发明名称 Image forming apparatus which a developing roll is capable of contacting with and spacing from
摘要 An image forming apparatus has an image bearing member, a charger for charging the image bearing member image forming means for selectively erasing charge on the image bearing member to thereby form an electrostatic image, and a developing device for developing the electrostatic image. The developing device includes a developing roll contacting with the image bearing member and is capable of having a developing bias applied thereto and contacting and spacing device for contacting and spacing the developing roll with respect to the image bearing member. The contacting and spacing device contacts the developing roll having the developing bias applied to the area thereof charged by the charger with the image bearing member at a start of image formation.
申请公布号 US6466755(B2) 申请公布日期 2002.10.15
申请号 US20010774585 申请日期 2001.02.01
申请人 发明人
分类号 G03G15/00;G03G15/06;G03G15/08;G03G15/16;G03G21/14;(IPC1-7):G03G15/08;G03G15/01 主分类号 G03G15/00
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