| 摘要 |
PURPOSE:To copy pictures in a short time by setting the length of scanning of an original scanning means to the shortest length in accordance with the side of a copy form, that of an original and the copy magnification. CONSTITUTION:The first - the third mirrors 1-3 constitute an optical unit and this optical unit scans an original platen 7 to scan the original. The copy form is stopped temporarily in the position of a paper start clutch PSC and is carried at a prescribed timing. The copy form is carried at the timing when the center of the image on a photosensitive drum 6 coincides with the center of the copy form. This timing is determined on the basis of the length l1 from the exposure position P4 of the photosensitive drum 6 to a transfer position P5, the length l2 from the position P6 of the paper start clutch PSC to the transfer position P5, the carrying speed of the copy form and the time from the start of the first mirror 1 to scanning of an original front end position P2. |
