发明授权
US07920812B2 Development device and image forming apparatus that uses this device
有权
使用该装置的显影装置和图像形成装置
- 专利标题: Development device and image forming apparatus that uses this device
- 专利标题(中): 使用该装置的显影装置和图像形成装置
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申请号: US12261302申请日: 2008-10-30
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公开(公告)号: US07920812B2公开(公告)日: 2011-04-05
- 发明人: Hideki Kosugi , Yasuyuki Ishii , Tomoko Takahashi , Masaaki Yamada , Ichiro Kadota , Yoshinori Nakagawa
- 申请人: Hideki Kosugi , Yasuyuki Ishii , Tomoko Takahashi , Masaaki Yamada , Ichiro Kadota , Yoshinori Nakagawa
- 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: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2007-285751 20071102
- 主分类号: G03G15/08
- IPC分类号: G03G15/08
摘要:
A development device provided with a first electrode layer and a second electrode layer, which are laminated so as to overlap one another in a normal direction with respect to the surface of the roller part of the toner bearing roller. A plurality of openings are provided in the second electrode layer, over the entire latent image bearable area of a photosensitive body in the orthogonal-to-movement direction. The toner on the surface of the roller part is caused to hop between a plurality of spots directly beneath the openings that respectively exist directly beneath the plurality of openings in the second electrode layer, and a plurality of spots between the openings that respectively exist between the plurality of openings in the second electrode layer, within the entire area of the first electrode layer which is uniformly formed in the roller circumferential direction.