Selective degassing valve for containers of aromatic or odorous products, such as coffee and the like
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United States of America Patent
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-
Oct 22, 2002
Grant Date -
Jun 6, 2002
app pub date -
May 22, 2001
filing date -
Dec 6, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A one-way degassing valve (4) for containers of aromatic products such as coffee and the like, comprising a valve body (5, 6), a valve element (12) and a filter (17), comprising a selective filter layer (21a), preferably consisting of activated charcoal, which allows the passage of low molecular weight gases, such as carbon dioxide, and retains high molecular weight gases that constitute the product's aroma, and an oxygen and CO.sub.2 adsorbing layer (21b), able to eliminate the residual oxygen present in the container and suitably reduce the amount of CO.sub.2.
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