| 摘要 |
PURPOSE:To preclude the formation of fine unevenness of the photosensitive body belt, the deterioration of the photosensitive body belt, and a decrease in picture quality by driving a metallic roller at the same linear speed with the photosensitive body belt with the driving force from a driving roller. CONSTITUTION:A metallic counter roller 20 as a driven roller which has the same diameter with the driving roller 2 is arranged along the reverse surface (reverse surface of exposure part 7) of the photosensitive body belt 1 and a driving belt 21 is extended endlessly around the outer peripheral surface of the driving roller 2 and exposure counter roller 20 to rotate the photosensitive body belt 1 and exposure counter roller 20 (driving belt 21) at the same linear speed. Consequently, fine unevenness (waving) formed on a metallic base owing to metal fatigue due to the friction between the metallic exposure counter body 20, abutting on the metallic base layer side of the photosensitive body belt 1, and the metallic base layer and the deteriorating of the photosensitive body belt 1 and the decrease in picture quality due to the fine unevenness are precluded. |
