A stopper device for a receptacle neck, a receptacle fitted with such a device, and a method of fabricating such a device

摘要

Disclosed is a stopper device which includes a skirt (12) with a weakened peripheral zone (16) which ruptures when the device is first opened. The skirt includes a first portion (14) adapted to be released from the neck after the weakened zone has been ruptured and a second portion (15) provided with a tongue (17) which projects from the inner surface of the skirt towards the first portion of the skirt. The tongue has a free end (17B) which abuts against an associated swelling (8) of a neck (2) so as to maintain the second portion of the skirt around the neck when the device is first opened. The tongue has an arcuate profile which is substantially curved and convex towards the first skirt portion, in a longitudinal cross-section.