Method for evacuating air from flexible packages
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United States of America Patent
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Mar 9, 2010
Issued Date -
N/A
app pub date -
Nov 24, 2004
filing date -
Nov 24, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of manufacture comprising the following steps: (a) making a vent hole in a package; (b) loading product into a receptacle of the package via an opening; (c) closing the opening; (d) placing an air-permeable layer of material over the vent hole; (e) squeezing the receptacle after steps (a) through (d) have been performed to force air out the vent hole; and (f) after step (e) has been performed, sealing the package so that air cannot enter the receptacle via the vent hole. In accordance with some embodiments, the vent hole is formed in the receptacle and sealed by means of an air-impermeable patch or by joining two walls of the receptacle together. In accordance with other embodiments, the vent hole is formed in a zipper tape attached to the receptacle and various means can be used to seal the vent hole after air removal.
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