JPS5476236A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5476236A JPS5476236A JP14357377A JP14357377A JPS5476236A JP S5476236 A JPS5476236 A JP S5476236A JP 14357377 A JP14357377 A JP 14357377A JP 14357377 A JP14357377 A JP 14357377A JP S5476236 A JPS5476236 A JP S5476236A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- development
- poles
- magnetic
- carrier
- 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
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To form a sharp image of rich gradation in high speed, by using 2 sets of devices in the magnetic brush developer of a static latent image and conducting usual sleeve development in the first set and powder clound development in the second set. CONSTITUTION:Two nonmagnetic rotary sleeves 22A, 22B are arranged a little apart from each other in the developing station of static image carrier 1 so as to ratate in the arrow direction. Magentic means for sleeve 22A are formed as a magnetic roller and magnetized poles N2, S2, N2 are arranged each separated at an equal angle near the surface of the roller and most adjacent to the surface of carrier 1. Magnetic means for sleeve 22B are formed as a 4 pole magnetized magnetic roller and poles N2 and S1 are used for scooping and carrying developing powder and poles S3 and S4 are arranged each separated at a predetermined angle theta in the direction reverse to each other from the point most adjacent to the surface of carrier 1 from the magnetic roller. The conventional sleeve development is made in the first development station consisting of sleeve 22a and means 23A and powder cloud development is made in the second development station consisting of sleeve 22B and means 23B.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14357377A JPS5476236A (en) | 1977-11-30 | 1977-11-30 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14357377A JPS5476236A (en) | 1977-11-30 | 1977-11-30 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476236A true JPS5476236A (en) | 1979-06-18 |
Family
ID=15341878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14357377A Pending JPS5476236A (en) | 1977-11-30 | 1977-11-30 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476236A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01319070A (en) * | 1988-06-17 | 1989-12-25 | Minolta Camera Co Ltd | Developing device |
JPH01321459A (en) * | 1988-06-23 | 1989-12-27 | Minolta Camera Co Ltd | Developing device |
JPH02105185A (en) * | 1988-10-14 | 1990-04-17 | Ricoh Co Ltd | Multistage developing device |
-
1977
- 1977-11-30 JP JP14357377A patent/JPS5476236A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01319070A (en) * | 1988-06-17 | 1989-12-25 | Minolta Camera Co Ltd | Developing device |
JPH01321459A (en) * | 1988-06-23 | 1989-12-27 | Minolta Camera Co Ltd | Developing device |
JPH02105185A (en) * | 1988-10-14 | 1990-04-17 | Ricoh Co Ltd | Multistage developing device |
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