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US 5,332,094 AGranted
Heat shrinkable handle bag article
AssigneeViskase Corporation
InventorsPhilip F. Cilia, Vytautas Kupcikevicius
Life of this patent
Estimating the term…
Abstract
A heat shrinkable bag having a slit cut through two plies of a skirt portion so that the skirt forms a handle upon heat shrinking. The slit is cold cut through both plies of the skirt for most of the slit length except the opposite ends of the slit are burnt through the skirt to weld the plies together at the slit ends.
Claims2
A heat shrinkable bag with an integral handle forming portion comprising:
- a) generally rectangular front and rear bag panels of a thermoplastic, heat shrinkable film superimposed and laying flat one against the other, said panels being generally symmetrical about a longitudinal midline;
- b) a transverse heat seal joining said panels, said heat seal defining the closed bottom of said bag;
- c) each of said superimposed panels extending from said heat seal to provide a skirt along said closed bottom which is two plies thick over its entire extent;
- d) said skirt having a slit which extends transverse said longitudinal midline, the opposite ends of said slit being arcuate and curved inwards towards said heat seal;
- e) said slit being cold cut through both of said plies for a major portion of the slit length such that said panels along said major portion are loose and unsealed one from another;
- f) said arcuate slit ends each being hot cut through both of said panels such that said panels along said arcuate ends are fused one to another;
- and
- g) said skirt upon the heat shrinking of the bag about a product sealed therein being biaxially shrinkable to form a bag carrying handle wherein said slit forms a hand opening for said carrying handle and a portion of said panels along said cold cut length shrinking and curling back over said plies to form a relatively smooth appearing handle edge.
5 more elements
Dependencies are inferred from the claim text.