JPS6478267A - Copying device - Google Patents
Copying deviceInfo
- Publication number
- JPS6478267A JPS6478267A JP62235989A JP23598987A JPS6478267A JP S6478267 A JPS6478267 A JP S6478267A JP 62235989 A JP62235989 A JP 62235989A JP 23598987 A JP23598987 A JP 23598987A JP S6478267 A JPS6478267 A JP S6478267A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- copying
- speed
- developing devices
- developing
- 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
- Photoreceptors In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
PURPOSE:To use a photosensitive body in a copying device provided with plural developing devices without lowering a copying efficiency by changing the relative speed of the photosensitive body and the developing device which is used for development according to the developing device which is used for development. CONSTITUTION:In order to obtain the potential of the surface of the photosensitive drum 1 corresponding to all white of an original in the positions of the developing devices 31 and 32, it is necessary to lower the rotary speed of the photosensitive drum 1-150mm/s, especially, in the 1st developing device 31 since the electric potential is not fully lowered by the time exposing position attains the developing devices 31 and 32 if the rotary speed of the photosensitive drum 1 is comparatively large. Thus, the titled device uses a carrier-life type one which can perform high speed copying as the photosensitive drum and provides plural developing devices, then it changes the rotating speed of the photosensitive drum according as which developing device is used. Therefore, in case of using black toner whose use frequency is high, copying can be performed at high speed and also color toner can be used by lowering the rotating speed of the photosensitive drum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235989A JPS6478267A (en) | 1987-09-19 | 1987-09-19 | Copying device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235989A JPS6478267A (en) | 1987-09-19 | 1987-09-19 | Copying device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478267A true JPS6478267A (en) | 1989-03-23 |
Family
ID=16994163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62235989A Pending JPS6478267A (en) | 1987-09-19 | 1987-09-19 | Copying device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478267A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0602853A2 (en) * | 1992-12-18 | 1994-06-22 | Xerox Corporation | System and method for operating a multitone imaging apparatus |
-
1987
- 1987-09-19 JP JP62235989A patent/JPS6478267A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0602853A2 (en) * | 1992-12-18 | 1994-06-22 | Xerox Corporation | System and method for operating a multitone imaging apparatus |
EP0602853A3 (en) * | 1992-12-18 | 1995-09-13 | Xerox Corp | System and method for operating a multitone imaging apparatus. |
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