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    • 59. 发明授权
    • Image forming apparatus which removes a surface potential of an
intermediate transfer member
    • 去除中间转印部件的表面电位的图像形成装置
    • US5983060A
    • 1999-11-09
    • US50907
    • 1998-03-31
    • Shin-Ichi NamekataHideo YuuSatoru UchidaMitsuru TakahashiKatsuya KawagoeHiroshi OnoToshiaki Motohashi
    • Shin-Ichi NamekataHideo YuuSatoru UchidaMitsuru TakahashiKatsuya KawagoeHiroshi OnoToshiaki Motohashi
    • G03G15/16
    • G03G15/161G03G15/162G03G2215/0177G03G2215/1623G03G2215/1661
    • An image forming apparatus which utilizes an intermediate transfer member. Plural toner images, for example of different colors, can be superimposed on the intermediate transfer member, and then can be transferred to a paper sheet. A discharging device is provided for discharging a charge applied to the intermediate transfer member. Further, a value of a voltage provided by this discharging device and/or a voltage provided for a transfer bias is proportional to an actual surface potential on the intermediate transfer member, which is proportional to the number of times toner images have been formed on the intermediate transfer member prior to transfer to the paper sheet. For example, if a full color toner image is formed on the intermediate transfer member, which may result from four operations of transferring individual toner images onto the intermediate transfer member, a voltage provided by the discharger and/or by a transfer bias device will be higher than that if only a monocolor image has been formed on the intermediate transfer member. Further, the image forming apparatus can be operable to form images on thicker paper, and in this instance a drive speed of devices in the image forming apparatus can be reduced, and a voltage applied to a pre-charger can also accordingly be reduced. The image forming apparatus can also include a cleaning device from the intermediate transfer belt, and the functions of both the intermediate transfer member discharging device and a cleaning device can be combined in one brush roller.
    • 一种利用中间转印部件的图像形成装置。 可以将例如不同颜色的多种调色剂图像叠加在中间转印部件上,然后可以转印到纸张上。 设置有用于对施加到中间转印部件的电荷进行放电的放电装置。 此外,由该放电装置提供的电压值和/或为转印偏压提供的电压的值与中间转印部件上的实际表面电位成比例,该实际表面电位与在上述形成的调色剂图像的次数成正比 在转印到纸张之前的中间转印部件。 例如,如果在中间转印部件上形成全色调色剂图像,这可能由将各个调色剂图像转印到中间转印部件上的四个操作产生,则由放电器和/或转印偏压装置提供的电压将为 高于在中间转印部件上仅形成单色图像的情况。 此外,图像形成装置可以操作以在较厚的纸上形成图像,并且在这种情况下,可以减少图像形成装置中的装置的驱动速度,并且还可以相应地减小施加到预充电器的电压。 图像形成装置还可以包括来自中间转印带的清洁装置,并且中间转印部件排出装置和清洁装置的功能可以组合在一个刷辊中。