Package making – Methods – Conforming by stretching or shrinking of cover over contents
Reexamination Certificate
2005-03-01
2005-03-01
Gerrity, Stephen F. (Department: 3721)
Package making
Methods
Conforming by stretching or shrinking of cover over contents
C053S450000, C053S550000, C053S556000
Reexamination Certificate
active
06860086
ABSTRACT:
A method and packaging apparatus for packaging products starting from a continuous packaging web which moves uninterruptedly and wherein the web is formed into a package tube and, by the application of cross seals, is divided in separate packaged products. Prior to its folding, the film web is then stretched for obtaining, after application of the cross seals, a shrinkback effect. Due to this shrinkback effect, a tight-fitting package is obtained. The invention particularly relates to the manner in which the stretching of the film web is controlled, so that a good reproducible shrinking effect is obtained without the film web being subjected to undesired loads.
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Rosloot Wilhelmus Johannes
Tuyn Roberto
Birch & Stewart Kolasch & Birch, LLP
Buhrs-Zaandam B.V.
Gerrity Stephen F.
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