发明名称 Manufacture of easily openable foil bag
摘要 In a foil bag composed of a foil piece and a tearing strip means, the bag having a flattened head portion, a longitudinal seam extending across the head portion, and a transverse seam transverse to, and crossing, the longitudinal seam in the head portion and sealing the bag, the tearing strip being spaced from the transverse seam in the direction toward the interior of the bag, and serving to aid opening by permitting a wall of the head portion which is not traversed by the longitudinal seam and which extends approximately across the width of the head portion to be torn open, and the tearing strip being provided with a gripping part projecting from the bag, the bag is provided with cuts defining a U-shaped passage opening, the gripping part extends through the opening from the interior of the bag to the exterior of the bag, and the bag is further provided with a seam parallel to the transverse seam and at the opposite side of the opening from the transverse seam, and a sealing seam intersecting the transverse seam and at least in part covering the transverse seam and the seam parallel to the transverse seam to form therewith a gastight seal around the passage opening.
申请公布号 US4364478(A) 申请公布日期 1982.12.21
申请号 US19810241066 申请日期 1981.03.06
申请人 SIG - SCHWEIZERISCHE INDUSTRIE-GESELLSCHAFT 发明人 TUENS, HEINZ-JOSEPH
分类号 B31B1/90;B65D17/48;B65D33/36;B65D75/68;(IPC1-7):B65D3/26 主分类号 B31B1/90
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