Plastic closing device with a piercing element

Details Plastic closing device with a piercing element Plastic closing device with a piercing element

B - Operations, Transporting

65

D

B65D 5/74 (2006.01)

Patent

CA 2424538

The invention relates to a closing device (1) for a container (B) that comprises a bung-type lower part (2) with a cylindrical pour spout (20). The cylindrical pour spout has a female thread in which a cylindrical piercing element (3) that is open to both sides and that is provided with a male thread is retained by a screw connection. A screw cap (4) can be placed on the lower part, said screw cap being provided with driver means (44, 45) that interact with driver means (34) in the piercing element (3). A fine-pitch thread is provided between the screw cap (4) and the lower part and a coarse-pitch thread between the lower part and the piercing element. The combined screw/translational motion of the piercing element and the selected threads produce a highly effective cutting motion.

La présente invention concerne un dispositif de fermeture (1) destiné à un récipient (B) présentant une partie inférieure (2) en forme de languette comprenant un bec cylindrique (20). Le bec cylindrique comporte un filetage interne dans lequel peut être maintenu par vissage un perforateur cylindrique (3) ouvert des deux côtés et comportant un filetage externe (31). Sur la partie inférieure peut être mis en place un capuchon à vis (4) qui présente des agents d'entraînement (44, 45) qui interagissent avec des éléments d'entraînement (34) appartenant au perforateur (3). Entre le capuchon à vis (4) et la partie inférieure (2) se trouve un filetage fin, et entre la partie inférieure et le perforateur se trouve un filetage grossier. Le mouvement combiné de rotation et de translation du perforateur, et la sélection des filetages permettent d'obtenir un mouvement de découpage extrêmement efficace.

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