| 摘要 |
PURPOSE:To make the construction of the replenishing and recovery device of toner simple by constructing a part of the recovery and replenishing conveyance line of toner to form a common line. CONSTITUTION:The toner supplied to a photosensitive drum, etc. from a developing device 4 by screw drivers 12, 14, 15 which are kept driven at all times is recovered through a cleaning device 9. When the clutch 16 assumes a coupled state according to the concentration detection of the toner, a screw driver 13 is driven by a motor 17 so that the toner in a replenishing hopper 11 is replenished through the drivers 14, 15 common to the recovery conveyance line. |
