Patent ID: 6931820
Filing Date: 2005-08-23
Classification: B31B

Abstract:
1. A method for attaching discrete lengths of zipper segments having interlocked profiles at spaced intervals across a web of bag making film, one of said profiles being atop the other, said method comprising: moving said web along a feed path; moving a zipper segment onto a top surface of said web extending at least partially across said web, by a driven belt transverse to the web moving direction; heating said web from below a bottom surface by capturing said web and zipper segment against said belt of said web so as to seal substantially an further comprising the; wherein said zipper segment is moved by a driven endless belt and comprising the further steps of feeding a zipper to a cutter, at said cutter removing a zipper segment from said zipper and downstream of said cutter feeding said segment into a nip between said endless belt and said web top surface.