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    Image forming apparatus
    6.
    发明授权
    Image forming apparatus 失效
    图像形成装置

    公开(公告)号：US5253022A

    公开(公告)日：1993-10-12

    申请号：US524024

    申请日：1990-05-15

    申请人： Akihiko Takeuchi ,  Takayasu Yuminamochi ,  Hiroto Hasegawa ,  Koichi Tanigawa ,  Yasumasa Ohtsuka ,  Hiroki Kisu

    发明人： Akihiko Takeuchi ,  Takayasu Yuminamochi ,  Hiroto Hasegawa ,  Koichi Tanigawa ,  Yasumasa Ohtsuka ,  Hiroki Kisu

    IPC分类号： G03G15/16

    CPC分类号： G03G15/1675 ,  G03G2215/1652

    摘要： An image forming apparatus includes a movable image bearing member; an image forming device for forming a toner image on the image bearing member; an image transfer device for transferring the toner image onto a transfer material at a transfer position, the transfer device including a rotatable member contactable to such a side of the transfer material as is opposite from a side contactable to the image bearing member and an electric field forming device for forming an electric field between the image bearing member and the rotatable member; wherein the electric field forming device forms a first electric field effective to transfer the toner from the rotatable member to the image bearing member and a second electric field which is opposite in a direction from the first electric field during a period in which the transfer material is absent at the transfer position, wherein each of the first and second electric fields is formed at least for a period required for the entire surface of the rotatable member passes through the transfer position.

    摘要翻译： 图像形成装置包括可动图像承载部件; 图像形成装置，用于在图像承载部件上形成调色剂图像; 用于将调色剂图像转印到转印位置的转印材料上的图像转印装置，所述转印装置包括可转印部件，该可转动部件可与转印材料的这种侧面相接触，所述转动部件与图像承载部件可接触的一侧相反， 形成装置，用于在所述图像承载部件和所述可转动部件之间形成电场; 其中所述电场形成装置形成有效地将所述调色剂从所述可旋转构件传递到所述图像承载部件的第一电场和在所述转印材料为所述转印材料的期间内从所述第一电场的方向相反的第二电场 在转移位置不存在，其中第一和第二电场中的每一个至少形成至少可旋转构件的整个表面所需的时间段通过转移位置。