| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a packing body with a shape-retaining tape, of which an opening can easily be opened and which can easily be formed in a bag shape. <P>SOLUTION: A belt-shaped shape-retaining tape 20 is used, which has a thin part 22 thinner than a thick part 21 and formed continuously in one edge to extend in a longitudinal direction of the belt-shaped thick part 21. The shape-retaining tape 20 also has a guide thick part 23 thicker than the thin part 22 and formed in one edge to extend in the longitudinal direction. A lacked part 24 is formed by removing a part of the thick part 21 corresponding to a space between inner edges 12A of side seal parts 12 of a packing body 1 by punching. A pair of the shape-retaining tapes provided to the lacked parts 24 are heat-sealed with a base material film 11 in a state where the guide thick parts 23 are located a top seal part 14 side to form the packing body 1 in the bag shape. When the packing body 1 is opened at a location of the thin parts 22 to open the bag opening, ends of the thick parts 21 are separated by a restoring force of the opposing thick parts 21, and then, the bag is opened so that the inner edges 12A of the side seal parts 12 are wide open. <P>COPYRIGHT: (C)2012,JPO&INPIT |
