American Can Company

American National Can Company

Raymond E Mietz

Harlen E Wilkinson

William Herman Hartman

Donald Henry Ruge

John R Peschke

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.

Method for propellant filling and sealing of a container

Propellant filling and sealing valve

A method of extruding bark and of forming a solid article, solid synthetic fuel or fireplace log comprising from about 60 to 95 percent by weight bark, which comprises physically blending pieces of combustible thermoplastic of an extrudable size with pieces of bark also of an extrudable size and having less than 7 percent preferably less than 2 percent moisture, to form a bark thermoplastic mixture of from about 60 to 95 percent by weight bark and about 2.5 to 40 percent by weight thermoplastic, feeding the mixture to an extruder, heating the bark thermoplastic mixture in the extruder, controlling the heat of the extruder so that its temperature is insufficient to char the bark pieces yet sufficient to melt the thermoplastic and disperse it between the bark pieces so that it acts as a binder therefor and adheres sufficiently to the interior barrel wall surface of the extruder to allow the mixture to be moved therethrough by the extruder screw, extruding the mixture in the form of a composite extrudate, and cooling the composite extrudate to solidify it into the solid synthetic fuel. Preferably, the extruder screw tip is cooled and the heat of the extruder is controlled to range from about 200.degree. to 400.degree. F. with certain temperatures maintained in the respective extruder barrel zones.

Method of extruding bark and of forming a solid synthetic fuel

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Barrington, IL, United States of America

Raymond E Mietz