Patent ID: 7229511
Filing Date: 2007-06-12
Classification: B31B,Y10T

Abstract:
1. A method of manufacture comprising the following steps: (a) inserting a multiplicity of sliders on a tape made up of a pair of at least partially interlocked profiled zipper strips having mutually opposing extension flanges, said sliders being distributed along a length of said tape, one slider per package-length section of said tape; (b) placing said tape with sliders inserted thereon so that a first portion of said tape and at least one slider thereon are disposed in a channel of a guideway, with the flanges of said first portion penetrating and protruding out of a longitudinal opening in the guideway; (c) advancing a second portion of said tape with sliders inserted thereon, said second portion extending from a point upstream of the guideway to a point downstream of the guideway, and including said first portion of said tape inside said channel; (d) joining the flanges of a package-length distal portion of said tape to film material; and (e) cutting said tape and said film material to sever said distal portion of said tape from the rest of said tape, wherein the channel has a cross-sectional shape that limits turning of a slider about any axis as that slider travels inside the channel during tape advancement, and has a length equal to at least one package length.