| 摘要 |
An image forming apparatus has a reciprocally movable document support table for supporting a document to be copied and a conveyor belt movable in directions opposite to those of the movement of the document support table in synchronism therewith. The conveyor belt conveys an image transfer sheet onto which toner images will be transferred in superimposed relation from a photosensitive body. After the toner images have been transferred, they are fixed to the image transfer sheet by an image fixing device. After the toner image transfer, the conveyor belt can be driven at a speed equal to the speed of sheet transfer by the image fixing device. Driving power transmitted from the table driving system to the conveyor belt is shut off while the document support table is moving for a distance corresponding to a period of time from after the document support table starts moving and the photosensitive body starts being exposed to until the image starts being transferred from the photosensitive body onto the image transfer sheet, and thereafter the conveyor belt is driven in synchronism with the document support table. When successive images are transferred onto the image transfer sheet in superimposed relation such as to produce a colored copy, the conveyor belt is moved in synchronism with the document support table. When a single image is transferred onto the image transfer sheet, the conveyor belt is moved in synchronism with the photosensitive body.
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