发明授权
- 专利标题: Development device, process cartridge, and image forming apparatus
- 专利标题(中): 显影装置,处理盒和成像装置
-
申请号: US12700834申请日: 2010-02-05
-
公开(公告)号: US08571449B2公开(公告)日: 2013-10-29
- 发明人: Yasuo Miyoshi , Norio Kudo , Yoshihiro Fujiwara , Tsukuru Kai , Hiroshi Hosokawa , Hiroaki Okamoto
- 申请人: Yasuo Miyoshi , Norio Kudo , Yoshihiro Fujiwara , Tsukuru Kai , Hiroshi Hosokawa , Hiroaki Okamoto
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Limited
- 当前专利权人: Ricoh Company, Limited
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2009-025834 20090206; JP2009-298609 20091228
- 主分类号: G03G15/09
- IPC分类号: G03G15/09
摘要:
A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier.