发明授权
- 专利标题： Developing unit having effective developer transportability, and process cartridge and image forming apparatus using the same
- 专利标题（中）： 具有有效显影剂输送性的显影单元，以及使用其的处理盒和成像设备
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申请号： US11836298申请日： 2007-08-09
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公开(公告)号： US08135311B2公开(公告)日： 2012-03-13
- 发明人: Kiyonori Tsuda , Hiroya Hirose , Satoru Yoshida
- 申请人： Kiyonori Tsuda , Hiroya Hirose , Satoru Yoshida
- 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： JP2006-219995 20060811
- 主分类号： G03G15/08
- IPC分类号： G03G15/08 ; G03G15/00 ; G03G21/16
摘要：
A developing unit includes a developer carrying member, a supplying compartment, a recovery compartment, and an agitation compartment. The developer carrying member develops a latent image formed on an image carrier with a two-component developer. The supplying compartment has a developer supplying transporter to supply the two-component developer to the developer carrying member while transporting the two-component developer. The recovery compartment has a developer recovery transporter to transport the two-component developer recovered from the developer carrying member. The agitation compartment has a developer agitation transporter to agitatingly transports developer. The developer agitation transporter includes a first screw having a screw pitch to transport developer to an upstream end of the supplying compartment from a downstream end of the agitation compartment. The developer supplying transporter includes a second screw having a given screw pitch, which is greater than a screw pitch of the first screw.