| 摘要 |
A closure system for use in repetitively opening and closing an openable portion of a pliable container includes at least one shape memory element which is bowed and adapted to be supported adjacent the openable portion on a side wall of the pliable container for rotation about a longitudinal axis defined by the element. The element includes an elongated, generally concave surface portion and an opposing, generally convex surface portion. Upon closing of the container, the closure element is forced to rotate which functions to place an opposing side wall of the container in tension. The closure system has application to various types of pliable containers, including two-sided, multi-ply and gusseted bags. Provisions are also made for releasably locking the closure system in a container sealing condition.
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