Drum-multiple seal gasket

Claim 1

IN COMBINATION, AN OPEN HEAD DRUM HAVING A HEAD CURL, A MULTIPLE-SEAL RING GASKET ON SAID DRUM MADE OF A RESIIENT MATERIAL COMPRISING AN ANNULUS HAVING AN ARCUATE CROSS SECTION DEFINING AN INTERIORLY DISPOSED CONCAVE CHANNEL RECEIVING THE HEAD CURL AND FITTING THEREON FOR EFFECTING A SEAL BETWEEN THE SURFACES OF SAID CHANNEL AND SAID CURL, SAID ANNULUS HAVING AN ANNULAR SKIRT OF THE SAME MATERIAL EXTENDING OUTWARDLY FROM SAID ANNULUS IN POSITION TO PERIPHERALLY ENGAGE THE OUTSIDE WALL SURFACE OF SAID DRUM A LIMITED AXIAL EXTENT AND EXTENDING AXIALLY AWAY FROM SAID CURL SNUGLY ENGAGING SAID OUTSIDE WALL SURFACE TO EFFECT A PERIPHERAL SEAL BETWEEN IT AND SAID DRUM ALONG AN ANNULAR AREA SUBSTANTIALLY IMMEDIATELY ADJACENT SAID CURL AND BETWEEN SAID CURL AND A BOTTOM END OF SAID DRUM, A COVER FOR COVERING SAID DRUM HAVING A LIP FOR COMPRESSING SAID ARCUATE ANNULUS AGAINST AT LEAST THE TOP SURFACES OF SAID CURL FOR EFFECTING A SEALED AREA DEFINED BETWEEN SAID ANNULUS AND SAID CURL, AND EFFECTING A SEAL BETWEEN SAID COVER AND SAID ANNULUS, AND A LOCKING RING HAVING AN UPPER LIP FOR PRESSING SAID COVER LIP TOWARD SAID CURL AND A LOWER LIP FOR COMPRESSING SAID ANNULUS ALONG AN ANNULAR AREA ON THE UNDERSIDE OF SAID CURL TO EFFECT ALON G AN ANNULAR AREA ON THE UNDERSIDE OF SAID CURL TO EFFECT ANOTHER FLUID-TIGHT SEALED ANNULAR AREA BETWEEN SAID RING GASKET, SAID DRUM AND SAID LOCKING RING,