| 摘要 |
Developing unit (20) includes a housing (21) having an agitating space (21a) and a supply space (21b), the agitating space and the supply space communicating with each other through two gates to circulate a developer, an agitating auger (23) rotatably mounted in the agitating space to transfer the developer, a supply auger (24) rotatably mounted in the supply space to transfer the developer, and a magnetic roller which receives the developer by the supply auger and adheres the developer to the photosensitive body. A rotation control unit (41,44,58) controls rotation of the agitating auger and the supply auger. When the developer is concentrated on any one of two gates, one of the augers, which is positioned on a downstream side of the gate on which the developer is concentrated, temporarily stops rotating by the rotation control unit, and the developer concentrated on the gate is transferred from the gate by the other one of the augers, which is positioned on an upstream side of the gate on which the developer is concentrated. |
