| 摘要 |
PROBLEM TO BE SOLVED: To provide a film-made gusset bag maintaining its self-standing property, and forming a large opening when it is unsealed. SOLUTION: The film-made gusset bag 10 is equipped with: a pair of barrel members 11, 12; a pair of side members 14, 14 which are inwardly bent in a V-shape; and a top plate 13 which is connected to an upper portion 11a of one barrel member 11 to form a rectangular top plate portion 13a. A peripheral edge of the top plate 13 is heat-sealed to a peripheral edge of the other barrel member 12 and upper peripheral edges of the pair of side members 14, 14. A portion corresponding to the top plate portion 13a of the top plate 13 is inwardly bent. Lower peripheral edges of the pair of barrel members 11, 12 are heat-sealed to each other, and further, heat-sealed to the pair of side members 14, 14, forming a bottom part 15 forming a rectangular self-standing flat part. COPYRIGHT: (C)2011,JPO&INPIT |
