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    • 65. 发明授权
    • Overlaid image forming apparatus with coordinated transfer bias and
attraction bias voltage sources
    • 具有协调转移偏压和吸引偏压电压源的重叠成像设备
    • US5287163A
    • 1994-02-15
    • US968260
    • 1992-10-29
    • Toshiaki MiyashiroShinkichi TakahashiTatsuya Kobayashi
    • Toshiaki MiyashiroShinkichi TakahashiTatsuya Kobayashi
    • G03G15/01G03G15/16
    • G03G15/167G03G15/0131G03G2215/0174G03G2215/1619
    • A superposed image forming apparatus wherein toner images are superposedly transferred onto a transfer material includes an image bearing member; a device for forming a toner image on the image bearing member; a transfer material carrying member, disposed opposed to the image bearing member, for carrying a transfer material in synchronism with the toner image on the image bearing member; a transfer material supplying device for supplying the transfer material to the transfer material carrying member; a transfer bias voltage source for applying to the transfer material carrying member a bias voltage for image transfer from the image bearing member to the transfer material; an attraction member for urging the transfer material to the transfer material carrying member to hold the transfer material on the transfer material carrying member; an attraction bias voltage source for applying a bias voltage to the attraction member; the bias voltage applied to the attraction member is changed in association with on-and-off of the bias voltage application to the transfer material carrying member so as to maintain a constant surface potential of the transfer material carrying member.
    • 其中调色剂图像被重叠地转印到转印材料上的重叠图像形成装置包括图像承载部件; 用于在图像承载部件上形成调色剂图像的装置; 转印材料承载部件,与图像承载部件相对设置,用于与图像承载部件上的调色剂图像同步地承载转印材料; 用于将转印材料供给到转印材料承载部件的转印材料供给装置; 转印偏压电源,用于向转印材料承载部件施加用于从图像承载部件到转印材料的图像转印的偏置电压; 吸引构件,用于将转印材料推压到转印材料承载构件以将转印材料保持在转印材料承载构件上; 用于向吸引构件施加偏置电压的吸引偏压电压源; 施加到吸引部件的偏置电压与对转印材料承载部件的偏置电压的开/关相关地改变,以保持转印材料承载部件的表面电位恒定。