Perforated plug suitable for taking liquids from a container with flexible walls

Claim 1

IN A DISPENSING PLUG FOR DISPENSING LIQUID FROM A CONTAINER HAVING FLEXIBLE WALLS, A TUBULAR TERMINAL PLASTIC MEMBER HAVING AN AXIAL BORE AND BEING TERMINALLY BEVELLED, SAID TUBULAR MEMBER HAVING AT ITS END OPPOSITE SAID BEVEL A FRUSTO-CONICAL EXTENSION WHICH IS FLARINGLY TAPERED LARGER AWAY FROM SAID BEVEL, A CYLINDRICAL SECTION HAVING AN ENLARGED SHOULDER TERMINAL PORTION HAVING A RADIAL FACE WHICH ABUTS THE LARGER TERMINAL FACE OF SAID FRUSTO-CONICAL EXTENSION AND HAS A DIAMETER SOMEWHAT SMALLER THAN THE DIAMETER OF SAID LARGER TERMINAL FACE OF SAID FRUSTO-CONICAL EXTENSION, A CYLINDRICAL BOSS MOUNTED COAXIALLY WITH SAID CYLINDRICAL SECTION AND HAVING A FLAT RADIAL FACE WHICH ABUTS THE RADIAL FACE OF SAID SECTION REMOTE FROM SAID SHOULDER PORTION, SAID BOSS AND SAID SECTION AND ITS SHOULDER PORTION HAVING A CONTINUOUS AXIAL BORE WHICH COMMUNICATES WITH THE AXIAL BORE IN SAID TUBULAR TERMINAL MEMBER AND ITS EXTENSION, AND A FLEXIBLE RUBBER SLEEVE MOUNTED SURROUNDING SAID CYLINDRICAL SECTION AND ITS ENLARGED TERMINAL SHOULDER PORTION AND EXTENDING BETWEEN THE LARGER TERMINAL FACE OF SAID FRUSTOCONICAL EXTENSION AND THE RADIAL FACE OF SAID BOSS WHICH ABUTS THE RADIAL FACE OF SAID SECTION REMOTE FROM SAID SHOULDER, SAID SLEEVE PROVIDING A TIGHT SEAL WITH THE FLEXIBLE WALL OF SAID CONTAINER WHEN SAID PLUG HAS PENETRATED SAID WALL OF SAID CONTAINER, AND THE PORTION OF SAID SLEEVE OVER SAID SHOULDER PORTION OPPOSING THE WITHDRAWAL OF SAID PLUG AFTER ITS INSERTION THE WALL OF SAID CONTAINER.