Variable air access films
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United States of America Patent
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Sep 20, 2016
Issued Date -
N/A
app pub date -
Apr 30, 2014
filing date -
May 1, 2013
priority date (Note) -
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Abstract
A variable air access mechanism and method of varying air access comprising a first film with a predetermined amount of total air access openings to be formed by removal of laser cut chads; a portion of the chads only partially cut; and a second film adhered to the first film wherein removal of the second film in a first direction opens all of the air access openings or removal of the second film in an opposing direction leaves the partially cut chads attached to the first film such that only selected chads are removed.
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