Container with pressure compensation holes

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 83/38 (2006.01) B29C 49/22 (2006.01) B65D 1/02 (2006.01) B65D 1/40 (2006.01) B65D 77/06 (2006.01) B65D 83/00 (2006.01)

Patent

CA 2258853

A container is produced by a coextrusion blowing process and contains a stiff outer container (6) and an easily deformable inner bag (7) made of different types of thermoplastic materials which cannot be welded together. The bottom weld seam of the inner bag is clamped in a closed bottom strip (5) of the outer container. The pressure compensation holes (14) are offset by about 90~ relative to the plane which extends through the bottom weld seam and the longitudinal centre line (10) of the container, and so the inner bag collapses only on two sides when its contents are emptied and the negative pressure in the inner bag is reduced.

Le récipient décrit est produit par un procédé de coextrusion par soufflage et contient un récipient extérieur rigide (6) et un sachet intérieur (7) aisément déformable constitués de types différents de matières thermoplastiques qui ne peuvent pas être soudés ensemble. Le cordon de soudure au fond du sachet intérieur est serré dans une moulure fermée (5) au fond du récipient extérieur. Les ouvertures (14) d'équilibrage de la pression sont décalées d'à peu près 90· par rapport au plan qui traverse le cordon de soudure au fond du récipient et l'axe longitudinal médian (10) du récipient, de sorte que le sachet intérieur se contracte uniquement de deux côtés lorsque l'on vide son contenu, ce qui permet de réduire la pression négative dans le sachet intérieur.

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