发明授权
- 专利标题： Development device and image forming apparatus incorporating same
- 专利标题（中）： 包含其的显影装置和图像形成装置
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申请号： US14019991申请日： 2013-09-06
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公开(公告)号： US08655237B2公开(公告)日： 2014-02-18
- 发明人: Yuji Suzuki , Akihiro Takayama , Kentaro Nodera , Hiroyuki Uenishi , Susumu Tateyama , Shinnosuke Koshizuka , Tatsuya Kubo , Koichi Yamazaki
- 申请人： Yuji Suzuki , Akihiro Takayama , Kentaro Nodera , Hiroyuki Uenishi , Susumu Tateyama , Shinnosuke Koshizuka , Tatsuya Kubo , Koichi Yamazaki
- 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： Harness, Dickey & Pierce, P.L.C.
- 优先权： JP2010-190373 20100827; JP2010-234104 20101019; JP2011-121747 20110531
- 主分类号： G03G15/09
- IPC分类号： G03G15/09
摘要：
A development device includes a developer bearer to carry the developer to a development range, a magnetic field generator disposed inside the developer bearer for generating magnetic force, a developer regulator for adjusting an amount of the developer, a developer supply compartment disposed adjacent to the developer bearer, separated by a side wall from a portion where the developer bearer is provided, a developer agitator provided in the supply compartment, and a blocker disposed above the side wall of the supply compartment across a supply gap through which the developer moves from the supply compartment. The magnetic field generator has an attraction magnetic pole and a regulation magnetic pole. The blocker prevents the developer blocked by the developer regulator from moving along a magnetic force line of the regulation magnetic force toward the circumferential surface of the developer bearer.