PACKAGING BRIEFS: Pro-Mach Inc., Cincinnati, said its Wexxar Packaging division acquired IPak Machinery Ltd., a Vancouver, B.C., manufacturer of corrugated tray forming machines. Wexxar manufactures end-of-line case erecting and case sealing equipment. . . . Plastic films supplier Pliant Corp., Schaumburg, Ill., named four regional direct sales representatives for its U.S. Stretch and Shrink Films business. Named to regional vice president positions were Craig Miller (Northeast) Steve Johnston (Southeast) Michelle Wilson (Midwest) and Brian Gooding (West). Pliant said it concluded its former sales representation contract with Phenix Marketing Group, Winston-Salem, N.C.