Invention Grant
- Patent Title: Developing device, process cartridge, and image forming apparatus
- Patent Title (中): 显影装置，处理盒和成像装置
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Application No.: US12422554Application Date: 2009-04-13
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Publication No.: US08041267B2Publication Date: 2011-10-18
- Inventor: Yoshinori Nakagawa , Yasuyuki Ishii , Masaaki Yamada , Hideki Kosugi , Tomoko Takahashi , Ichiro Kadota
- Applicant: Yoshinori Nakagawa , Yasuyuki Ishii , Masaaki Yamada , Hideki Kosugi , Tomoko Takahashi , Ichiro Kadota
- 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: JP2008-105461 20080415
- Main IPC: G03G15/08
- IPC: G03G15/08
Abstract:
A developing device includes a toner carrying member and an electric-field forming unit. The electric-field forming unit forms electric fields having different characteristics at a first area of the surface of the toner carrying member located within a developing area and a second area of the surface of the toner carrying member located out of the developing area such that a hopping height of toner at the first area is higher than that at the second area.
Public/Granted literature
- US20090257786A1 DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS Public/Granted day:2009-10-15
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