JPS5766445A - Controlling method for extent of charging of electrophotographic copying machine - Google Patents

Controlling method for extent of charging of electrophotographic copying machine

Info

Publication number
JPS5766445A
JPS5766445A JP55142266A JP14226680A JPS5766445A JP S5766445 A JPS5766445 A JP S5766445A JP 55142266 A JP55142266 A JP 55142266A JP 14226680 A JP14226680 A JP 14226680A JP S5766445 A JPS5766445 A JP S5766445A
Authority
JP
Japan
Prior art keywords
temperature
charging
extent
copying machine
controlling method
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
JP55142266A
Other languages
Japanese (ja)
Inventor
Katsuhiko Makita
Akio Katsumata
Kazuo Uchimura
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 JP55142266A priority Critical patent/JPS5766445A/en
Publication of JPS5766445A publication Critical patent/JPS5766445A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266—Arrangements for controlling the amount of charge

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To correct a drop in charging potential due to variations in photoreceptor characteristics wtih temperature, by controlling a charger output by detecting the temperature of a photosensitive drum. CONSTITUTION:A thermistor 10 detects the surface temperature of a photosensitive drum 1 and on the basis of the detected value, a control circuit 11 controls a high-voltage power source circuit 2 to vary a voltage applied to a charger 3. The control is only exercised so as to raise the voltage only at >=30 deg.C at which variations in photoreceptor characteristics with temperature are increased.
JP55142266A 1980-10-11 1980-10-11 Controlling method for extent of charging of electrophotographic copying machine Pending JPS5766445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55142266A JPS5766445A (en) 1980-10-11 1980-10-11 Controlling method for extent of charging of electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55142266A JPS5766445A (en) 1980-10-11 1980-10-11 Controlling method for extent of charging of electrophotographic copying machine

Publications (1)

Publication Number Publication Date
JPS5766445A true JPS5766445A (en) 1982-04-22

Family

ID=15311342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55142266A Pending JPS5766445A (en) 1980-10-11 1980-10-11 Controlling method for extent of charging of electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS5766445A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583835A (en) * 1982-12-10 1986-04-22 Ricoh Company, Ltd. Image control device for electrophotographic copier
US4963926A (en) * 1988-05-12 1990-10-16 Mita Industrial Co., Ltd. Electrostatic image forming apparatus with charge controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106336A (en) * 1973-01-18 1974-10-08
JPS5473055A (en) * 1977-11-21 1979-06-12 Minolta Camera Co Ltd Charge quantity controller in electrophotographic copier
JPS5536856A (en) * 1978-09-06 1980-03-14 Matsushita Electric Ind Co Ltd High voltage power source device for electrophotographic copier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106336A (en) * 1973-01-18 1974-10-08
JPS5473055A (en) * 1977-11-21 1979-06-12 Minolta Camera Co Ltd Charge quantity controller in electrophotographic copier
JPS5536856A (en) * 1978-09-06 1980-03-14 Matsushita Electric Ind Co Ltd High voltage power source device for electrophotographic copier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583835A (en) * 1982-12-10 1986-04-22 Ricoh Company, Ltd. Image control device for electrophotographic copier
US4963926A (en) * 1988-05-12 1990-10-16 Mita Industrial Co., Ltd. Electrostatic image forming apparatus with charge controller

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