JPS5654456A - Fog preventing method - Google Patents
Fog preventing methodInfo
- Publication number
- JPS5654456A JPS5654456A JP13112979A JP13112979A JPS5654456A JP S5654456 A JPS5654456 A JP S5654456A JP 13112979 A JP13112979 A JP 13112979A JP 13112979 A JP13112979 A JP 13112979A JP S5654456 A JPS5654456 A JP S5654456A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- use number
- developer
- accordance
- polarity
- 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
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To obtain an always fogfree image, by changing bias voltage to be applied to a control grating in accordance with a repeated use number of a photoreceptor or a developer, and converting polarity of toner charge attached to the photoreceptor into the opposite one.
CONSTITUTION: A rotation number of a drum or a sleeve roller is measured in accordance with use number total 21 of a photoreceptor or use number total 22 of a developer. An output value of bias voltage source 23 is gradually changed to change potential of control grating 24 of corona discharger 17 prior to transfer. As a result, when the use number of the photoreceptor or the developer rises, the bias voltage rises in accordance with its rise, an accelerating electric field of corona discharge reverse in polarity to a charged toner is always active, thus permitting a fogging toner to be converted in polarity, and an always fogfree copy image to be obtained without being transferred by it.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13112979A JPS5654456A (en) | 1979-10-11 | 1979-10-11 | Fog preventing method |
US06/191,030 US4402591A (en) | 1979-09-29 | 1980-09-26 | Electrophotographic apparatus |
DE19803036731 DE3036731A1 (en) | 1979-09-29 | 1980-09-29 | ELECTROPHOTOGRAPHIC DEVICE |
GB8031336A GB2062548B (en) | 1979-09-29 | 1980-09-29 | Electrophotographic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13112979A JPS5654456A (en) | 1979-10-11 | 1979-10-11 | Fog preventing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5654456A true JPS5654456A (en) | 1981-05-14 |
Family
ID=15050654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13112979A Pending JPS5654456A (en) | 1979-09-29 | 1979-10-11 | Fog preventing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5654456A (en) |
-
1979
- 1979-10-11 JP JP13112979A patent/JPS5654456A/en active Pending
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