VENTED SCREWCAP CLOSURE WITH DIFFUSIVE MEMBRANE LINER
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United States of America Patent
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Issued Date -
Sep 17, 2009
app pub date -
Mar 12, 2009
filing date -
Mar 12, 2008
priority date (Note) -
Abandoned
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Abstract
A liner for a wine bottle cap is constructed such that a gas, such as oxygen, that diffuses through the liner moves along a path within the liner whose length is greater than the thickness of the liner. In this manner, oxygen from the atmospheric air can diffuse through a relatively thin liner at a slow rate before reaching the bottled wine. The liner is comprised of alternating layers of material semi-permeable to oxygen and material impermeable to oxygen, the impermeable layers containing open areas through which oxygen can diffuse. As oxygen diffuses through the alternating layers, the path(s) along which the oxygen diffuses is determined by the locations of the open areas in the impermeable layers. The liner may be assembled with a screw cap closure that comprises ventilation holes connected by a raceway for distribution of atmospheric air to the liner.
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