Thin film beam spring vent valve

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 47/32 (2006.01) B05B 11/04 (2006.01) B29C 63/34 (2006.01) B29C 65/56 (2006.01) B65D 47/20 (2006.01) B65D 51/16 (2006.01) B65D 83/00 (2006.01)

Patent

CA 2097867

A thin film beam spring valve is provided for use in a squeeze pump package. The squeeze pump package includes a resilient outer bottle and an inner flexible bag with a rigid fitment. An apertured diptube is utilized to enable substantially all of the product within the bag to be dispensed. The outer bottle of the package has a substantially cylindrical finish which includes an aperture therethrough and an internally extending ledge at its lower end. The thin film beam spring is located above the ledge in a cavity created between the bottle finish and the rigid fitment of the inner bag. The central portion of the beam spring is located adjacent to the aperture of the finish such that the beam spring will seal the aperture upon exposure to a positive dispensing pressure within the bottle, The beam spring will allow air to enter the bottle upon the application of negative pressure within the bottle. A method and apparatus for inserting the beam spring, and a method and apparatus for inserting the bag into the bottle are also provided.

Cette invention concerne un clapet de mise à l'air libre à ressort à lame en couche mince pour contenant souple. Celui-ci se compose d'une bouteille élastique et, à l'intérieur de cette bouteille, d'un sac souple à goulot rigide. Il est équipé d'un tube plongeur ajouré qui permet de vider quasi complètement le sac souple de son contenu. La bouteille a un col sensiblement cylindrique qui comporte une ouverture et un rebord interne à sa base. Le ressort à lame en couche mince est placé sur le rebord intérieur du col dans une cavité créée entre la paroi intérieure de celui-ci et le goulot rigide du sac souple. La partie centrale du ressort à lame se trouve à proximité de l'ouverture susmentionnée du col pour pouvoir l'obturer sous l'effet d'une pression positive consécutive à la compression de la bouteille pour en extraire le contenu. Ce ressort à lame est conçu pour laisser de l'air pénétrer dans la bouteille dès qu'une pression négative s'y développe. Cette invention concerne également une méthode et un dispositif de pose du ressort à lame et d'insertion du sac souple dans la bouteille.

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