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AssigneeCryovac, Inc.
InventorsLarry W. Depoorter, Craig G. Wallington, Edgar A. Chow, Robert A. Odabashian, Dilip K. Boal
Estimating the term…
A patch bag comprises a heat-shrinkable bag comprising tubular bag film, and a heat-shrinkable patch comprising a patch film, the patch being adhered to the bag, the patch bag having a seal which is through both patches as well as through both lay-flat sides of the bag. A process for making the bag includes sealing an inside surface of the film tubing to itself, the sealing being carried out by applying heat to each of the patch outside surfaces, the heat being applied by a first means for heating and a second means for heating, the first and second means for heating being in alignment with one another, with the patches and bag tubing therebetween during sealing.
An end-seal patch bag comprising a heat-shrinkable bag comprising a seamless tubular bag film, and a heat-shrinkable patch comprising a patch film, the patch being adhered to the bag, the patch extending across an entire width of a first lay-flat side of the tubular bag film, the patch bag having a seal across the bottom thereof, the seal being continuous across the entire width of the lay-flat bag film, the seal being through the patch as well as through both lay-flat sides of the bag, the seal being the only seal across the bag, the bag having a top which is not covered by the patch.
A patch bag comprising a heat-shrinkable bag comprising a tubular bag film, and a heat-shrinkable patch comprising a patch film, the patch being adhered to the bag, the patch bag having a seal which is through both the patch as well as through both lay-flat sides of the bag, the sealed bag having a burst strength of at least 26 inches of water in a Linear Ramp Hot Burst Grease Test.
Dependencies are inferred from the claim text.