| 摘要 |
A device for cyclically rearranging a pile of rectangular or square sheets, particularly a pile (182) of photographic prints, comprises a first (12) and a second (14) frame parts movable with respect to each other in parallel to the main plane of the pile, and elements which grab an individual sheet (188) from one side of the pile and bring it to the other side of the pile during a reciprocating motion of the frame parts. Said elements comprise: (a) a separator device (20, 68, 71) to separate a single sheet from the pile, (b) a feeding device (22) to feed the sheets to the separator device, (c) retainer devices (26, 28, 32, 80) to retain the single sheet in the first frame part and the remainder of the pile in the other frame part, and (d) a guiding device (79) to bring back the single sheet to the other side of the remainder of the pile. The device for retaining the single sheet comprises: (1) a roller (28, 300) arranged in the second frame part (14) on the individual sheet (188) to be retained, rolling at a circumferential speed equal to the relative speed between the two frame parts (12, 14) and (2) a bearing element on the sheet side-turned towards the roller which element is formed by a counter-roller (306) arranged in the second frame part or by a rolling track (134/136) in the first frame part. The roller and the counter-roller press the individual picture by a pressure arrangement. |
