JPS5680069A - Developing device for two-color electrophotography - Google Patents
Developing device for two-color electrophotographyInfo
- Publication number
- JPS5680069A JPS5680069A JP15771779A JP15771779A JPS5680069A JP S5680069 A JPS5680069 A JP S5680069A JP 15771779 A JP15771779 A JP 15771779A JP 15771779 A JP15771779 A JP 15771779A JP S5680069 A JPS5680069 A JP S5680069A
- Authority
- JP
- Japan
- Prior art keywords
- developing
- color toner
- devices
- color
- plate
- 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
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE: To prevent the entry of different color toners by the simple constitution provided with a member which selectively shields the openings in the developing positions of the 1st and 2nd developing devices.
CONSTITUTION: The 1st, 2nd developing devices 17, 19 are made into one unit by a housing 25, and a red color toner and a black color toner are contained separately in the respective devices. The developing openings where the respective devices approach to the photoreceptor surface are so constituted as to be selectively shielded by means of a shielding plate 35 which is turnable around the central shaft 36 of the photosensitive drum. At the time of two-color developing, said plate positions at the intermediate of both devieces, but when block color developing is going to be made by using the 2nd device 19 alone, the opening of the 1st device 17 is closed by the plate 35; therefore, the entry of the black color toner scattered at the developing with the 2nd device 19 into the 1st device 17 may be prevented.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15771779A JPS5680069A (en) | 1979-12-05 | 1979-12-05 | Developing device for two-color electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15771779A JPS5680069A (en) | 1979-12-05 | 1979-12-05 | Developing device for two-color electrophotography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5680069A true JPS5680069A (en) | 1981-07-01 |
Family
ID=15655826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15771779A Pending JPS5680069A (en) | 1979-12-05 | 1979-12-05 | Developing device for two-color electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5680069A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6067975A (en) * | 1983-09-22 | 1985-04-18 | Ricoh Co Ltd | Developing device |
| JPS60135968A (en) * | 1983-12-23 | 1985-07-19 | Sharp Corp | Copying machine |
| JPS60238872A (en) * | 1984-05-11 | 1985-11-27 | Fuji Xerox Co Ltd | Developing device |
| JPS61129665A (en) * | 1984-11-29 | 1986-06-17 | Canon Inc | Developing device |
| JPS61133965A (en) * | 1984-12-05 | 1986-06-21 | Canon Inc | Developing device for multi-color image forming device |
| JPH0219878A (en) * | 1988-05-20 | 1990-01-23 | Xerox Corp | Developing apparatus for electrostatic latent image |
-
1979
- 1979-12-05 JP JP15771779A patent/JPS5680069A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6067975A (en) * | 1983-09-22 | 1985-04-18 | Ricoh Co Ltd | Developing device |
| JPS60135968A (en) * | 1983-12-23 | 1985-07-19 | Sharp Corp | Copying machine |
| JPS60238872A (en) * | 1984-05-11 | 1985-11-27 | Fuji Xerox Co Ltd | Developing device |
| JPH0564346B2 (en) * | 1984-05-11 | 1993-09-14 | Fuji Xerox Co Ltd | |
| JPS61129665A (en) * | 1984-11-29 | 1986-06-17 | Canon Inc | Developing device |
| JPS61133965A (en) * | 1984-12-05 | 1986-06-21 | Canon Inc | Developing device for multi-color image forming device |
| JPH0219878A (en) * | 1988-05-20 | 1990-01-23 | Xerox Corp | Developing apparatus for electrostatic latent image |
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