Abstract: An assembly is provided for processing container ends received from at least two sources by loading the container ends into trays and stacking the trays. The assembly has a transport device capable of engaging sticks of container ends in a pick-up area and providing the sticks to a plurality of corresponding loading areas such that sticks from different sources are placed in different loading areas. Sticks are provided to the pick-up area by supply subassemblies which receive continuous arrays of container ends from the sources, separate the arrays into sticks, and provide the sticks to the pick-up area. The tray loading subassembly is further capable of engaging and transporting an empty tray from a stack of empty trays to the loading areas such that a stack of trays may be formed. Once the desired stack of trays is formed, a discharge subassembly transports the stack from the loading area to a discharge area for subsequent removal and transport to a desired location.