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    • 6. 发明授权
    • Image forming apparatus and drive control method of the same
    • 图像形成装置及其驱动控制方法相同
    • US07826755B2
    • 2010-11-02
    • US12334332
    • 2008-12-12
    • Hiroo NaoiKohichi TakenouchiMitsuru TokuyamaKiyofumi MorimotoKazuma HinoueTomoki Minamikawa
    • Hiroo NaoiKohichi TakenouchiMitsuru TokuyamaKiyofumi MorimotoKazuma HinoueTomoki Minamikawa
    • G03G15/00G03G15/01
    • G03G15/5008G03G15/0126G03G15/065
    • An image forming apparatus capable of performing monochrome printing and color printing in which all the developing units share a single development transformer is constructed such that at the time of monochrome printing the photoreceptor drums for colors are stopped rotating while all the developing units are constantly applied with a high voltage. Further, the cumulative operation time in which the black photoreceptor drum has been operated for monochrome printing is calculated so that the color-printing photoreceptor drums which are stopped during monochrome printing are rotationally driven by a predetermined angle when the cumulative operation time exceeds predetermined fixed time. Thus, the surface of each color-printing photoreceptor drum that is being worn is restored by making the fresh surface of the drum oppose the associated color developing unit, whereby it is possible to prevent occurrence of defects on the surface of each photoreceptor drum.
    • 一种能够进行单色打印和彩色打印的图像形成装置,其中所有显影单元共享单个显影变压器被构造成使得在单色打印时,用于颜色的感光鼓被停止旋转,同时所有显影单元始终被施加 高电压。 此外,计算黑色感光鼓已经用于单色打印的累积操作时间,使得当累积操作时间超过预定的固定时间时,在单色打印期间停止的彩色感光鼓被旋转地驱动预定角度 。 因此,通过使滚筒的新鲜表面与相关联的彩色显影单元相对地恢复正在磨损的每个彩色印刷感光鼓的表面,从而可以防止每个感光鼓的表面上出现缺陷。