Container with closing device

Claim 1

THE COMBINATION OF A CONTAINER INCLUDING A NECK HAVING A POURING OPENING WITH AN EXTERNAL, ANNULAR BEAD EXTENDING AROUND SAID POURING OPENING; A SOCKET OF RESILIENT PLASTIC MATERIAL INCLUDING AN ANNULAR WALL FITTING ONTO SAID NECK AND HAVING AN INTERNAL ANULAR GROOVE INTERMEDIATE THE OPPOSITE ENDS OF SAID WALL AND RECEIVING SAID BEAD, THE PORTION OF SAID ANNULAR WALL BELOW SAID INTERNAL GROOVE BEING SPACED RADIALLY FROM SAID NECK BELOW SAID BEAD, SAID ANNULAR WALL HAVING A FRUSTO-CONICAL OUTER SURFACE WITH UPPER AND LOWER ANNULAR SEALING SURFACE PORTIONS DISPOSED RESPECTIVELY ABOVE AND BELOW SAID GROOVE AND WITH AN ANNULAR, OUTWARDLY OPENING RECESS BETWEEN SAID SEALING SURFACE PORTIONS, SAID RECESS BEING OPPOSITE SAID GROOVE AND EXTENDING ABOVE AND BELOW THE SAME; AND A CLOSING CAP REMOVABLY FITTING OVER SAID SOCKET AND INCLUDING AN ANNULAR SIDE WALL HAVING A FRUSTOCONICAL INNER SURFACE ENGAGING SAID SEALING SURFACE PORTIONS OF THE SOCKET TO URGE SAID WALL OF THE LATTER RADIALLY INWARD ABOVE AND BELOW SAID GROOVE FOR ENSURING SEALING ENGAGEMENT OF THE LATTER WITH SAID BEAD.