Hollow stopper for bottles, tubes or the like, or artificial material, preferably polyethylene

Claim 1

A HOLLOW STOPPER FOR BOTTLES, TUBES, AND THE LIKE OF AN ELASTIC ARTIFICIAL MATERIAL, COMPRISING A HOLLOW CYLINDRICAL MEMBER CARRYING INTEGRALLY THERE WITH AT LEAST ONE FLANGE-LIKE RING MEMBER SURROUNDING PERIPHERALLY SAID HOLLOW CYLINDRICAL MEMBER, SAID RING MEMBER HAVING A TOP FACE DISPOSED IN A PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID STOPPER AND A BOTTOM FACE CURVING UPWARDLY TOWARDS SAID TOP FACE IN OUTWARD RADIAL DIRECTRON, IN ORDER TO TAPER OFF SAID RING MEMBER OUTWARDLY, A PISTON-LIKE GUIDE DISPOSED AT THE UPPER END AND INTEGRALLY CONNECTED WITH SAID CYLINDRICAL MEMBER AND ENGAGING THE INNER FACE OF THE NECK PORTION OF SAID BOTTLES, THE SAID PISTON-LIKE GUIDE HAVING A SMALLER DIAMETER THAN SAID RING MEMBER BUT A GREATER DIAMETER THAN SAID CYLINDRICAL MEMBER, A FLANGE DISPOSED ON TOP AND INTEGRAL WITH SAID PISTONLIKE GUIDE, A SPECIAL COVER PLATE FOR THE SAID FLANGE, A BOTTOM PLATE INTEGRALLY DISPOSED AT THE BOTTOM OF SAID CYLINDRICAL MEMBER, AND SAID FLANGE-LIKE RING MEMBER BEING SEAMLESS IN ORDER TO PROVIDE A SECURE CLOSURE.