Container closing means

Claim 1

A CONTAINER CONSTRUCTION, COMPRISING: A CYLINDRICAL MEMBER DEFINING THE SIDE WALL OF A CONTAINER, SAID CYLINDRICAL MEMBER BEING FORMED OF FIBROUS MATERIAL; A ONE-PIECE RIM HAVING THE GENERAL APPEARANCE OF A FIGURE EIGHT IN CROSS-SECTION AND DISPOSED TRANSVERSELY ACROSS ONE END OF SAID CYLINDRICAL MEMBER, SAID RIM HAVING AN INTERMEDIATE WALL PORTION OF SUBSTANTIALLY THE SAME EXTERNAL DIAMETER AS THE INTERNAL DIAMETER OF SAID CYLINDRICAL MEMBER AND WHICH IS SNUGLY TELESCOPED WITHIN SAID ONE END OF SAID CYLINDRICAL MEMBER, SAID RIM HAVING AN OUTER WALL PORTION WHICH MERGES SMOOTHLY WITH AND EXTENDS RADIALLY OUTWARDLY FROM SAID INTERMEDIATE WALL PORTION AND THEN DOWNWARDLY AND BACK TOWARD SAID MEMBER, SAID OUTER WALL PORTION BEING CURVED THROUGH AN ARC OF AT LEAST ABOUT 360* AND BEING RIGIDLY INTERLOCKED WITH AN END PORTION OF SAID CYLINDRICAL MEMBER AND FORMING AN OUTER RING PROJECTING RADIALLY OUTWARDLY FROM THE OUTER SURFACE OF SAID CYLINDRICAL MEMBER, SAID RIM HAVING AN INNER WALL PORTION EXTENDING RADIALLY INWARDLY AND THEN UPWARDLY AND BACK TOWARD SAID CYLINDRICAL MEMBER, SAID INNER WALL PORTION BEING CURVED THROUGH AN ARC OF AT LEAST ABOUT 360* AND FORMING AN INNER RING WHICH PROJECTS RADIALLY INWARDLY FROM THE INNER SURFACE OF SAID CYLINDRICAL MEMBER, SAID INNER AND OUTER RINGS BEING DISPOSED IN AT LEAST PARTIALLY OVERLAPPING RELATION IN AN AXIAL DIRECTION ALONG SAID CYLINDRICAL MEMBER SO THAT THEY PROVIDE REINFORCEMENT FOR EACH OTHER IN A RADIAL DIRECTION, SAID RIM ALSO HAVING AN UPWARDLY OPENING GROOVE BETWEEN SAID RINGS.