Stopper for a container neck and machine for moulding a...

Details Stopper for a container neck and machine for moulding a... Stopper for a container neck and machine for moulding a...

B - Operations, Transporting

65

D

B65D 41/04 (2006.01) B29C 45/26 (2006.01) B65D 51/16 (2006.01)

Patent

CA 2727261

The stopper (1) has a tubular skirt (12) for fastening it around the container neck, an end wall (10) perpendicular to the central axis (X-X) of the skirt, and an annular sealing lip (16) extending into the skirt from the inner face (10A) of the end wall. A protrusion (22) connects the inner face of the end wall to the inner face (16B) of a peripheral portion of the lip in order to transmit a movement of the end wall to the lip in the event of excess pressure in the container. In order to release this excess pressure reliably and in a manner which is easy to carry out, the protrusion occupies all the space delimited jointly by the inner face of the end wall, by the inner face of said lip portion and by a geometric plane (P) which passes through said lip portion and intersects the inner face of the end wall along a straight line (L) orthoradial to the axis of the skirt.

Le bouchon (1) comporte une jupe tabulaire (12) de fixation autour du col de récipient, une paroi de fond (10) perpendiculaire à l'axe central (X-X) de la jupe, et une lèvre d'étanchéité annulaire (16), s'étendant à l'intérieur de la jupe depuis la face interne (l0A) de la paroi de fond. Un relief saillant (22) relie la face interne de la paroi de fond et la face intérieure (16B) d'une portion périphérique de la lèvre, afin de transmettre à la lèvre un mouvement de la paroi de fond en cas de surpression dans le récipient Pour obtenir un effet de libération de cette surpression de manière fiable et facile à réaliser, le relief saillant occupe tout l'espace délimité conjointement par la face interne de la paroi de fond, par la face intérieure de ladite portion de lèvre et par un plan géométrique (P) qui passe par ladite portion de lèvre et qui coupe la face interne de la paroi de fond suivant une ligne droite (L) orthoradiale à l'axe de la jupe

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