JPS5548767A - Electrostatic latent image developing device - Google Patents
Electrostatic latent image developing deviceInfo
- Publication number
- JPS5548767A JPS5548767A JP12110078A JP12110078A JPS5548767A JP S5548767 A JPS5548767 A JP S5548767A JP 12110078 A JP12110078 A JP 12110078A JP 12110078 A JP12110078 A JP 12110078A JP S5548767 A JPS5548767 A JP S5548767A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- omegacm
- layer
- silicone rubber
- thin
- 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.)
- Granted
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To provide the device which sufficiently charges the toner and obtain distinct copied images of high contrast by letting the surface of a developer donating member be an insulation layer of more than 10<12>OMEGAcm and the portion on the inner side thereof be a conductive layer of less than 10<8>OMEGAcm. CONSTITUTION:A developer donating member 10, which carries the toner on its surface, comprises bonding an inner layer part 10b composed of silicone rubber compounded with carbon black and applied with conduction treatment on a core member 10a made of stainless steel and having an extremely thin insulation thin layer 10c coated with the ordinary silicone rubber not applied with conduction treatment thereon. The silicone rubber of the insulation thin layer 10c is an insulator of more than 10<12>OMEGAcm in specific volume resistivity and about 50mum or under in thickness and the silicone rubber of the inner layer part 10b is a conductor of less than 10<8>OMEGAcm in specific volume resistivity and about 7mm in thickness. Such constitution enables the toner to be sufficiently charged even when the resistance value of the toner is thin and even when the toner layer is thin, thus making it possible to obtain the distinct copied images of high contrast.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12110078A JPS5548767A (en) | 1978-09-30 | 1978-09-30 | Electrostatic latent image developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12110078A JPS5548767A (en) | 1978-09-30 | 1978-09-30 | Electrostatic latent image developing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5548767A true JPS5548767A (en) | 1980-04-08 |
JPS6219749B2 JPS6219749B2 (en) | 1987-04-30 |
Family
ID=14802867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12110078A Granted JPS5548767A (en) | 1978-09-30 | 1978-09-30 | Electrostatic latent image developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548767A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61112173A (en) * | 1984-11-06 | 1986-05-30 | Ricoh Co Ltd | Developing device |
JPS6299771A (en) * | 1985-10-28 | 1987-05-09 | Ricoh Co Ltd | Developing device |
JPS6299772A (en) * | 1985-10-28 | 1987-05-09 | Ricoh Co Ltd | Developing device |
JPS6420581A (en) * | 1987-07-16 | 1989-01-24 | Minolta Camera Kk | Developing device |
JPH02138759U (en) * | 1989-01-18 | 1990-11-20 | ||
JPH08272213A (en) * | 1996-04-08 | 1996-10-18 | Ricoh Co Ltd | Developing device |
US5875379A (en) * | 1996-08-23 | 1999-02-23 | Minolta Co., Ltd. | Developing device capable of preventing cracking of developer due to pressing of a developer layer controlling member |
-
1978
- 1978-09-30 JP JP12110078A patent/JPS5548767A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61112173A (en) * | 1984-11-06 | 1986-05-30 | Ricoh Co Ltd | Developing device |
JPS6299771A (en) * | 1985-10-28 | 1987-05-09 | Ricoh Co Ltd | Developing device |
JPS6299772A (en) * | 1985-10-28 | 1987-05-09 | Ricoh Co Ltd | Developing device |
JPS6420581A (en) * | 1987-07-16 | 1989-01-24 | Minolta Camera Kk | Developing device |
JPH02138759U (en) * | 1989-01-18 | 1990-11-20 | ||
JPH08272213A (en) * | 1996-04-08 | 1996-10-18 | Ricoh Co Ltd | Developing device |
US5875379A (en) * | 1996-08-23 | 1999-02-23 | Minolta Co., Ltd. | Developing device capable of preventing cracking of developer due to pressing of a developer layer controlling member |
Also Published As
Publication number | Publication date |
---|---|
JPS6219749B2 (en) | 1987-04-30 |
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