| 摘要 |
<p>An apparatus for conveying a sheetlike original to be copied through the exposure section of a copying machine and back again when multiple copies are desired includes an original return means having at least two sets original sheet gripping and conveying elements which have been mounted in a common supporting element which can be displaced cyclically to a number of positions, whereby, in each position of the supporting element and with the return means activated, one set occupies a position located in the path of movement of an original leaving the exposure section, and another set occupies a second position located in the path of movement joining the entry to the exposure section. The apparatus further includes switching elements for switching the gripping and conveying elements of each set on and off, whereby the gripping elements are switched off and the conveying elements are switched on as soon as a set arrives into the second position, and the gripping elements are switched on and the conveying elements are switched off when a set is in the first position and after an original has been taken up by the gripping element in this set by at least its leading edge, and means for displacing the supporting element after the trailing edge of an original has passed the entry of the exposure section. Each set of gripping and conveying elements may comprise a pair of rollers which can be driven so that the leading edge of the original can be gripped with the risk of damage minimized while the gripping element allows a wrinkled or folded edge of the original to pass without difficulty.</p> |
