| 摘要 |
PURPOSE:To maintain a gap between a tracking roll and a photosensitive drum with high accuracy by forming a recessed part on the surface of the tracking roll and opening the recessed part on the side of tracking roll. CONSTITUTION:The titled developing device is provided with the photosensitive drum 2 and the tracking roll 1 concentrically formed with a magnetic roll 5 opposed to the photosensitive drum 2. A projected part 12 and a recessed part 12 are formed on the surface of tracking roll 1 so as to be opened on the side of the tracking roll 1. In said constitution, the gap between the tracking roll and the photosensitive drum can be maintained only by applying simple working to the surface of the tracking roll, i.e. forming the recessed part. |
