JPS5577764A - Pressure developing device - Google Patents
Pressure developing deviceInfo
- Publication number
- JPS5577764A JPS5577764A JP15169178A JP15169178A JPS5577764A JP S5577764 A JPS5577764 A JP S5577764A JP 15169178 A JP15169178 A JP 15169178A JP 15169178 A JP15169178 A JP 15169178A JP S5577764 A JPS5577764 A JP S5577764A
- Authority
- JP
- Japan
- Prior art keywords
- pressure roller
- photosensitive
- pressure
- photosensitive drum
- developer
- 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 perform development free from ground stains by forming a pressure roller with expandable material. CONSTITUTION:The pressure roller 3 of a pressure development device 2 which develops electrostatic latent images formed on a photosensitive drum 1 is formed by covering a thin film 32 composed of conductive material on the surface of a roller body 31 composed of expandable conductive elastic material. If with this arrangement the force for pressing the pressure roller 3 to the photosensitive surface of the photosensitive drum 1 is set relatively large, the pressure being exerted per unit area of the photosensitive surface becomes extremely small, whereby the occurrence of the physical deposition of developer is prevented. Hence, when the magnetic brush formed on the ouside circumferntial surface of a sleeve 43 is deposited on the surface of the pressure roller 3 and the developer is deposited on the electrostatic latent images formed on the photosensitive surface through contact with the photosensitive surface of the photosensitive drum 1, the stable development free from ground stains as against mechanical vibrations of the device is accomplished.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15169178A JPS5577764A (en) | 1978-12-07 | 1978-12-07 | Pressure developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15169178A JPS5577764A (en) | 1978-12-07 | 1978-12-07 | Pressure developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577764A true JPS5577764A (en) | 1980-06-11 |
Family
ID=15524147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15169178A Pending JPS5577764A (en) | 1978-12-07 | 1978-12-07 | Pressure developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577764A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4791882A (en) * | 1986-10-08 | 1988-12-20 | Minolta Camera Kabushiki Kaisha | Loosely mounted outer sleeve member with biasing means |
US5057871A (en) * | 1989-03-16 | 1991-10-15 | Fujitsu Limited | Developing device having a conductive porous toner-removing roller |
US5062385A (en) * | 1989-05-11 | 1991-11-05 | Fujitsu Limited | Open-cell foam developing roller |
US5076201A (en) * | 1989-03-16 | 1991-12-31 | Fujitsu Limited | Developing device used in electrophotographic field and method of producing developing roller incorporated therein |
US5097294A (en) * | 1989-03-20 | 1992-03-17 | Fujitsu Limited | Developing device used in electrophotographic field with a one-component developer and having a blade member for developer layer thickness regulation |
US5164773A (en) * | 1989-06-21 | 1992-11-17 | Fujitsu Limited | Developing device used in electrophotographic field |
US5548382A (en) * | 1989-08-01 | 1996-08-20 | Fujitsu Limited | Developing apparatus for improving the durability of the latent image holding member |
US5557060A (en) * | 1992-06-02 | 1996-09-17 | Seiko Epson Corporation | Developing device |
US5832350A (en) * | 1996-01-09 | 1998-11-03 | Hitachi, Ltd. | Developing apparatus and color electrophotographic apparatus using the same |
US8073369B2 (en) | 2007-07-23 | 2011-12-06 | Ricoh Company, Ltd. | Development device transferring only a toner layer to a developing roller and image apparatus using the same |
-
1978
- 1978-12-07 JP JP15169178A patent/JPS5577764A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4791882A (en) * | 1986-10-08 | 1988-12-20 | Minolta Camera Kabushiki Kaisha | Loosely mounted outer sleeve member with biasing means |
US5057871A (en) * | 1989-03-16 | 1991-10-15 | Fujitsu Limited | Developing device having a conductive porous toner-removing roller |
US5076201A (en) * | 1989-03-16 | 1991-12-31 | Fujitsu Limited | Developing device used in electrophotographic field and method of producing developing roller incorporated therein |
US5097294A (en) * | 1989-03-20 | 1992-03-17 | Fujitsu Limited | Developing device used in electrophotographic field with a one-component developer and having a blade member for developer layer thickness regulation |
US5062385A (en) * | 1989-05-11 | 1991-11-05 | Fujitsu Limited | Open-cell foam developing roller |
US5164773A (en) * | 1989-06-21 | 1992-11-17 | Fujitsu Limited | Developing device used in electrophotographic field |
US5548382A (en) * | 1989-08-01 | 1996-08-20 | Fujitsu Limited | Developing apparatus for improving the durability of the latent image holding member |
US5557060A (en) * | 1992-06-02 | 1996-09-17 | Seiko Epson Corporation | Developing device |
US5655197A (en) * | 1992-06-02 | 1997-08-05 | Seiko Epson Corporation | Developing device |
US5832350A (en) * | 1996-01-09 | 1998-11-03 | Hitachi, Ltd. | Developing apparatus and color electrophotographic apparatus using the same |
US8073369B2 (en) | 2007-07-23 | 2011-12-06 | Ricoh Company, Ltd. | Development device transferring only a toner layer to a developing roller and image apparatus using the same |
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