltd Automatic original size detector of copying machine
JPS61286838A (en) * 1986-02-19 1986-12-17 Ricoh Co Ltd Original size detecting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084245A (en) * 1973-11-24 1975-07-08
JPS5425838A (en) * 1977-07-29 1979-02-27 Minolta Camera Co Ltd Temperature rise preventing device by exposure lamp of electrophotographic copiers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084245A (en) * 1973-11-24 1975-07-08
JPS5425838A (en) * 1977-07-29 1979-02-27 Minolta Camera Co Ltd Temperature rise preventing device by exposure lamp of electrophotographic copiers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59162538A (en) * 1983-03-08 1984-09-13 Iwatsu Electric Co Ltd Exposure scanning controller of electrophotographic plate making machine
JPS6136732A (en) * 1984-07-30 1986-02-21 Fuji Xerox Co Ltd Automatic original size detector of copying machine
JPS61286838A (en) * 1986-02-19 1986-12-17 Ricoh Co Ltd Original size detecting device

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