公开(公告)号：US20090245882A1

公开(公告)日：2009-10-01

申请号：US12412892

申请日：2009-03-27

申请人： Takamasa OZEKI ,  Katsumi Masuda ,  Yoahio Hattori ,  Hiroyuki Uenishi ,  Yuji Suzuki ,  Kyohta Koetsuka ,  Masayuki Ohsawa ,  Yoshlyuki Takano ,  Takeroh Kurenuma

发明人： Takamasa OZEKI ,  Katsumi Masuda ,  Yoahio Hattori ,  Hiroyuki Uenishi ,  Yuji Suzuki ,  Kyohta Koetsuka ,  Masayuki Ohsawa ,  Yoshlyuki Takano ,  Takeroh Kurenuma

IPC分类号： G03G15/08

CPC分类号： G03G15/0812 ,  G03G15/0921 ,  G03G2215/0609

摘要： A developing unit includable in a process cartridge and in an image forming apparatus includes a developer bearing member including a magnetic field generator and a nonmagnetic hollow member, a developer container, an agitation/conveyance member, a developer regulating member to regulate the thickness of a layer of the two-component developer. The magnetic field generator has first and second magnetic poles to generate respective magnetic forces for removing the developer from the developer bearing member after the developer passes the development region. The second magnetic pole generates a magnetic force to attract the developer to form a magnetic brush on the developer bearing member. The developer regulating member includes a magnetic member outwardly disposed on an exterior perimeter surface of the developer bearing member upstream from the developer regulating member, and one planar surface of the magnetic member faces the second magnetic pole across an effective development region.

摘要翻译： 可包括在处理盒和图像形成装置中的显影单元包括显影剂承载部件，该显影剂承载部件包括磁场发生器和非磁性中空部件，显影剂容器，搅拌/传送部件，显影剂调节部件， 双组分显影剂层。 磁场发生器具有第一和第二磁极，以在显影剂通过显影区域之后产生用于从显影剂承载部件移除显影剂的相应磁力。 第二磁极产生磁力以吸引显影剂以在显影剂承载部件上形成磁刷。 显影剂调节构件包括在显影剂调节构件的上游向外设置在显影剂承载构件的外周表面上的磁性构件，磁性构件的一个平坦表面横跨有效显影区域面对第二磁极。