| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a bag made of a synthetic resin which can inexpensively mass-produce a bag made of a synthetic resin having a subordinate storage space at the side face.SOLUTION: One or two partition parts are connected to the outer surface part 22 having a cylindrical cross section and to the inside of the cylindrical outer surface part 22 to make a long-length cylindrical synthetic resin member in which relatively large one main space part 32 and relatively small one or two subordinate space parts 34 are formed at the inside of the outer surface part. The long-length cylindrical synthetic resin member is pressed to be a flat shape, from the flat-shaped synthetic resin member, piece members 38 of prescribed length are cut out, either cut part of the piece member 38 is welded, and the main space part 32 and the subordinate space part 34 are formed into a main storage space 60 and a subordinate storage space 62 in which one end is blocked. A part of the outer surface part 22 composing the main space part 14 is cut away from the opposite side of the welded position of the piece member to form the opening part of the main storage space 32, and a part of the outer surface part 22 composing each subordinate space part 34 is cut to form the opening part of each subordinate storage space 62. |
