| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag with a zipper wherein there is no gap being apt to be produced at the side portions of the zipper opening portion of the bag, and thereby the contents of the bag are prevented from leaking, and to provide a method of manufacturing the bag. SOLUTION: A bag 1A with a zipper 4, the side portions of which are securely adhered, is manufactured in steps of pushing ultrasonic horns against both side portions of the zipper opening portion, where the zipper 4 is attached, from the outer surfaces of the bag 1A, in order to crush at least the engaging portions of the zipper end portions into a flat form, and pushing heat plates to the areas 7 including the crushed portions from the outer surfaces of the bag 1A in order to heat-seal the areas 7. |
