| 摘要 |
PURPOSE:To obtain a copying picture having a good quality by attaching a friction body to the lower face of an original table provided in direction opposition to an output pulley in the first stage of a forward motion from a home position, and setting a thickness of the friction body to a value for making it contact elastically to the output pulley by a prescribed pressure. CONSTITUTION:When an output drum 53 in rotated from a state that an original table 10 is stopped at a home position, and moved in the original exposure direction, a wire 51 is drawn and simultaneously a frictional force works between an output pulley 52 and a friction body 55. Accordingly, as for the original table 10, a driving force works in two parts, the original table 10 can be moved in a state that the generation of a torsion is prevented exactly, and also a sag of the wire 51 can be eliminated. In this way, the original exposure can be attained in a state that an influence of a torsion, blurring, etc. is not exerted, by a simple constitution.
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