| 摘要 |
PURPOSE:To separate only photosensitive paper from a printing cylinder by bringing a shifting roller into contact with the printing roller selectively. CONSTITUTION:An original 8 and photosensitive paper 11 are carried in hermetic contact with a printing cylinder 1 by a belt 4. As a rotary arm 13 rotates on a fulcrum 13a, a sliding roller 14 touches the leading edge of the photosensitive paper. At this time, the shifting roller is stopped by releasing the clutch of a driving system or driven at a slower speed than a printing cylinder surface, so the leading edge of the photosensitive paper shifts from the original. Then, when the rotations of the shifting roller are returned to the original rotations, the photosensitive paper is ejected out through the operation of a pick-off table 5. After prescribed number of sheets of photosensitive paper are printed, any photosensitive paper is supplied any more, so the shifting roller 14 comes into contact with the original to eject the original. |
