| 摘要 |
PURPOSE:To preclude toner fusion and filming on an image carrier by rotating a rotary body for transfer at different peripheral speeds when a transfer material is interposed between the image carrier and rotary body for transfer and not. CONSTITUTION:The peripheral speed of a transfer roll 5 as the rotary body for transfer is made different according to whether or not the transfer material 11 is interposed between a photo-sensitive body 1 as the image carrier and the transfer roll 5. Namely, a driving means 90 drives the transfer roll 5 to nearly the same peripheral speed as the peripheral speed of the photo-sensitive body 1 right before the transfer material 11 enters the contact part between the photosensitive body 1 and transfer roll 5. Further, the transfer roll 5 is rotated at the lower peripheral speed right after the transfer material 11 passes a transfer position. Consequently, the transfer material 1 is held strongly between the photosensitive body 1 and transfer roller while the transfer is carried out, but when the transfer is not performed, the transfer roll 5 slides on the photosensitive body 1 to preclude the toner fusion and filming by the sliding effect. |
