| 摘要 |
PURPOSE:To prevent end parts of a beltlike photosensitive body from being rubbed against control members which control the breadthwise position of the photosensitive body by providing the control parts at both ends of a roller around which the beltlike photosensitive body is wound. CONSTITUTION:The position control members 32 provided rotatably to both ends of the shaft 31 of the driving roller 1 each have a flange 33 larger than the external diameter of the driving roller 1. When the beltlike photosensitive body 4 almost shift in either breadthwise direction, the deviation is inhibited with their flanges 33 and the control members 32 rotate following up the run of the photosensitive body 4. Therefore, the end parts of the photosensitive body are never rubbed against the control members 32 and the life of the photosensitive body 4 is prolonged; and no frictional heat is generated, so an excellent copy image is formed. |
