EXECS ON THE MOVE: Plastic tray supplierAssociated Packaging Technologies , Chadds Ford, Pa., announced three hirings. They includeRichard Schwarz, named director of R&D; Jeffery Lucashappointed national sales manager, Food Service and Distribution; andRon Skotleski, named as a marketing analyst. . . . Multisorb Technologies, a Buffalo, N.Y., supplier of oxygen absorption media in packaging, hiredJeff Brownas Food & Beverage market business development leader. . . .Norwood Marking Systems / Allen Coding Systems, Downers Grove, Ill., said it hiredRandy Robertsas regional account manager, to serve several Southern states from Florida to Texas.