JPS5557857A - Control method of electrophotographic copier - Google Patents

Control method of electrophotographic copier

Info

Publication number
JPS5557857A
JPS5557857A JP13095978A JP13095978A JPS5557857A JP S5557857 A JPS5557857 A JP S5557857A JP 13095978 A JP13095978 A JP 13095978A JP 13095978 A JP13095978 A JP 13095978A JP S5557857 A JPS5557857 A JP S5557857A
Authority
JP
Japan
Prior art keywords
sheet
copy
charging
corotron
copying
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
JP13095978A
Other languages
Japanese (ja)
Inventor
Shigeru Sadamatsu
Kozo Oka
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP13095978A priority Critical patent/JPS5557857A/en
Publication of JPS5557857A publication Critical patent/JPS5557857A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To prevent staining of the background of the copy and make image density constant by compensating the change in charging characteristics along with the repetitive use of a photoreceptor through controlling of the input value in at least one of copying processes.
CONSTITUTION: When the corotron applied voltages in the primary charging and secondary charging based on the end detection signal of copying of the first sheet and the detection signal to the effect that it is copying of the second sheet in the case of obtaining the first one sheet of copy and obtaining the second sheet of copy are let to be V1, V2 respectively, then the respective corotron applied voltages V1,2, V2,2 in the second sheet are calculated by formula I and formula II. This calculation is executed in a central processing unit 5. The applied voltages to Corotron are changed through changing over of the internal resistance of the power source in the charging device through an output unit 6, whereby the charging of the second sheet is accomplished. In this way, the staining of the background part of the copy may be prevented and image density may be made constant.
COPYRIGHT: (C)1980,JPO&Japio
JP13095978A 1978-10-24 1978-10-24 Control method of electrophotographic copier Pending JPS5557857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13095978A JPS5557857A (en) 1978-10-24 1978-10-24 Control method of electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13095978A JPS5557857A (en) 1978-10-24 1978-10-24 Control method of electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5557857A true JPS5557857A (en) 1980-04-30

Family

ID=15046624

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13095978A Pending JPS5557857A (en) 1978-10-24 1978-10-24 Control method of electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5557857A (en)

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