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    • 12. 发明公开
    • Air-evacuable bag having double-layered valve film and method for manufacturing same
    • EntlüftbareTasche mit doppelschichtiger Ventilfolie und Verfahren zur Herstellung derselben
    • EP1375124A1
    • 2004-01-02
    • EP03013970.3
    • 2003-06-20
    • CTI INDUSTRIES CORPORATION
    • Anderson, Brent
    • B31B19/84B65D81/20
    • B65D81/2023B31B70/855
    • An air-evacuable bag has a one-way valve therein having two layers of valve film (38,42), neither of which is the sidewall layer (40,44) of the bag. A method for the manufacture of such air-evacuable bags incorporates a roll (20) supplying a first valve film layer (38), a roll (30) supplying a first sidewall layer (40), a roll (22) supplying a second valve film layer (42), and a roll (32) supplying a second sidewall layer (44). As the film (38) coming off the first valve film layer roll (20) passes the roll (30) supplying the first sidewall layer (40), both the first sidewall layer (40) and first valve film layer (38) move in close proximity to one another until the first valve film layer (38) is tacked to the first sidewall layer (40). The second valve film layer (42) and second sidewall layer (44) are processed simultaneously in a like manner, and all four layers (38,40,42,44) are joined at a sealing station.
    • 一个可抽气袋的单向阀内有两层阀膜(38,42),它们都不是袋子的侧壁层(40,44)。 用于制造这种可抽空袋的方法包括:供给第一阀膜层(38)的辊(20),供应第一侧壁层(40)的辊(30),供应第二阀膜 膜层(42)和提供第二侧壁层(44)的辊(32)。 当从第一阀膜层辊(20)脱落的膜(38)通过供给第一侧壁层(40)的辊(30)时,第一侧壁层(40)和第一阀膜层(38)都移动 彼此靠近,直到第一阀膜层(38)固定到第一侧壁层(40)。 以类似的方式同时处理第二阀膜层(42)和第二侧壁层(44),并且在密封站处连接所有四个层(38,40,42,44)。