Stopper of flasks of sterile products has protector with an extension starting from the inner projection to form a labyrinth enclosure with respect to the particles in suspension in the air surrounding the flask

摘要

A protector is joined to a plug which has a lateral wall (23) with an inner projection (26) for engagement with an annular protrusion (14) located at the outer surface of the mouth of the container. The protector has an extension (25) starting from the projection to form a labyrinth enclosure (22) with respect to the particles in suspension in the air surrounding the flask. The closure is formed by the combination of the extension and the transition zone between the neck and the main body of the flask. An independent claim is also included for the use of the stopper.