| 摘要 |
PROBLEM TO BE SOLVED: To obtain the reliability in quality by stably securing sealability of side-notch seal parts interposing a zipper, in a pillow packaging bag with a zipper.SOLUTION: A point seal 10 is applied at a position corresponding to a side-notch seal 12 on base tapes 6 and 7 of a zipper 4, and the side-notch seal 12 is applied upon the point seal 10. By this arrangement, though the number of films at the part of the side-notch seal 12 becomes four compared with two that is the number of films at top seals 1a of a bag 1, when the side-notch seal part 12 is heat sealed with the two top seals 1a, uncertainty for the sealability at the part of the side-notch seal 12 is eliminated as the point seal part 10 is securing the sealability. |
