| 摘要 |
A stopper for flasks for pharmaceutical products, characterized in that it comprises, in combination: a plug with resilient means for adjustment to the inner face of the neck and of the mouth of the container and an upper stoppering wall; means for defining a position for pre-stoppering of the flask, before the stoppered position; a protector joined to the plug which comprises a lateral wall of synthetic material, said lateral wall having a projection for engagement with an annular protuberance located on the mouth of the container; the aforesaid protector having an extension which, when the stopper is in its pre-stoppered position, creates a labyrinth closure with respect to the particles which might be present in the surroundings in which the container is being handled. |
