| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily openable gusset bag which includes an adhesive seal portion easily tearable and cuttable with slight force of the finger tips from a tearing notch formed at each of edge thermal adhesive portions at respective edges of the gusset bag when contents stored in the gusset bag is taken out, and can be produced by using an existing bag forming machine or a bag-form-fill-packaging machine without complicated bag-forming steps. SOLUTION: Inward folding portions are arranged on both side ends of substrate sheets each made of a plastic as a main material, and superposed edges of the folding portions and the both the side edges of front and rear face sheets are stuck to each other in a longitudinal direction to form the edge thermal adhesive portions, followed by forming the tearable notches for opening the bag, at the edges of the edge thermal adhesive portions. According to the gusset bag, through holes or notches superposed on each other or peripheral areas of the same are bonded and sealed in each folding portion, at locations corresponding to the tearable notch or lower peripheral edges of the same. COPYRIGHT: (C)2005,JPO&NCIPI
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