Abstract: A scuffer/back stop mechanism for a duplex copy sheet tray is disclosed as having a carriage mechanism supporting two rotating members which serve as stops for the sheets entering the tray. The members are rotated to drive the sheets against side registration elements thereby effecting corner registration. The carriage is arranged to be driven to move the stop members in accordance with a parameter of the copy sheets sensed at the supply source for the sheets.

Abstract: A copy set collecting and storage arrangement is disclosed for a high speed copy reproduction system or duplicator machine having a finishing station. The arrangement includes an elevator for collecting finished copy sets in a stack and a conveyor for receiving one or more stacks from the elevator. Controls are devised for "limitless" finishing wherein the duplicator is placed in Standby, count holding condition when the full storage capacity has been reached and the programmed reproduction run has not been achieved. The controls will effect automatic start-up again when one or more of the stacks have been removed until once again the capacity has been reached and the reproduction run has not been completed.

Abstract: An apparatus for feeding individual substrates from the top of a stack upon demand includes an air nozzle that directs air along the bottom surface of an airfoil located above the front end of the stack. The combined effect of air pressure from the nozzle and the shape of the airfoil serves to lift the leading edge of the top sheet in the stack above a restraining member. A paddle wheel drives the separated sheet away from the stack.

Abstract: A copy set collecting and storage arrangement is disclosed for a high speed copy reproduction system or duplicator machine having a finishing station. The arrangement includes an elevator for collecting finished copy sets in a stack and a conveyor for receiving one or more stacks from the elevator. Controls are devised for "limitless" finishing wherein the duplicator is placed in Standby, count holding condition when the full storage capacity has been reached and the programmed reproduction run has not been achieved. The controls will effect automatic start-up again when one or more of the stacks have been removed until once again the capacity has been reached and the reproduction run has not been completed.

Abstract: A system for maintaining job integrity in a duplex copying apparatus is disclosed wherein the number of a first set of sheets coming into a duplex tray is counted and compared for coincidence with the number of the first set of sheets leaving the tray before separator fingers are retracted to allow the following sets of sheets to drop into position to be feed out of the tray.