Invention Grant
- Patent Title: Developing device, process cartridge, method and image forming apparatus for developing an electrostatic latent image on an image carrier
- Patent Title (中): 用于在图像载体上显影静电潜像的显影装置，处理盒，方法和图像形成装置
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Application No.: US12405590Application Date: 2009-03-17
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Publication No.: US08238801B2Publication Date: 2012-08-07
- Inventor: Yasuo Miyoshi , Yoshihiro Fujiwara , Takuya Seshita , Norio Kudo
- Applicant: Yasuo Miyoshi , Yoshihiro Fujiwara , Takuya Seshita , Norio Kudo
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-068645 20080318; JP2008-283864 20081105
- Main IPC: G03G15/06
- IPC: G03G15/06 ; G03G15/08 ; G03G15/09
Abstract:
A developing device, process cartridge method, and image forming apparatus for developing an electrostatic latent image on an image carrier, the developing device including a first carrying member that supplies a developer to a developer carrier at the position of a developer attracting fourth magnetic pole while longitudinally carrying the developer, and a second carrying member that carries the developer released from the developer carrier at the position of a developer releasing third magnetic pole. The developer carrier has two magnetic poles (second and fourth magnetic poles) of the same polarity sandwiching the developer releasing third magnetic pole. Moreover, the developer releasing third magnetic pole is formed by the two magnetic poles (second and fourth magnetic poles) so that the polarity of the developer releasing third magnetic pole differs from the polarity of the two magnetic poles (second and fourth magnetic poles).
Public/Granted literature
- US20090238610A1 DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS Public/Granted day:2009-09-24
Information query
