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    • 2. 发明申请
    • ARCHING ZIPPER AND METHOD OF MANUFACTURE
    • 制作拉链和制造方法
    • WO2010129113A1
    • 2010-11-11
    • PCT/US2010/029120
    • 2010-03-30
    • ILLINOIS TOOL WORKS INC.GRECO, CharlesPLOURDE, EricKOENIGKRAMER, Rusty
    • GRECO, CharlesPLOURDE, EricKOENIGKRAMER, Rusty
    • B31B1/90
    • B65D33/2541B65D33/2591
    • Zippers are provided for reclosable packages or bags. By selectively co-extruding a first portion of the zipper with a shrinkable or expandable material, and simultaneously co-extruding a second portion of the zipper with a dimensionally stable thermoplastic or similar material, followed by a step of activating the shrinkage or expansion of the shrinkable material, several different shapes of zipper can be achieved. For instance, by co-extruding the shrinkable matenal to a lower portion of the zipper or co-extruding the expandable material to an upper portion of the zipper, an upwardly arching or convex shape can be achieved Similarly, by co-extruding the shrinkable material to an upper portion of the zipper or co-extruding the expandable material to a lower portion of the zipper, a downwardly arching or concave shape can be achieved.
    • 拉链提供可重新封闭的包装或袋子。 通过用可收缩或可膨胀材料选择性共挤出拉链的第一部分,并且同时以尺寸稳定的热塑性或类似材料共挤出拉链的第二部分,随后激活拉链的收缩或膨胀的步骤 可收缩材料,可以实现几种不同形状的拉链。 例如,通过将可收缩的毛面共挤出到拉链的下部或将可膨胀材料共挤出到拉链的上部,可以实现向上拱形或凸起的形状。类似地,通过共挤出可收缩材料 到拉链的上部或将可膨胀材料共挤出到拉链的下部,可以实现向下拱形或凹形的形状。