| 摘要 |
The present invention relates to a closure assembly comprising a closure spout (1) adapted to be fitted to the neck of a container and a closure cap. The closure spout (1) comprises a dispensing opening. The closure cap comprises an upper wall and a skirt depending therefrom, adapted to be fitted to the closure spout to close the container, especially for use on pressurized containers such as carbonated beverage containers. At least one substantially continuous second retaining arrangement (5) on said closure spout (1) has one ore more elongate second retaining segments (6). The lower second retaining surface (8) has no pitch or at least a relatively lower pitch in a first region (9),a relatively higher pitch in a second region (10) displaced from the first region (9) in an unscrewing direction (30) and has no pitch or at least a relatively lower pitch in a third region (11) displaced from said second region (10) in a unscrewing direction (30). |
