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    • 7. 发明授权
    • Image forming apparatus with controlled transfer voltage
    • 具有受控转印电压的图像形成装置
    • US5151736A
    • 1992-09-29
    • US682404
    • 1991-04-08
    • Yukihiro OhzekiJunji ArayaTatsunori IshiyamaYasushi SatoKimio Nakahata
    • Yukihiro OhzekiJunji ArayaTatsunori IshiyamaYasushi SatoKimio Nakahata
    • G03G15/16
    • G03G15/1675
    • An image forming apparatus includes an image bearing member carrying an image corresponding to image information; an image transfer device for transferring the image on the image bearing member onto a transfer material at a transfer position, wherein the transfer device includes a charging member contactable to a back side of the transfer material and voltage application means for applying a voltage to the charging member, wherein the voltage applying device effects a constant voltage control to the charging member when an image region of the image bearing member is at the transfer position, and effects a constant current control to the charging member at least a part of the other duration, and wherein a voltage level of the constant voltage control is determined on the basis of a voltage across the transfer device during the constant current control; wherein voltage applied to the charging member by the voltage applying device or a current through the charging member by the voltage applying device is limited.
    • 图像形成装置包括承载与图像信息对应的图像的图像承载部件; 图像转印装置,用于将图像承载部件上的图像转印到转印位置处的转印材料上,其中转印装置包括可与转印材料的背面接触的充电部件和向充电施加电压的电压施加装置 其特征在于,当所述图像承载部件的图像区域处于转印位置时,所述电压施加装置对所述充电部件施加恒定的电压控制,并且对所述充电部件的至少一部分持续时间进行恒定电流控制, 并且其中所述恒定电压控制的电压电平基于所述恒定电流控制期间所述传输装置两端的电压来确定; 其中由电压施加装置施加到充电构件的电压或通过电压施加装置通过充电构件的电流受到限制。