| 摘要 |
<p>The invention provides container closure assemblies, especially for carbonated beverage containers, comprising a container neck (10) and a closure (12). A first screw thread on one of the neck (10) and the closure (12) comprises one or more first thread segments (18), and a second screw thread on the other of the neck and closure comprises a plurality of second thread segments (20). The neck and closure are constructed with a pressure safety feature that blocks unscrewing of the closure, and provides for gas venting from inside the container, when the closure (12) is at an intermediate position on the neck (10). The gas venting means includes a recess (66) located between and circumferentially overlapping two of the second thread segments (20), to increase the cross-sectional area of the vent thread path (26) through which the pressurized gas escapes at the intermediate position.</p> |
