| 摘要 |
PROBLEM TO BE SOLVED: To reduce a time and labor which causes a cost increase in attaching a closing string in an opening of a large-sized bag formed of a vinyl resin or polyethylene. SOLUTION: A bag prepared by folding a wide tubular film formed of polyethylene or the like in the longitudinal direction one upon another by a multiple of four and welding one side to form a bottom is utilized. By only one operation which forms a round hole at one central position of one side (opening part side) of the bag made flat by piling up by press-cutting and inserts a string in the hole, when the bag is opened, the string becomes repeatedly in and out of the holes at definite intervals on the outer periphery of the bag, and the opening/closing of the opening of the bag with the string becomes free. COPYRIGHT: (C)2009,JPO&INPIT
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