| 摘要 |
<p>PURPOSE:To simplify a bag-making process and enable the process to be adapted to change the bag size by a method wherein a plastic film is folded so that its side parts of the film are overlapped in a continously staggered manner in the longitudinal direction, followed by spraying an adhesive, adhering a header and fusion- cutting to a predetermined size. CONSTITUTION:The synthetic resin film 31 continuously let off from a roll 30 is folded so that its side parts are overlapped in a continuously staggered manner in the longitudinal direction, with the outer edge part 21a and the inner edge part 21b spaced from each other by a predetermined idstance 23. Then, a hot melt adhesive is sprayed at a predetermined width to form adhesion part 24a, 24b, a releasing tape 25 is adhered onto the adhesion part 24b, and a plastic film 22 for header of a sufficient width is adhered through the adhesion part 24a, followed by fusion-cutting to predetermined length.</p> |
