Package making – With cover-adjunct application or formation – Adjunct comprising provision to allow access to contents,...
Reexamination Certificate
2005-05-24
2005-05-24
Gerrity, Stephen F. (Department: 3721)
Package making
With cover-adjunct application or formation
Adjunct comprising provision to allow access to contents,...
C053S139200, C053S552000, C493S213000, C493S927000
Reexamination Certificate
active
06895725
ABSTRACT:
An automated reclosable packaging manufacturing equipment for applying zipper tape to bag making film, especially as part of a form-fill-seal process, and a method of joining a zipper flange of a zipper assembly to bag making film without “seal-through” of the zipper flanges. The method comprises the steps of: (a) pressing a web of bag making film and first and second zipper flanges of a zipper assembly together along the length of the latter, with the first zipper flange sandwiched between and in contact with the web of bag making film and the second zipper flange; and (b) during step (a), causing heat to be conducted through the web of bag making film into the first zipper flange. The amount of heat conducted through the web of bag making film must be sufficient to seal the web of bag making film to the first zipper flange without sealing the first zipper flange to the second zipper flange.
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Gerrity Stephen F.
Illinois Tool Works Inc.
Ostrager Chong & Flaherty & Broitman P.C.
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