| 摘要 |
<p>A trailer (T) and a dock (D) are provided with substantially identical slat conveyors (10, 12). Each conveyor (10. 12) has alternating conveyor slats (36, 36') and lifting/holding slats (38, 38'). The trailer (T) is backed up to the dock (D). Upper portions of the lifting/holding slats (38, 38') are coupled together at their ends. The confronting ends of the conveying slats (36, 36') are also coupled together. A mechanism carried by the dock (D) raises and lowers the upper portions of the two sets of lifting/holding slats (38, 38') a drive mechanism carried by the dock (D) where it reciprocates both sets of conveying slats (36, 36').
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