| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent waste during manufacture. <P>SOLUTION: A method for manufacturing a bag made of synthetic resin films comprises: obtaining a both end-square bottom body 22 provided with square bottom parts 14 including, on both longitudinal-direction ends, a whole seal part 14a which extends over the entire width direction of a flat tubular film having folded parts 12 folded inward on both right and left sides and integrally thermally welds the whole including the folded part 12, and partial seal parts 14b which extend obliquely upward on both right and left sides from a longitudinal-direction middle part of the whole seal part 14a in the part having the folded part 12 and separately thermally weld upper two films and lower two films; then cutting the part except the longitudinal-direction square bottom part of the both-end square bottom body 22 along a cutting line which is the same as an outer line of an extension part to be a handle part, thereby obtaining two bags 11 (11a and 11b) made of synthetic resin films. <P>COPYRIGHT: (C)2012,JPO&INPIT |
