Method for making a puncture resistant bag

Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container

Patent

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Details

493197, 493933, 383119, B31B 2316, B31B 2326, B65D 3008

Patent

active

047041013

ABSTRACT:
A seamless, puncture resistant bag is made by advancing a lay-flat seamless tube of thermoplastic film; forming an alternating series of fused-unfused segments along said lay-flat tube by internally fusing said lay-flat tube at regular intervals, the unfused segment length being approximately equal to the fused segment length; treating the external surface of the lay-flat tube to render said surface self adherent; periodically folding back the lay-flat tube towards its treated surface at the juncture between the leading fused-unfused segments of the lay-flat tube; pressing the folded portion of the lay-flat tube; and severing the folded portion from the tube.

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