发明名称 Electrophotographic type image forming device and developing roller for use in the device
摘要 An electrophotographic type image forming device having a developing roller and a photosensitive drum. A nip portion is provided therebetween for supplying developing agents from the developing roller to the photosensitive drum. The developing roller and the photosensitive drum are rotated in the same rotational direction, i.e, a peripheral moving direction of the developing roller is opposite to peripheral moving direction of the photosensitive drum at the nip portion, so that toners provide vivid mobility at or adjacent the nip portion so as to cancel Van der Waals attraction force, and so that the toners can be attracted to the photosensitive drum only by applied electrical field. Developing is performed immediately upstream of the nip portion in rotational direction of the developing roller, and residual toners are collected by the developing roller immediately downstream of the nip portion for collecting and reusing the residual toners. Spherical tones as well as pulverized toners are used as the developing agent.
申请公布号 US5867755(A) 申请公布日期 1999.02.02
申请号 US19960759225 申请日期 1996.12.05
申请人 发明人
分类号 G03G15/08;G03G21/00;(IPC1-7):G03G15/08;G03G15/30 主分类号 G03G15/08
代理机构 代理人
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