Model 3901 Horizontal Carton and Corrugated Case Sealer has been redesigned to accommodate a larger package size range and now features motorized “D-depth” adjustment. Heavy products in cartons and corrugated cases measuring from 3”L x 1”W x 3”D to 12”L x 6”W x 36”D can now be hot melt adhesive sealed at speeds to 60/minute. “Tool-less” three dimension package size changes can be accomplished is 20 minutes or less by non-technical operators.