Pallet stacker-destacker Plywood

Sheet of plywood enters chain drag conveyor and is squared when it is fully conveyed into the stacker. The chain drag conveyor--actually, a 2-strand chain transfer--is raised one step and a pneumatically actuated mechanism moves away from the existing stack of plywood, lowering it onto the last sheet. The transfer then raises to the highest level, its second stage and discharges the entire stack OR the transfers drops one stage, the clamps move in to hold the stack and the transfer falls to its lowest stage where another individual sheet of plywood may enter the stacker. Process repeats.