Bottle finish and closure cap with double screw thread

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 51/16 (2006.01) B65D 1/02 (2006.01) B65D 41/04 (2006.01)

Patent

CA 2242344

For improving the venting behaviour of containers with beverages containing carbon dioxide, a container finish (1) and a closure (11) is provided with a twin-start thread. The thread comprises in each case two threads (3, 13) which extend over an angle of 240° to less than 360°, preferably 280°, and which are arranged so as to be displaced at 180°. In this way, initial or first sections (5), in which the threads (3) overlap each other vertically, are formed on the outside surface (2) of the container finish (1), as well as second sections (6) in which, vertically, only one thread (3) is arranged. On the inside surface (12) of the closure (11), initial or first sections (15) are formed in which the threads (13) overlap each other vertically, as well as second sections (16) in which, vertically, only one thread (13) is arranged. In each of the sections (5, 6, 15, 16), at least one venting recess (4, 14) is arranged per thread, said venting recess interrupting the threads (3, 13).

En vue d'améliorer les caractéristiques de désaération de récipients renfermant des boissons gazeuses, l'invention a pour objet un goulot de bouteille (1) et une fermeture (11) comportant un filetage à double pas. Le filetage comprend deux pas de vis (3, 13) qui s'étendent sur un angle compris entre 240 DEG et moins de 360 DEG , de préférence à 280 DEG , et qui sont décalés de 180 DEG l'un par rapport à l'autre. On forme ainsi, sur la face extérieure (2) du goulot (1), des premières zones (5) dans lesquelles les pas de vis (3) se chevauchent dans un plan vertical, et des deuxièmes zones (16) dans lesquelles il n'est prévu qu'un seul pas de vis (3) dans un plan vertical. Sur la surface intérieure (12) de la fermeture (11), on forme des premières zones (15), dans lesquelles les pas de vis (13) se chevauchent dans un plan vertical, et des deuxièmes zones (16) dans lesquelles il n'est prévu qu'un seul pas de vis (13) dans un plan vertical. Dans chacune des zones (5, 6, 15, 16), il est prévu au moins un évidement (4, 14) interrompant les pas de vis (3, 13), pour la désaération.

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