| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner replenishing device and an image forming device constituted, so that toner can be stably transferred by a suction means and the toner remaining in a toner container may be reduced. SOLUTION: The device is provided with a communication path communicating between the toner container 20 and a developing device 10 and a powder pump 40 arranged in an optional position on the communication path, and if the pressure in the toner container 20 is expressed as Pd and the pressure near the upstream side in the toner transferring direction of the powder pump 40 is expressed by Pt, at least one of the pressure of the toner container 20 and the suction pressure by the powder pump 40 is controlled, so that relation Pd>Pt is maintained. |
