| 摘要 |
PURPOSE:To allow the execution of a jam treatment and the exchange of a process cartridge with a simple operation and to improve the ease of maintenance by providing jam detecting means and a control means which outputs a movement signal to a process cartridge moving means and a release signal to an upper cover releasing means in accordance with jam signals. CONSTITUTION:The signals for the presence or absence of a transfer material from the jam detecting sensors S1 to S4 are judged to be whether jam or not. A jam detecting section emits the jam signal to announce the generation and position of the jam to a control section when the signals are judged to be the jam. The control section, then, emits the movement signal to the process cartridge moving means and the upper cover release signal to the upper cover releasing means, respectively. The process cartridge moving means moves the process cartridge 15 from a 1st position to a 2nd position and the upper cover releasing means releases the upper cover. The exchange of the process cartridge or the jam treatment is executed by the simple operation in this way and the ease of maintenance is improved. |
