Vacuum packaging with preshrinking

Details Vacuum packaging with preshrinking Vacuum packaging with preshrinking

B - Operations, Transporting

65

B

156/7

B65B 31/00 (2006.01) B65B 31/02 (2006.01) B65B 53/06 (2006.01)

Patent

CA 1235648

VACUUM PACKAGING WITH PRESHRINKING ABSTRACT OF THE DISCLOSURE A method for vacuum shrink packaging a product is provided that includes the steps of placing the product in a heat shrinkable thermo- plastic bag; then shrinking the bag in a heated gaseous medium, while partially constricting the mouth of the bag to cause ballooning of the bag, further provided that the constricting is selected such that shrink- age of the bag overcomes the ballooning to collapse the bag onto the product; and then placing the bag in a vacuum chamber followed by vacu- umizing and in-chamber sealing, further provided that the rate of vacu- umizing is limited to substantially prevent reballooning of the bag. Associated apparatus for carrying out the method is also provided.

441600

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