Safety valve device for packagings containing products to be...

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 51/16 (2006.01) B65D 77/22 (2006.01) B65D 81/34 (2006.01)

Patent

CA 2186532

A device consisting of a valve (1) with a peripheral portion (2) attached to the packaging support (3), and a movable flap (5) with an end portion (6) connected to the peripheral portion to form a hinge portion exerting a resilient return force determined by bending slots (7) shaped so that the end portion (6) retains a certain degree of rigidity and has a sensitive shape memory function enabling it to be opened by the vapour pressure and dynamically closed on cooling. A projection (10) on the underside of the flap acts as a seal engaging the recess (8) in the packaging support (3) during cooling, and comprises suitably positioned spikes (18) for engaging one or more vapour discharge outlets (9) in said recess (8).

Dispositif constitué par une valve (1) dont la partie périphérique (2) est fixée sur le support d'emballage (3) et par une soupape (5) mobile dont la base (6) est maintenue à la partie périphérique, formant une zone d'articulation dont la souplesse du rappel de ressort est déterminée par des découpes de déformation (7) dont la forme est calculée de façon à garder une certaine rigidité à la base (6) et obtenir une mise en mémoire active sensibilisant cette base pour satisfaire la fonction demandée d'ouverture sous la poussée des vapeurs et de fermeture dynamique lors du refroidissement, Sous la soupape, une pastille (10) fait office de clapet de fermeture dans la cavité (8) du support-emballage (3) au moment du refroidissement, cette pastille (10) comporte des picots (18) se logeant parfaitement dans le ou les orifices (9) d'évacuation de la cavité (8) d'évacuation des vapeurs.

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