Filter for rapid extraction of the aromatic substances of a product by a liquid under pressure, and an apparatus equipped with a filter of this type
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United States of America Patent
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-
Jul 5, 1994
Grant Date -
N/A
app pub date -
May 18, 1992
filing date -
May 22, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In an apparatus such as an electric coffee-maker, a filter (5) is placed at the bottom of a vessel (3) containing the product to be treated such as ground coffee. Resilient tongues (18) cut in the filter are disposed at uniform intervals about the center so as to form normally-closed orifices (17). When a predetermined pressure of liquid such as hot water is attained within the vessel, the orifices are freed to a sufficient extent to permit filtration of the liquid which has been in contact with the product.
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