Patent ID: 7211036

Claim:
A method of manufacture comprising the following steps: (a) interlocking respective lengths of first and second flangeless zipper strips to each other; (b) advancing a first web in a machine direction; (c) joining a back of at least a major portion of said length of first flangeless zipper strip to a portion of said first web of packaging film along a zone that is oriented transverse to said machine direction; (d) laying a second web over said first web with said major portion of said length of first fiangeless zipper strip and a major portion said length of second flangeless zipper strip disposed between said first and second webs; (e) joining a back of at least said major portion of said length of second flangeless zipper strip to a portion of said second web; (f) joining said second web to said first web to form a pocket having a mouth that is closed to the extent said major portions of said lengths of first and second flangeless zipper strips are interlocked; (g) cutting said first and second webs along respective lines close to said lengths of first and second flangeless zipper strips respectively; and (h) placing a slider comprising first and second sidewalls on said major portions of said lengths of first and second flangeless zipper strips with said portions of said first and second webs respectively joined thereto, as a result of which said portion of said first web passes between said first sidewall of said slider and said length of first flangeless zipper strip and said portion of said second web passes between said second sidewall of said slider and said length of second flangeless zipper strip.