| 摘要 |
A plurality of sets of aligned rollers are guided for movement along a shingling conveyor. While one set of such rollers is in an operative position snubbing sheets as they are delivered to the shingling conveyor, another set of such rollers is inoperative and can be moved to a ready position for the next production order. The rollers are movable downwardly to a snubbing position and upwardly to an inoperative position.
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