| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the recess of a body from wrinkling and make it easy to attach a suction opening for sucking out contents, by stepwise pressing for folding foldable ends that are both ends of the body of a semi-package and by providing oblique seals in at least one of the foldable ends. SOLUTION: A semi-package 11, having foldable ends 14 and 15 at both ends of a body 13 and provided on the periphery of the middle of the body 13 with a recess 20 in advance so that the body 13 does not bulge when the ends are pressed, is formed, and oblique seals 21 and 22 are formed in the foldable ends 14 and 15, respectively. Then, while the body 13 is pressed into a shape, the foldable ends 14 and 15 are each pressed in order one at a time to form an end face and a pair of flaps. Each pair of flaps are folded and joined onto the corresponding end face to form a package of a specific shape. Because the recess 20 of the body 13 is not pressed from both sides at the same time, a wrinkle does not occur. Also because the oblique seals are provided, the flaps are shortened and it makes it easy to attach a suction opening.</p> |
