| 摘要 |
<p>The capsule screws onto the neck of the bottle with the start (22a) of the capsule thread encountering a stop (8) on the neck to determine the angular relationship. The pressure of the capsule on the convex head (12) of an outlet restrictor (10) is used to provide resistance to unscrewing. Both components may have threads comprised of two separate lengths (5a,5b,21a,21b), the starting points of the two capsule lengths being defined by diametrically opposed radial walls. The neck lengths extend for less than a turn and their starts are also diametrically opposed, the restrictor providing a reduced outlet (13).</p> |
