JPS5677851A - Method for controlling surface potential of photoreceptor of electrophotographic copier - Google Patents
Method for controlling surface potential of photoreceptor of electrophotographic copierInfo
- Publication number
- JPS5677851A JPS5677851A JP15299579A JP15299579A JPS5677851A JP S5677851 A JPS5677851 A JP S5677851A JP 15299579 A JP15299579 A JP 15299579A JP 15299579 A JP15299579 A JP 15299579A JP S5677851 A JPS5677851 A JP S5677851A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- surface potential
- optical system
- copying
- charging
- 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
Links
Abstract
PURPOSE: To make possible the copying of always constant image quality by performing the measurement of the surface potential of a photoreceptor and the controlling of a high-voltage power source for charging prior to each copying.
CONSTITUTION: A photoreceptor surface potential sensor 8 is provided between a charging electrode 2 provided near a drumlike photoreceptor 4 and the exposed part 6 of the photoreceptor 4. At the copying of the 1st sheet, and before an optical system moves after switching on of a start switch, the surface potential of the photoreceptor is measured and the high-voltage power source for charging is controlled based on the measured potential, whereby the surface potential of the photoreceptor is maintained at a predetermined value during the forward moving period of the optical system. On the other hand, for the 2nd and subsequent sheets in the case of continuous copying, the surface potential of the photoreceptor is measured during the moving period of the optical system in copying just before the same and based on the measured potential the power source for charging is controlled prior to the next movement of the optical system, whereby the surface potential of the photoreceptor is maintained at a predetermined value during the next forward moving period of the optical system.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15299579A JPS5677851A (en) | 1979-11-28 | 1979-11-28 | Method for controlling surface potential of photoreceptor of electrophotographic copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15299579A JPS5677851A (en) | 1979-11-28 | 1979-11-28 | Method for controlling surface potential of photoreceptor of electrophotographic copier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5677851A true JPS5677851A (en) | 1981-06-26 |
Family
ID=15552644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15299579A Pending JPS5677851A (en) | 1979-11-28 | 1979-11-28 | Method for controlling surface potential of photoreceptor of electrophotographic copier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5677851A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09244353A (en) * | 1996-03-14 | 1997-09-19 | Ricoh Co Ltd | Image forming device |
-
1979
- 1979-11-28 JP JP15299579A patent/JPS5677851A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09244353A (en) * | 1996-03-14 | 1997-09-19 | Ricoh Co Ltd | Image forming device |
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