Greif Bros. Corporation

Greif Brothers Corporation

Robert A Dubois

George F Smith

William H Gushard

Rex E Wagers

Elmer J Desher

Richard A Caron

A two-part drum includes a blow molded self supporting plastic liner with circumferential reinforcing grooves, and a shell. The shell and the liner have matching cross-sections defined by curved sidewalls and curved sections cooperating to form a nominally rectangular or square cross-section.

Drum with self-supporting liner

The present invention pertains to a container for shipping and storing a substance at a constant temperature. The container is made up of an inner liner with outlets, an insulating shell enveloping the liner and a fiber drum which houses the shell and the liner. A slip-on removal cover is used to close the drum.

Thermal container

An all-plastic drum construction permits a variety of sizes and capacity of drum by utilizing an extruded tube for the drum side walls of selected diameter and length proportional to the drum capacity desired. An injection molded bottom closure is welded to the bottom end of the tube by a thermoplastic bonding material having dispersed iron particles which are excited when exposed to induction heating thereby facilitating the melting of the thermoplastic. This welding material is disposed within a cavity defined by the bottom closure and bottom end of the tube and when subjected to induction heating and pressure fills the cavity to effectuate the bond between surfaces of the bottom closure and bottom end of the tube. A tight head drum is formed by securing by a similar welding technique a top closure to the upper end of the tube. In forming an open head drum, a thermoplastic chime is initially welded in similar fashion to the upper end of the tube. Thereafter, a top cover is releasably secured to the chime by a locking rim assembly.

Variable capacity all-plastic drum

An all plastic tubular drum is blow molded into the selected configuration from an extruded parison. The parison is provided with at least two spaced circumferentially extending thickened sections. These thickened sections are captured in a compression mold cavity during the blow molding cycle. Thereafter the captured thickened sections are compression molded into outwardly extending projections, undercuts, reinforcing gussets, or the like.

Method of blow molding an all plastic drum and compression molding a

A closure is provided for a container opening. The opening is defined by a neck extending outwardly from the top of the container. The closure includes a liner cap disposed both interiorly and exteriorly of the neck and defines a central passage. A plug extends across the top of the cap to close off the passage from the exterior. The plug is provided with at least one longitudinal hole. The lower end of the plug has attached thereto a membrane extending across the passage. This membrane does not permit liquids within the container to pass therethrough, but possesses the property of being capable of venting gasses therethrough. A dust cap may extend across the top of the closure during shipment and storage.

Vented closure

A protective gasket for the chime of a container. The gasket includes an annular flexible strip adapted to conform to surfaces of the chime. Surfaces on the strip cooperate with the container surfaces to hold the strip in position on the chime. Projecting ribs on the strip are located to engage with a cover applied to the container to provide a seal between the container and the lid.

Chime protective gasket

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.

Plastic drum

An all plastic drum is provided comprising an elongated hollow body member having a circular top end, a circular bottom end, a plurality of flat sides extending between said top and bottom ends, and surfaces blending said flat sides and said top and bottom ends. A bottom end closure extends across the drum bottom end and a top closure extends across the drum top end. The top closure includes at least one recess extending diametrically across the drum. The recess defines a channel which passes beneath a bridge-like structure formed integral with the top closure and spanning the channel.

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Marion, OH, United States of America

Robert A Dubois