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    • 72. 发明授权
    • Image forming apparatus having contact charger
    • 具有接触式充电器的图像形成装置
    • US5689777A
    • 1997-11-18
    • US555779
    • 1995-11-09
    • Masashi YamamotoHitoshi SaitoKoji Uno
    • Masashi YamamotoHitoshi SaitoKoji Uno
    • G03G15/02G03G15/08G03G21/00G03G21/14
    • G03G15/0216
    • An image forming apparatus includes a charging rotary brush in contact with a photosensitive member, a laser beam irradiator to form an electrostatic latent image, a developing unit for developing the latent image into a visible image and collecting residual developer remaining on the surface of the photosensitive member after the visual image is transferred to a transfer material, and a power source unit for applying to the charging rotary brush an oscillating voltage fulfilling the requirement of: .DELTA.t 3.times.L/Vpc wherein .DELTA.t is the time taken for the oscillating voltage to vary between .+-.300 V above and below the central oscillating voltage value between the peaks of the voltage, L is the printing pitch, and Vpc is the speed of movement of the surface of the photosensitive member.
    • 图像形成装置包括与感光构件接触的充电旋转刷,形成静电潜像的激光束照射器,用于将潜像显影成可见图像并收集残留在感光体表面上的残留显影剂的显影单元 将视觉图像转印到转印材料上的成像体,以及向充电旋转刷施加满足以下要求的振荡电压的电源单元:DELTA t 3xL / Vpc其中DELTA t为 振荡电压在电压峰值之间的中心振荡电压值之上+/- 300V之间变化的时间为L,为印刷间距,Vpc为感光部件表面的移动速度。