JPS54134438A - Electrophotographic copying method - Google Patents
Electrophotographic copying methodInfo
- Publication number
- JPS54134438A JPS54134438A JP4237178A JP4237178A JPS54134438A JP S54134438 A JPS54134438 A JP S54134438A JP 4237178 A JP4237178 A JP 4237178A JP 4237178 A JP4237178 A JP 4237178A JP S54134438 A JPS54134438 A JP S54134438A
- Authority
- JP
- Japan
- Prior art keywords
- during
- developing
- electrode
- bias voltage
- cleaning operation
- 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 obtain a sufficient cleaing effect, while reducing the charge of a developing agent, by sufficiently charging a one-component magnetic developing agent during the development with a charge injecting elecrode and by varying the bias voltage for impressing the charge injecting electrode during the cleaning operation.
CONSTITUTION: The electrostatic latent imgage 1 on a drum 1 is visualized by a magnetic brush developing device 4 using one-component magnetic developing agent. The device 4 is equipped with an electrode injecting electrode 8 acting as a doctor, and the developing bias voltage Vs is made during development to be of the same polarity to that of the image and to have its difference from the texture potential lower than the development starting value. The electrode 8 is supplied with such a bias voltage VF as has the opposite polarity to that of the image. During the cleaning operation, a change-over switch 11 is interchanged to the position shown in broken line, and the vias voltage VE is made to have its differnce from the voltage Vs smaller than that during the developing operation, thus effecting the cleaning operation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4237178A JPS54134438A (en) | 1978-04-11 | 1978-04-11 | Electrophotographic copying method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4237178A JPS54134438A (en) | 1978-04-11 | 1978-04-11 | Electrophotographic copying method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54134438A true JPS54134438A (en) | 1979-10-18 |
Family
ID=12634176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4237178A Pending JPS54134438A (en) | 1978-04-11 | 1978-04-11 | Electrophotographic copying method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54134438A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5282007A (en) * | 1991-06-25 | 1994-01-25 | Murata Kikai Kabushiki Kaisha | Cleanerless image forming method |
-
1978
- 1978-04-11 JP JP4237178A patent/JPS54134438A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5282007A (en) * | 1991-06-25 | 1994-01-25 | Murata Kikai Kabushiki Kaisha | Cleanerless image forming method |
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