COMPOSITE STOPPER WITH CONTROLLED PERMEABILITY

摘要

The invention concerns a composite stopper for closing bottles, in particular wine bottles, comprising a body made of a compressible material such as cork, provided at least at its end facing the contents of the bottle to be closed with matching means forming a joint. Said means consist of an element (25) made from a substantially incompressible elastomer, filling up a cavity arranged circular in shape and in a concentric position in the end surface (24) of the stopper body (22) and having a volume such that said element, under the effect of compression whereto the stopper body is subjected when the bottle is closed, is elastically deformed at the front of said end surface, so as to produce after closure, at the front of the cork body end surface, a sealing joint covering the whole of said end surface and in contact with the bottle neck inner surface (26). The invention is useful for closing bottles of sparkling or non-sparkling wine.