Plastic drum
AssigneeGreif Bros. Corporation
InventorsRobert A Dubois, Elmer J. Desher
Life of this patent
Estimating the term…
Abstract
An improved drum is provided comprising an elongated tubular body member formed of a plastic material. The drum further includes plastic top and bottom closures secured to opposite ends of the body member and including portions which extend respectively over the top and bottom ends of the body member. Metal chimes encircle the interfaces of both the top and bottom closures with the body member and secure the closures to the body member. Each chime is spirally wound inwardly about the interface through at least 360.degree. of arc. An accordion-like member extends between the body member and bottom to allow for greater flexibility. The top and bottom closures are designed to enable stacking of the drum on another drum of similar construction.
Claims8
An essentially all plastic drum comprising:
- an elongated tubular plastic body member;
- a plastic bottom closure secured to one end portion of said body member;
- a plastic top closure secured to the other end portion of said body member;
- at least one opening in one of said closures;
- said top closure including a radially outwardly extending peripheral ledge overlying the top edge of said body member;
- a top chime being rolled inwardly about the top end portion of said body member and said top closure, said top chime when unrolled including a main body portion and a radially inwardly and downwardly extending top portion overlying and contacting the outer surfaces of said top closure ledge and said top end portion of said body member and clamping said top closure ledge and said top end portion of said body member together;
- said top chime being spirally wound inwardly about said top closure and said top end portion of said body member through at least 360.degree. of arc and being completely out of contact with the interior of said drum;
- and,
- a bottom chime substantially identical in construction to said top chime securing said bottom closure to said body member.
Dependencies are inferred from the claim text.