Container and method of making it

Claim 1

A CONTAINER COMPRISING A CYLINDRICAL WALL AND AN END WALL, SAID CYLINDRICAL WALL BEING A COMPOSITE SHELL WHICH INCLUDES PREFORMED OPEN-ENDED CYLINDRICAL OUTER AND INNER SHELLS OF DISSIMILAR METALS, SAID OUTER AND INNER SHELLS EACH HAVING ITS OWN INDEPENDENTLY WELDED LONGITUDINAL SEAM, SAID INNER SHELL BEING INSERTED IN SAID OUTER SHELL AND CLOSELY RECEIVED THEREIN, BOTH SAID INNER AND OUTER SHELLS BEING EXPANDED UNIFORMLY AFTER INSERTION OF THE INNER SHELL TO FORM SAID COMPOSITE SHELL AS AN OPENENDED TIGHT UNITIZED CYLINDER FREE OF VOIDS AND CREVICES, THE OUTSIDE DIAMETER OF SAID COMPOSITE SHELL AFTER EXPANSION BEING AT LEAST 1/4 INCH GREATER THAN THE ORIGINAL OUTSIDE DIAMETER OF SAID OUTER SHELL, SAID COMPOSITE SHELL HAVING OUTWARDLY BENT END EDGES AND INTERMEDIATE BEADS AROUND ITS CIRCUMFERENCE FORMED AFTER THE SHELLS ARE EXPANDED, SAID END WALL BEING FIXED TO ONE OF SAID BENT END EDGES AND BEING OF LAMINATED STOCK, THE LAYERS OF WHICH ARE SIMILAR IN COMPOSITION TO SAID INNER AND OUTER SHELLS RESPECTIVELY.