Aptargroup, Inc.

Greg L Cole

Jason D Hatton

A slit valve () to selectively restrict the passage of a fluent substance between an interior environment () and an exterior environment () and a method for forming the valve (), the method including the steps of providing at least one layer of film material and permanently deforming the film material to define a valve () for selectively restricting the passage of a fluent substance between an interior environment () and an exterior environment ().

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Coleman, MI, United States of America

Greg L Cole