发明授权
- 专利标题： Developing device, developer therefor, and image forming method and apparatus, and process cartridge using the developing device
- 专利标题（中）： 显影装置，显影装置，图像形成方法和装置以及使用显影装置的处理盒
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申请号： US12042730申请日： 2008-03-05
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公开(公告)号： US07970323B2公开(公告)日： 2011-06-28
- 发明人: Hiroaki Katoh , Masayuki Hagi , Yoshihiro Mikuriya , Hideaki Yasunaga , Yoshitaka Sekiguchi , Kazuoki Fuwa , Masahide Inoue
- 申请人： Hiroaki Katoh , Masayuki Hagi , Yoshihiro Mikuriya , Hideaki Yasunaga , Yoshitaka Sekiguchi , Kazuoki Fuwa , Masahide Inoue
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Cooper & Dunham LLP
- 优先权： JP2007-071534 20070319
- 主分类号： G03G15/08
- IPC分类号： G03G15/08
摘要：
A developing device including a developer bearing member configured to feed a developer to an image bearing member; a developer supplying member, which is contacted with the developer bearing member at a first nip while opposed thereto and which is configured to supply the developer to the developer bearing member; and a developer layer forming member, which is contacted with the developer bearing member at a second nip located on the downstream side from the first nip relative to the rotation direction of the developer bearing member to form the layer of the developer on the developer bearing member, wherein the developer is a nonmagnetic one component developer, and the distance between the front edge of the second nip and the rear edge of the first nip relative to the rotation direction of the image bearing member is greater than 0.8 mm and less than 2.0 mm.