JPS5577764A - Pressure developing device - Google Patents

Pressure developing device

Info

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
Application number
JP15169178A
Other languages
Japanese (ja)
Inventor
Yasuo Hosaka
Masazumi Yana
Hitoshi Yoneda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15169178A priority Critical patent/JPS5577764A/en
Publication of JPS5577764A publication Critical patent/JPS5577764A/en
Pending legal-status Critical Current

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.
JP15169178A 1978-12-07 1978-12-07 Pressure developing device Pending JPS5577764A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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