Abstract: The invention relates to drum containers provided with one or more rolling hoops. The drum has a continuous vertical side wall provided with one or more reinforced portions. Each of the reinforced portions is provided with an outwardly convex rolling hoop located between a pair of inwardly concave annular grooves formed in the side wall of the drum. The vertical dimensions of the grooves are at least twice the size of the grooves' depth, while the vertical dimension of the rolling hoop is at least twice the horizontal projection by which the rolling hoop extends outwardly from the side wall.

Abstract: A drum outlet and closure apparatus for use with cylindrical steel drums provides an outlet fitting with a peripheral shoulder that is generally S-shaped to accept a cap seal (such as a commercially available metallic cap seal). The shoulder thus protects an inwardly spaced threaded section. In another embodiment, the drum outlet is formed of parent metal of the drum end, formed into an annular shoulder and then partially threaded. An upper unthreaded section is folded to define a closure sealing surface. The threaded section accepts a threaded closure fitting. An unthreaded lower interior section provides enhanced strength and protects the threading.

Abstract: A method for forming a threaded dispensing opening for a cylindrical drum container having a generally flat circular closed bottom, a generally flat circular closed top, and a cylindrical side wall comprising the steps of forming an aperture in the drum top and drawing the drum metal adjacent the aperture upwardly to define an upwardly extending annular shoulder. The shoulder is then compressed downwardly to thicken the shoulder and a female threaded portion is formed on the inside of the annular shoulder which is receptive of a threaded closure member.