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    • 73. 发明授权
    • Image forming apparatus having image transfer with toner cleaning
function
    • 具有调色剂清洁功能的图像转印的图像形成装置
    • US5729267A
    • 1998-03-17
    • US235809
    • 1994-04-29
    • Akira ShimadaMasashi YamamotoHiroyuki Tadokoro
    • Akira ShimadaMasashi YamamotoHiroyuki Tadokoro
    • G03G15/01B41J2/385B41J2/525G03G15/16B41J2/41G01D15/06G03G15/14
    • G03G15/168B41J2/385B41J2/525G03G2215/1652
    • Image forming apparatus having a photosensitive drum 1, a charger 2 for uniformly charging the photosensitive drum 1, an exposing means 3 for forming an electro-static latent image on the photosensitive drum 1, an exposing unit 4 for forming a visual image by developing the electro-static latent image, a transfer roller for transferring the visual image to a printing medium 10, which comprises a transfer voltage supply circuit that supplies the transfer roller 5 one or more times with voltage in one polar direction and successively in the other polar direction during an interval after starting of operation of the image forming apparatus and before the time when the printing medium 10 is transported to the transfer roller 5. By controlling in such a way, an image forming apparatus is provided in which memory effect does not arise, the transfer roller 5 being prevented from having accumulated toner attached thereto, the toner attached to the transfer roller 5 being cleaned, and so the reverse side surface of the printing medium 10 is not stained.
    • 具有感光鼓1的图像形成装置,用于使感光鼓1均匀充电的充电器2,用于在感光鼓1上形成静电潜像的曝光装置3,用于通过显影形成视觉图像的曝光单元4 静电潜像,用于将视觉图像传送到打印介质10的转印辊,该转印辊包括转印电压供应电路,该转印电压供应电路向一个极性方向和另一个极性方向依次提供转印辊5的电压一次或多次 在图像形成装置的操作开始之后的间隔期间,以及在打印介质10被传送到转印辊5的时间之间。通过这样的控制,提供了不产生记忆效应的图像形成装置, 防止转印辊5附着有累积的调色剂,附着在转印辊5上的调色剂被清洁,因此, 打印介质10的正面侧表面没有污染。
    • 75. 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。