| 摘要 |
PROBLEM TO BE SOLVED: To preheat and soften a zipper 2 without fail before it is collapsed, even when the zipper seal 2 is different in shape and size in a bag making machine which manufactures a zipper bag from a plastic sheet 1 and the zipper 2 by incorporating the zipper 2 to the plastic film 1. SOLUTION: A high temperature gas is blown to the plastic film 1 and the zipper 2 to preheat and soften the zipper 2 before the zipper 2 is collapsed at the side seal position of the plastic film 1. COPYRIGHT: (C)2004,JPO&NCIPI |
