发明授权
US06285848B1 Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additive
失效
电子照相设备，图像形成方法和用于利用含有外部添加剂的调色剂显影图像的处理盒
- 专利标题： Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additive
- 专利标题（中）： 电子照相设备，图像形成方法和用于利用含有外部添加剂的调色剂显影图像的处理盒
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申请号： US09092935申请日： 1998-06-08
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公开(公告)号： US06285848B1公开(公告)日： 2001-09-04
- 发明人: Shuichi Aita , Kenji Okado , Toshiyuki Ugai , Ryoichi Fujita , Fumihiro Arahira , Kiyoshi Mizoe , Yoshifumi Hano
- 申请人： Shuichi Aita , Kenji Okado , Toshiyuki Ugai , Ryoichi Fujita , Fumihiro Arahira , Kiyoshi Mizoe , Yoshifumi Hano
- 优先权： JP9-155629 19970613; JP9-156810 19970613
- 主分类号： G03G1502
- IPC分类号： G03G1502
摘要：
An electrophotographic apparatus includes an electrophotographic photosensitive member, and (i) a charger, (ii) an imagewise exposure device, (iii) a developing device and (iv) a transfer device, disposed in this order opposite to the photosensitive member. The charger includes a charging member including magnetic particles disposed in contact with the photosensitive member so as to charge the photosensitive member based on a voltage received thereby. The magnetic particles are surface-coated with a coupling agent having a linear alkyl group having a least 6 carbon atoms. The developing device also functions to recover residual toner remaining on the photosensitive member processing by the transfer device and the charger. Because of the coating with such a specific coupling agent, the charging magnetic particles can exhibit good triboelectric changeability for the transfer residual toner for a long period.