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2. 发明授权

US06782226B2 Developing device 失效
标题翻译：开发设备
公开(公告)号：US06782226B2
公开(公告)日：2004-08-24
申请号：US10367843
申请日：2003-02-19
申请人： Junji Machida , Hidetoshi Miyamoto , Tetsumaru Fujita , Masahiko Matsuura , Yoshiko Yaoi , Makoto Shimazoe , Shuichi Nakagawa
发明人： Junji Machida , Hidetoshi Miyamoto , Tetsumaru Fujita , Masahiko Matsuura , Yoshiko Yaoi , Makoto Shimazoe , Shuichi Nakagawa
IPC分类号： G03G1508
CPC分类号： G03G15/0808 , G03G2215/0619
摘要： A developing device includes a toner bearing member holding a toner on its surface for conveyance of the toner to a development region where the toner bearing member opposes an image bearing member via a predetermined gap therebetween; a regulating member pressed against the surface of the toner bearing member for regulation of the amount of toner conveyed to the development region; and a developing bias source for applying an alternating electric field between the toner bearing member and the image bearing member. The developing device features the use of the toner bearing member including a conductive substrate formed with an elastic layer, an intermediate layer and a surface layer on the surface thereof, respective volume resistances &rgr;1, &rgr;2 and &rgr;3 of which layers satisfy a condition &rgr;2≦&rgr;1≦&rgr;3, the toner bearing member having an arithmetic average surface roughness in the range of 0.8 to 2.5 &mgr;m, and the use of the toner having a volume-average particle size of 3 to 8 &mgr;m.
摘要翻译：显影装置包括在其表面上保持调色剂的调色剂承载构件，用于将调色剂输送到显影区域，在该显影区域，调色剂承载构件经由图像承载构件经由其间的预定间隙对置; 调节构件压靠在调色剂承载构件的表面上，用于调节传送到显影区域的调色剂的量; 以及用于在调色剂承载构件和图像承载构件之间施加交变电场的显影偏压源。显影装置的特征在于使用调色剂承载部件，该调色剂承载部件包括形成有表面的弹性层，中间层和表面层的导电性基板，其各层满足条件rho2 <= 1的各自的体积电阻rho1，rho2和rho3， RHO1＆LE; RHO3，具有0.8〜2.5μm的算术平均表面粗糙度的调色剂承载构件，以及使用体积平均粒径为3〜8μm的调色剂。

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