JPS5515176A - Electrophotographic copying method - Google Patents
Electrophotographic copying methodInfo
- Publication number
- JPS5515176A JPS5515176A JP8862078A JP8862078A JPS5515176A JP S5515176 A JPS5515176 A JP S5515176A JP 8862078 A JP8862078 A JP 8862078A JP 8862078 A JP8862078 A JP 8862078A JP S5515176 A JPS5515176 A JP S5515176A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- cleaning
- toner
- drum
- roller
- 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
- Developing For Electrophotography (AREA)
Abstract
PURPOSE: To obtain good cleaning effect without complicating a device, by applying proper different voltages in developing and cleaning in a copying method using a one-component type developer consisting mainly of a nonmagnetic toner.
CONSTITUTION: In the copier using a nonmagnetic one-component type toner and operating development and cleaning in the same device, developing bias voltage VS to be applied to roller 7 in developing is made positive like an electrostatic latent image and the difference between voltage VS and voltage VN is made smaller than development start voltage VK. On the other hand, toner supplied from hopper 8 is negatively charged by voltage VE of charge injection ielectrode 9 and moves to the image section of drum 1 kept at higher voltage VI than that of roller 7, thus the latent image is developed. In cleaning, the difference between lowered voltage VI' and constant bias voltage VS is set to a value lower than voltage VK, voltage VE to be applied to electrode 9 is made positive, thus permitting the difference between voltages VE and VS to be reduced, the charge amount of the toner to decrease, attachment to drum 1 to be prevented, and further, the residual toner on drum 1 to be removed with roller 7 for cleaning.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8862078A JPS5515176A (en) | 1978-07-20 | 1978-07-20 | Electrophotographic copying method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8862078A JPS5515176A (en) | 1978-07-20 | 1978-07-20 | Electrophotographic copying method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5515176A true JPS5515176A (en) | 1980-02-02 |
Family
ID=13947840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8862078A Pending JPS5515176A (en) | 1978-07-20 | 1978-07-20 | Electrophotographic copying method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5515176A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH034276A (en) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | Recorder |
JPH034277A (en) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | Recorder |
-
1978
- 1978-07-20 JP JP8862078A patent/JPS5515176A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH034276A (en) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | Recorder |
JPH034277A (en) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | Recorder |
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