B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/7.5
B65B 31/02 (2006.01) B65B 11/52 (2006.01)
Patent
CA 1241908
MULTISTAGE DRAPING IN VACUUM SKIN PACKAGING ABSTRACT OF THE DISCLOSURE An improvement is provided in a method for vacuum skin pack- aging. Vacuum skin packaging includes placing an article between packaging members in a vacuum chamber having a concave closure that peripherally engages at least one of the members, then vacuumizing the region between the closure and the engaged member to draw the engaged member against the closure, then vacuumizing the region between the packaging members, then releasing the first vacuumized condition to collapse the engaged member into conforming contact with the article, and then peripherally sealing together the packaging members about the article. The improvement provides for releasing the first vacuumized condition stage-wise across the closure, proceeding toward the periphery of the engaged packaging member, to move excess packaging material to the periphery of the final packaged configuration thereby diminishing any tendency toward wrinkling. Associated apparatus is also provided.
434561
Cryovac Inc.
Smart & Biggar
LandOfFree
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