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    • 2. 发明申请
    • ARCHING ZIPPER AND METHOD OF MANUFACTURE
    • 制作拉链和制造方法
    • US20100278457A1
    • 2010-11-04
    • US12435158
    • 2009-05-04
    • Charles GrecoEric PlourdeRusty Koenigkramer
    • Charles GrecoEric PlourdeRusty Koenigkramer
    • B65D33/16
    • 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 material 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. Similarly, by co-extruding the shrinkable material to inner portions of the zipper or the expandable material to outer portions of the zipper, a self-opening characteristic may be added to the zipper. Additionally, zippers may be placed at inclined positions in a complementary head-to-head configuration in order to eliminate or reduce waste of packaging material during manufacture.
    • 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,通过将可收缩材料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,通过将​​可收缩材料共挤出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。 类似地,通过将​​可收缩材料共同挤出到拉链或可膨胀材料的内部到拉链的外部部分,可以将自开的特性加到拉链上。 此外,拉链可以以互补的头对头配置放置在倾斜位置,以便在制造期间消除或减少包装材料的浪费。