Two-piece container seal and method of manufacture

Details Two-piece container seal and method of manufacture Two-piece container seal and method of manufacture

2010-01-14

2011-12-20

Sells, James (Department: 1745)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S267000, C156S269000, C156S290000, C156S308400

Reexamination Certificate

active

08080118

ABSTRACT:
The present invention provides an improved method of preparing a two-piece container seal. The method comprises contacting a first thermoplastic surface of a moving web of a first flexible sheet material with a second thermoplastic surface of a moving web of a second flexible sheet material, the webs of first and second flexible sheet material moving at substantially the same speed and in the same direction; ultrasonically forming at least one array of spaced, frangible ultrasonic welds between the first and second thermoplastic surfaces, thereby producing a flexible multilayer sheet material having an adhesive-free interface between the first and second thermoplastic surfaces thereof; and cutting a container seal from the multilayer sheet material.

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