| 摘要 |
PURPOSE:To eliminate the influence of heat on a photosensitive body and to improve the carrying property of a transfer paper by providing a first opening/ closing member which opens/closes the entrance of a fixing device and a second opening/closing member which opens/closes an exhaust path formed between the photosensitive body and the fixing device. CONSTITUTION:When a transfer paper is not fed the entrance 24 of the fixing device 23 is closed by the first opening/closing member 31, so that heat in the fixing device 23 is prevented from dissipating out. At this time, the second opening/closing member 33 opens the exhaust path 29, so that the photosensitive body 12 is cooled by the flow of exhaust air by an exhaust fan; therefore, the deterioration of the photosensitive body which is caused by heat is prevented. When the sheet is fed, the first opening/closing member 31 and the second opening/closing member 33 are maintained in the opening position and the closing position, respectively, therefore the transfer paper is carried without being influenced by the flow of exhaust air and black line jitter which is caused by the occurrence of jamming or collision can be prevented. |
