Leaktight screw cap with disk having a gas-barrier effect
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United States of America Patent
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-
Dec 9, 1997
Grant Date -
N/A
app pub date -
Feb 12, 1997
filing date -
May 21, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Leaktight screw cap composed of two cup-shaped shells rendered integral by fitting one into the other, the lowest shell being made from a flexible plastic having a female thread and a sealing device and the outer shell being made from a hard plastic. A disk made from a material having a gas-barrier effect is inserted between the bottoms of the outer shell of the inner shell. This screw cap is especially applicable to beverages and other products that are sensitive to gas exchanges with the outside.
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