发明申请
- 专利标题: DEVELOPMENT DEVICE
- 专利标题(中): 开发设备
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申请号: US12468955申请日: 2009-05-20
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公开(公告)号: US20090290901A1公开(公告)日: 2009-11-26
- 发明人: Yasuyuki Ishii , Hideki Kosugi , Tomoko Takahashi , Yoshinori Nakagawa , Masaaki Yamada , Ichiro Kadota
- 申请人: Yasuyuki Ishii , Hideki Kosugi , Tomoko Takahashi , Yoshinori Nakagawa , Masaaki Yamada , Ichiro Kadota
- 优先权: JP2008-133426 20080521
- 主分类号: G03G15/08
- IPC分类号: G03G15/08
摘要:
A development device includes an open-ended housing, a rotatable roller, an array of multiple primary electrodes, a voltage source, a sealing member, and a secondary electrode. The housing accommodates toner for application to the photoconductive surface through an end opening thereof. The roller has an outer circumferential surface to deliver the toner from within the housing to a development zone. The array of multiple primary electrodes are aligned with each other on the roller surface. The voltage source applies a periodic pulse voltage to at least a subset of the primary electrodes to generate an oscillating primary electric field. The sealing member seals clearance between the roller surface and an edge of the end opening downstream from the development zone. The secondary electrode generates a secondary electric field to force the toner from the sealing member toward the roller surface to prevent premature removal of the toner.
公开/授权文献
- US08005409B2 Development device 公开/授权日:2011-08-23