Method and apparatus for controlling the size and shape of a shrink film package

摘要

A shrink package method and apparatus is provided for controlling the volume and shape of a shrink film bag (24) or bubble producing a shrink wrapped package free of wrinkles and "ears". The apparatus comprises a hot air shrink wrap tunnel (18) having a conveyor (14) for moving a package through the tunnel. Within the tunnel an assembly (20) of a plurality of spaced apart wheels (34) are mounted within the tunnel a predetermined distance from each other and each of the parallel shafts (38) comprises a plurality of wheels (34) positioned a variable distance from each other. The portion of the wheels which touches the film comprises a material with low thermal conductivity. <IMAGE>