Bottles and jars – Closures – Combined or convertible
Patent
1988-04-06
1990-02-13
Cusick, Ernest G.
Bottles and jars
Closures
Combined or convertible
141 88, 53 98, B65D 5124
Patent
active
048998966
ABSTRACT:
A cap adapted for use in pressurizing the interior of a container for carbonated beverages, the container having an opening therein, the cap comprising a cap adapted for sealing engagement with the container for sealing closure of the opening, a boss projecting from the cap for connecting a pressurizing device to the cap, a passage in the boss for providing communication between the pressurizing device and the interior of the container when the cap is on the container, the pressurizing device being operable to introduce gas via the passage into the interior of the container to pressurize it, and a single check valve in the passage. The check valve is adapted for permitting flow of gas from the pressurizing device into the interior of the container via the passage, for blocking flow of gas out of the container via the passage when the pressure in the container is below a predetermined limit, and for permitting flow out of the container via the passage when the pressure reaches or exceeds the predetermined limit.
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