| 摘要 |
In order to improve the gas-venting characteristics of bottles containing fizzy drinks, the invention calls for the bottle finish (1) and cap (11) to have a double screw thread made up of two threads (3, 13) which extend through an angle of between 240~ and less than 360~, preferably 280~, and which are staggered at 180~ with respect to each other, thus forming on the outside surface (2) of the bottle finish (1) first zones (5) in which the threads (3) overlap in the vertical plane and second zones (16) in which there is only one thread (3) in the vertical plane. Likewise, the inside surface (12) of the cap (11) has first zones (15) in which the threads (13) overlap in the vertical plane and second zones (16) in which there is only one thread (13) in the vertical plane. In each of the zones (5, 6, 15, 16), there is in each thread (3, 13) at least one gas-venting gap (4, 14).
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