| 摘要 |
PURPOSE:To control the moving range of an original platen with a simple constitution and to easily and surely operate a blank shutter, as well by providing members to be detected attachably and detachably with respect to the original platen and plurally positioning them. CONSTITUTION:By fitting a second cam 5 to positions 5', 5'' corresponding to an original size or a transfer paper size, a micro-switch 3 is operated by the second cam 5 during movement for scanning the original platen 2, which can be returned to a home position by reversing on its way. This enables to speed up copying. Besides, since the second cam 5 also serves as the changeover scanning of the blank shutter 7, the blank shutter can be surely changed over even when the original platen 2. Thus, the moving range of the scanning of the original platen 2 is controlled with the simple construction, original scanning time is shortened, and the blank shutter can be surely changed over. |
