| 摘要 |
A sliding member (18) slides in the transverse direction according to the eccentric rotation of a semicircular cam (17) and has a bent member (18b) of which the lower part is adapted to be inclined outwardly. When secondly feeding backward a disk (5) which has been fed backward first by the rotations of driver roller (24) and driven roller (26) in the unloading step, the sliding member (18) can rapidly get apart from the driver roller (24) and the driven roller (26).
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