Snap-shut stopper having a projecting tab for a container neck

摘要

A stopper for a container neck having a skirt centered on an axis, and an internal snapping device. The snapping device fastens the stopper to the neck by engaging with an edge of the neck and an external disengagement tab projecting outwards from the skirt and running over a peripheral portion of the skirt. The skirt includes an external collar projecting outwards and running over a peripheral portion of the skirt distinct from the portion associated with the tab, by being separated from the portion associated with the tab at either end around the periphery of the skirt. At least a portion of the collar that runs through greater than 180° about the axis includes, in cross-section relative to the axis, a circular outside profile centered on the axis and having a radius substantially equal to the maximum radial distance between the axis and the outside profile of the tab.