Transverse direction zipper applicator and method

Details Transverse direction zipper applicator and method Transverse direction zipper applicator and method

2005-08-23

2005-08-23

Sipos, John (Department: 3721)

Package making

Methods

Forming a cover adjunct or application of a cover adjunct to...

C053S451000, C493S213000

Reexamination Certificate

active

06931820

ABSTRACT:
An apparatus for attaching discrete lengths of zipper at spaced intervals across a web of bag making film has an endless belt supported between a pair of pulleys for moving zipper segments into position on the web. The zipper segments are cut from a zipper supply and fed into a nip between the endless belt and the web top surface. After a zipper segment is deposited into position on the web, the endless belt is raised. A vertically movable sealing bar below the web is raised into position to heat the web to seal the zipper to the web after which the sealing bar is lowered. The web then advances and the process is repeated.

REFERENCES:
patent: 4878987 (1989-11-01), Ven Erden
patent: 5816018 (1998-10-01), Bois
patent: 6044621 (2000-04-01), Malin et al.
patent: 6116314 (2000-09-01), Johnson
patent: 6138436 (2000-10-01), Malin et al.
patent: 6568150 (2003-05-01), Forman
patent: 6588176 (2003-07-01), Buchman
patent: 1 086 899 (2001-03-01), None
patent: 99/59872 (1999-11-01), None

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