发明申请
- 专利标题: DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS USING SAME
- 专利标题(中): 使用相同的开发设备和图像形成设备
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申请号: US11622282申请日: 2007-01-11
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公开(公告)号: US20070166079A1公开(公告)日: 2007-07-19
- 发明人: Tomoyuki Ichikawa , Junichi Matsumoto , Nobuo Iwata , Natsumi Katoh
- 申请人: Tomoyuki Ichikawa , Junichi Matsumoto , Nobuo Iwata , Natsumi Katoh
- 优先权: JP2006-019678 20060127; JP2006-275106 20061006; JP2006-006820 20060113; JP2006-118562 20060412
- 主分类号: G03G15/08
- IPC分类号: G03G15/08
摘要:
A developing apparatus using a two-component developer constituted by a magnetic carrier and a toner, and an image forming apparatus comprising the developing apparatus. A developing unit and a stirring unit are provided, and in order to suppress toner scattering that may occur after a development operation has been halted for a long time, and thereby suppress contamination of the apparatus interior, the developer in a developing machine is transferred to a stirrer serving as a developer storage unit on the exterior of the developing machine when the development operation ends. Further, to extend the life of the developer, a range in which an angle of a restricting member upstream side central angle α, which is a central angle of the surface of a developing roller serving as a developer carrier on the upstream side of a restricting member opposing position opposing a doctor blade serving as a developer amount restricting member in a surface motion direction of the developing roller, is not less than 0[°] and not more than 60[°] is set as a low magnetic flux density area γ in which the maximum value of a normal direction magnetic flux density on the surface of the developing roller is not more than 30 [mT].
公开/授权文献
- US07792472B2 Developing apparatus and image forming apparatus using same 公开/授权日:2010-09-07