| 摘要 |
The order in which printing work products, such as finished books, book blocks and other similar objects, are transported is rearranged intermediate serially arranged entry and discharge conveyors. In a destacking mode of operation, stacks of products are positioned at an intermediate destacking station and the product which is uppermost in the stack is separated from the stack and delivered onto the receiving end of the discharge conveyor, the receiving end of the discharge conveyor being caused to move vertically in steps so as to remain in position to receive individual products as the stack height is reduced. In an alternative operational mode, the level of the discharge conveyor is fixed and the discharge end of the entry conveyor is vertically moved in stepwise fashion with a support platform of the destacking station such that, when control over the last product of a stack is transferred to the discharge conveyor, the transfer of a new stack into the destacking station can occur as the support platform is returned to its starting position.
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