Snap-on container closure and combinations

Claim 1

IN CONTAINER CONSTRUCTION, A METAL CONTAINER WALL FORMED WITH A RELATIVELY LARGE OPENING THERETHROUGH, AN UPWARDLY EXTENDING NECK SURROUNDING SAID OPENING, SAID NECK HAVING A FIRST PORTION OF A SINGLE THICKNESS EXTENDING UPWARDLY FROM SAID CONTAINER WALL AND A DOUBLED OVER SECOND PORTION FORMED AS AN EXTENSION OF SAID FIRST PORTION AND EXTENDING RADIALLY OUTWARDLY AND UPWARDLY FROM SAID FIRST PORTION IN FRUSTO CONICAL FORM, A CLOSURE ASSEMBLY SECURED IN ASSEMBLED RELATIONSHIP TO SAID NECK, SAID ASSEMBLY INCLUDING A FLEXIBLE, RESILIENT SNAP-ON CLOSURE HAVING A DISC-LIKE TOP, A SKIRT PORTION BORDERING SAID TOP EXTENDING DOWNWARDLY AND INWARDLY AT AN ANGLE THEREFROM, AN ANNULAR FLANGE EXTENDING RADIALLY OUTWARDLY FROM THE BASE OF SAID SKIRT PORTION IN OVERLYING ENGAGEMENT WITH THE UPPER SURFACE OF THE CONTAINER WALL PORTION IMMEDIATELY SURROUNDING SAID NECK, A GRIPPING EAR FORMING PART OF SAID FLANGE AND EXTENDING RADIALLY OUTWARDLY FROM THE FREE EDGE THEREOF, SAID CONTAINER NECK HAVING A MAXIMUM OUTSIDE DIAMETER GREATER THAN THE MINIMUM INSIDE DIAMETER OF SAID SKIRT SO THAT SAID SKIRT IS RADIALLY OUTWARDLY EXPANDED UPON BEING URGED OVER SAID NECK, AND A TAMPERPROOF METAL CAPSEAL CLOSELY OVERLYING SAID SNAP-ON CLOSURE HAVING A DISC-LIKE TOP, A DOWNWARDLY EXTENDING SKIRT THEREAROUND, A TEARING EAR FORMING PART OF SAID CAPSEAL SKIRT AND EXTENDING RADIALLY OUTWARDLY FROM THE FREE EDGE THEREOF, SAID CAPSEAL TEARING EAR CLOSELY OVERLYING AND EXTENDING RADIALLY OUTWARDLY BEYOND SAID SNAP-ON CLOSURE FLANGE, SAID SNAP-ON CLOSURE GRIPPING EAR AND SAID CAPSEAL TEARING EAR BEING SO ARRANGED AS TO ALLOW SAID TEARING EAR TO BE TORN UPWARDLY INDEPENDENTLY OF SAID GRIPPING EAR AND SAID CAPSEAL SKIRT BEING CRIMPED RADIALLY INWARDLY SO AS TO TIGHTLY COMPRESS SAID SNAP-ON CLOSURE SKIRT ABOUT SAID NECK.