Container and cap therefor

Claim 1

IN CLOSURE CONSTRUCTION FOR CONTAINERS, A CONTAINER NECK HAVING AN OPENING THERETHROUGH, SAID NECK COMPRISING A SINGLE LATERALLY EXTENDING PERIPHERAL LIP FORMATION, SAID LIP FORMATION LOCATED AT THE UPPERMOST END OF SAID NECK AND INCLUDING A TOP SURFACE, AN UPPER CONCAVE ANNULAR RECESS HAVING UPPER AND LOWER ENDS AND AN INTERMEDIATE SURFACE, THE UPPER AND LOWER ENDS OF SAID RECESS, AS VIEWED IN VERTICAL CROSS-SECTION, LYING IN A PLANE EXTENDING DOWNWARDLY AND OUTWARDLY AT AN ACUTE ANGLE FROM THE LONGITUDINAL AXIS OF SAID NECK, A PERIPHERALLY CONTINUOUS OUTWARDLY FACING SURFACE EXTENDING DOWNWARDLY FROM THE LOWER END OF SAID CONCAVE SURFACE AND A LOWER SURFACE EXTENDING DOWNWARDLY AND INWARDLY FROM SAID OUTWARDLY FACING SURFACE TO A MEETING POSITION WITH SAID NECK, A LIGHTWEIGHT HAND TEARABLE METAL CAP SEALINGLY ENGAGED ABOUT SAID LIP FORMATION, SAID CAP HAVING A DISC-LIKE TOP AND A PERIPHERAL SKIRT EXTENDING DOWNWARDLY FROM SAID TOP, SAID SKIRT HAVING AN UPPER GASKET RECEIVING PORTION AND A LOWER RADIALLY INWARDLY FORMED SECURING PORTION, A GASKET HAVING A ROUNDED CROSS-SECTIONAL CONFIGURATION FORMED IN SITU AT THE JUNCTURE OF SAID SKIRT AND SAID TOP, SAID GASKET HAVING A GREATER RADIUS OF CURVATURE IN VERTICAL CROSS-SECTION THAN SAID CONCAVE RECESS WITH SAID ENTIRE RECESS BEING IN DIRECT UNDERLYING ENGAGEMENT WITH SAID GASKET, SAID GASKET EXTENDING RADIALLY INWARDLY SLIGHTLY BEYOND THE UPPER EDGE OF SAID UPPER CONCAVE RECESS AND COMPRESSED BETWEEN SAID CAP TOP AND SAID TOP SURFACE OF SAID LIP, THE INTERIOR SURFACE OF SAID LOWER SKIRT PORTION BEING IN DIRECT CONTINUOUS ENGAGEMENT ABOUT THE ENTIRE SAID LOWER DOWNWARDLY AND INWARDLY EXTENDING LIP SURFACE AND SAID SKIRT TERMINATING IN A DOWNWARDLY FACING FREE EDGE ADJACENT SAID NECK.