JPS5670575A - Electrophotographic copier - Google Patents

Electrophotographic copier

Info

Publication number
JPS5670575A
JPS5670575A JP14739879A JP14739879A JPS5670575A JP S5670575 A JPS5670575 A JP S5670575A JP 14739879 A JP14739879 A JP 14739879A JP 14739879 A JP14739879 A JP 14739879A JP S5670575 A JPS5670575 A JP S5670575A
Authority
JP
Japan
Prior art keywords
turned
switch
voltage value
control circuit
development
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
JP14739879A
Other languages
Japanese (ja)
Inventor
Kenjiyu Oka
Kenichi Wada
Susumu Tanaka
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP14739879A priority Critical patent/JPS5670575A/en
Publication of JPS5670575A publication Critical patent/JPS5670575A/en
Pending legal-status Critical Current

Links

Landscapes

  • Developing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

PURPOSE: To eliminate the need for complicate mechanism by permitting a control circuit to vary the voltage value of a development bias depending upon the time also when a switching element was turned on previously.
CONSTITUTION: Control circuit CS for development bias voltage value control functions to vary the voltage value of a development bias applied to development sleeve 3 when switch S1 is turned on depending upon the time when switch S1 was turned off before it is turned on. Further, it has the 2nd function of gradually increasing the voltage value of the development bias applied to development sleeve 3 up to a constant value while switch S1 is turned on. Then this control circuit CS has capacitor C1 that starts charging operation by bias power source E1 via resistances R1 and R2 as switch S1 turned on and starts discharging operation via resistance R3 as switch S1 is turned off and both the functions are alternated according to the charge and discharge states of this capacitor C1.
COPYRIGHT: (C)1981,JPO&Japio
JP14739879A 1979-11-13 1979-11-13 Electrophotographic copier Pending JPS5670575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14739879A JPS5670575A (en) 1979-11-13 1979-11-13 Electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14739879A JPS5670575A (en) 1979-11-13 1979-11-13 Electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5670575A true JPS5670575A (en) 1981-06-12

Family

ID=15429370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14739879A Pending JPS5670575A (en) 1979-11-13 1979-11-13 Electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5670575A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0293671A (en) * 1988-09-30 1990-04-04 Toshiba Corp Developing method
CN101556448B (en) 2008-04-08 2012-07-11 夏普株式会社 Image forming apparatus and method for controlling image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0293671A (en) * 1988-09-30 1990-04-04 Toshiba Corp Developing method
CN101556448B (en) 2008-04-08 2012-07-11 夏普株式会社 Image forming apparatus and method for controlling image forming apparatus

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