Abstract: Sheet stack loader and sheet stack unloader arrangements provide load-while-run or unload-while-run capabilities. In a stack loader, a pusher element laterally pushes a stack or receiver into a sheet feed receiver. In a stack unloader, the pusher element pushes a finished stack from a stacking receiver to a removal receiver. By employing smooth paper support surfaces in the receivers, with close side-by-side positioning and an unobstructed path of movement, stacks of sheets of paper can be moved laterally by the pusher mechanism, which engages a side surface of the stack to be moved. Compact drive systems utilizing toggle drives and lead screws are utilized to minimize space requirements. Continuous run capabilities can be provided by auxiliary supply or stacking trays which are operative during the stack transfer sequence.

Abstract: Sorting apparatus in which tray assemblies in a vertical array are opened to facilitate feeding in sheets carried on a transport past the tray assemblies. The tray assemblies are hinged at one end to pivot when engaged by gear mechanism carried on a reciprocating apparatus. A deflector operatively associated with reciprocating apparatus deflects the sheets from the transport as each tray assembly is pivoted open in succession.