Seal for self-welding bag

Details Seal for self-welding bag Seal for self-welding bag

B - Operations, Transporting

65

D

220/1

B65D 33/22 (2006.01)

Patent

CA 1082142

SEAL FOR SELF-WELDING BAG Abstract of The Disclosure The invention relates to a self-welding bag or pouch of heat-shrinkable material having a novel seal configuration composed of a complete end or outer heat seal and at least one perforated inner heat seal adjacent and parallel to said outer seal so that air can be removed from the space between seals as the bag is evacuated and shrunk thereby providing an area seal between said inner and outer seals as the bag walls adhere to each other. This seal configuration overcomes the problem of seal delamination which occurs in prior art self-welding bag and pouch structures.

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