LUKKEINNRETNING OMFATTENDE LAASELEMENTER SAMT FREMGANGSMAATE FOR DENS FREMSTILLING.

摘要

A method for providing a wide-track integral thermoplastic closure for film or sheet stock. The closure includes ribs on either side of an element of the closure to provide the wide-track effect to assist one in ease of interlocking the closure elements. By varying the thickness of the closure element adjacent the ribs, the spacing of the ribs to provide the desired wide-track feel can be obtained.