| 摘要 |
PURPOSE:To reduce considerably the dirt due to a toner in a machine by wrapping outside peripheral surfaces of both end parts of a photosensitive drum with a duct having air intake ports and connecting this duct to a bleeder. CONSTITUTION:Air intake parts A and B consisting of air intake ports 18, 19, and 20 are provided to wrap outside peripheral surfaces of both end parts of a photosensitive drum 1, and they are connected to the bleeder through ducts 21 and 22 constituting an air intake duct 14. The air intake port 18 is formed with the gap between the outside peripheral end face of the photosensitive drum 1 and a bending edge 16 of the air intake end, and the air intake port 19 is formed with duct side faces 15 and 17. Since this air intake duct 14 is provided, air currents going toward air intake parts A and B are formed in the machine, the toner is put on these air currents and is discharged even if the toner is scattered. Thus, the dirt due to the toner is kept slight even in case of 50,000 copies. |
