Abstract: A container with closure, in which the container has an annular tapered ridge disposed below its upper edge, and the closure has an inverted U-shaped groove with side walls sized and shaped to sealingly contact the container body at 4 surfaces. The U-shaped groove is sized slightly smaller than the portion of the container body received therein and includes a wedging portion whereby the groove walls clamp the container body side wall and is driven into tight abutment with the side wall by the wedging forces. The result is a vapor lock closure which is tightly secured to the container.

Abstract: A container closure especially for large containers and having circumferentially spaced tool access regions in a rim flange for insertion of a removal tool. These access regions are located between a base of the flange and a locking bead. Between the access regions, sections of a discontinuous locking bead extend around the inside of the flange, the bead being discontinuous across the circumferential area occupied by the access regions to enable a removal tool to be inserted downwardly through the access regions and between bead sections. Rim stiffening protrusions project from the outer surface of the flange beneath the access regions and across the circumferential line of the locking bead to stiffen the flange to prevent it from splitting when a removal tool is inserted down through the access regions and between bead sections.

Abstract: In a container and closure assembly, there is a resilient seal between the two components and the resiliency of the seal determines the normal relative closed positions of the closure and container. When the assembly is included within a stack, there is movement of the closure in the closing direction further to compress the seal. To prevent over-compression of the seal, opposed movement limiting surfaces are provided upon the closure and container, these surfaces being slightly spaced normally, but closing together to take loads directly from closure to container and thus avoid overloading the seal, when the assembly is located in a stack.