| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device which transmits highly accurate rotation. SOLUTION: The device has a timing belt 7, and an exposure timing pulley 5 set on the exposure drum 3 which is removable from and reinstallable to the device. The exposure drum 3 is rotated in combination with the timing belt 7 and the pulley 7. When the drum 3 is removed or reinstalled, the inside surface of timing belt 7 is away from the outer surface of the timing pulley 5. |
