发明名称 Image forming apparatus having a charging member with plural charging modes
摘要 An image forming apparatus includes a photosensitive body, a charging member for charging the photosensitive body, voltage applicator for applying a voltage including an AC component to the charging member, exposing device for image exposing on the photosensitive body charged by the charging member to form an electrostatic image, and developer for developing the electrostatic image, wherein the image forming apparatus can select from a first mode having low tone reproductivity and a second mode having tone reproductivity higher than that of the first mode, and wherein, when the second mode is selected, the voltage applicator applies a voltage having a frequency of the AC component higher than that when the first mode is selected.
申请公布号 US5991557(A) 申请公布日期 1999.11.23
申请号 US19980027319 申请日期 1998.02.20
申请人 CANON KABUSHIKI KAISHA 发明人 KUNISHI, TSUYOSHI;YAMAMOTO, TAKEO;TAKURA, KEIZO
分类号 G03G15/00;G03G15/02;(IPC1-7):G03G15/02;G03G21/00 主分类号 G03G15/00
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