SHRINK PACKAGING BAG, MANUFACTURE THEREOF, AND FILLING/ PACKAGING MACHINE FOR MANUFACTURING THE SHRINK PACKAGING BAG

摘要

PROBLEM TO BE SOLVED: To eliminate acute-angled protrusions which may be formed in the four corners of a shrink packaging bag and cause the damage of the packaging bag or inconvenience when the packaging bag is to be repackaged by an outer bag.;SOLUTION: A shrink packaging bag 100 has, at both ends thereof, a laterally sealed part 101 formed by heat-sealing a cylindrical film having heat-shrinkable properties. The film is heat-sealed in the state that its both side ends positioned in a width direction are folded inwardly and, by shrinking the film under heating, folded portions 102 are formed in four corners of the shrink packaging bag 100.;COPYRIGHT: (C)2001,JPO