Screwable closure cap with security against over-tightening

Details Screwable closure cap with security against over-tightening Screwable closure cap with security against over-tightening

B - Operations, Transporting

65

D

B65D 41/04 (2006.01)

Patent

CA 2157195

In the case of over-tightening of the closure-cap on a beverage bottle (through turning in the wrong direction) there is the risk that, due to the high internal pressure, not only will the thread jump, but also that the cap will be ejected directly from the container. In order to avoid this risk, the invention proposes a screwable closure-cap with security against over-tightening. This cap possesses a ramp element (3) on the end of the thread oriented towards the cap-base, said ramp element being able to engage with the thread-start of the container mouth in the case of over- tightening of the closure-cap. As a result, the cap-wall in the area of the ramp element will be forced outwards in the case of over-tightening so that jumping of the thread in this region will be facilitated. In this way, jumping of the thread on one side only = on the ramp element side = will be achieved when over-tightening is continued, so that ejection of the closure-cap will not be possible. In a further embodiment of the invention, retention elements (7,8) are arranged in the region of the seal. As a result of over-tightening and subsequent deformation of the region of the seal, said retention elements will make contact with the container mouth and the sealing-line will be interrupted. As a result, the container will be vented prior to jumping of the thread.

Lorsqu'un bouchon d'obturation d'une bouteille pour boisson est serré excessivement (en le tournant dans le mauvais sens), on risque que, par suite de la pression interne élevée, non seulement le bouchon sorte de son filetage, mais également qu'il saute. Pour éviter cet inconvénient, l'invention propose un bouchon à système de protection en cas de serrage excessif, caractérisé en ce qu'il est prévu, à l'extrémité du filetage intérieur tournée vers le fond du bouchon, un élément d'amorçage (3) qui, en cas de serrage excessif, vient en prise avec l'entrée filetée du goulot de la bouteille. La paroi du bouchon se trouve ainsi, en cas de serrage excessif, poussée vers l'extérieur, dans la zone de l'élément d'amorçage, ce qui facilite la sortie du bouchon de son filetage dans cette zone. De ce fait, si le serrage se poursuit, le bouchon sort de son filetage seulement du côté de l'élément d'amorçage et ne peut sauter. Selon une variante d'exécution de l'invention, il est prévu des éléments de maintien d'ouverture (7, 8) dans la zone d'étanchéité. La déformation de cette zone d'étanchéité se produisant durant le serrage excessif, lesdits éléments viennent en contact avec l'ouverture de la bouteille et les lignes d'étanchéité sont interrompues, de sorte que de l'air est admis dans la bouteille avant que le bouchon sorte de son filetage.

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