American Can Company

American National Can Company

Harlen E Wilkinson

Neal E Langseder

Raymond E Mietz

Fred W Wren

Theodore Sopher

A buckle resistant end for containers which is formed with an inwardly bowed countersink wall, a countersink groove defined by two unequal radii and a central panel wall stretched taut by accentuated doming.

Buckle resistant can end

Method of forming a buckle resistant can end

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 closure for sanitary or food cans made from high temper plate to withstand the high pressure developed during processing without permanent distortion or buckling. An upwardly directed reinforcing annular bead is introduced concentric with a countersink groove which is disposed between the end flange and said annular bead. The ends are further contoured with a series of transitional steps or panels inward of said annular bead. These features enhance the strength of the closure without inducing substantial warpage.

Warp resistant closure for sanitary cans

Shown is an easy open closure for a container wherein there is a ring-pull tab held by an integral rivet to the central circular recessed panel of the closure. The tab however, rests on a raised portion of that panel which portion includes various areas of weakening and strengthening and a displaceable panel therein defined by a score line. The raised portion positions the tab to protect it against abuse loadings due to handling and shipping full containers having the closure. About the periphery of the central circular panel is a stepped wall portion except near the area of the score line for the displaceable panel where the wall is unstepped.

Growing community of inventors

Crystal Lake, IL, United States of America

Harlen E Wilkinson