Method for propellant filling and sealing of a container

Package making – Methods – Filling preformed receptacle and closing

Patent

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Details

53471, 53473, B65B 3100

Patent

active

047503149

ABSTRACT:
A non-venting propellant filling and sealing valve is adapted to be seated in a propellant filling hole in a bottom wall of a container and permits pressurization of a container through the hole and thereafter seals the container. The propellant filling and sealing valve includes an umbrella sealing portion, a stem portion and shoulder portions in a collar around the stem portion. The umbrella sealing portion is employed to selectively engage, separate from, and then make a generally annular seal with the interior surface of the bottom wall of the container. The stem portion is used to position the umbrella sealing portion around the filling hole and has axially extending grooves therein for conducting pressurizing fluid to the interior of the container. The shoulder portions in the collar bear against the outer surface of the bottom wall to cause the umbrella sealing portion to engage the interior surface of the bottom wall and the grooves extending axially through the collar and along the stem portion allow fluid access along the stem portion for the pressurizing fluid to enter the container. The method of pressurizing and sealing a pressurized container utilizes the filling and sealing valve described above.

REFERENCES:
patent: 2225395 (1940-12-01), Young
patent: 2301724 (1942-11-01), Vischer, Jr.
patent: 2571893 (1951-10-01), Kendall
patent: 2769457 (1956-11-01), Wittenberg
patent: 3082904 (1963-03-01), Newcomb et al.
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Article entitled "The Free-Piston Aerosol" from Aug. 1961 issue of Modern Packaging, by Hoffman, Jr. and Marchak.

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