| 摘要 |
A tamper-indicating and child-proof closure for a container having a threaded neck and a beaded pouring lip comprising an upper skirt and a lower skirt. The upper skirt includes an internal annular snap-on bead which seats under the pouring lip. The lower skirt includes internal threads complementary to the neck threads and outwardly spaced therefrom. The upper and lower skirts are non-severably connected along a short arc and severably connected by horizontal fracture bridges along substantially circumferential contact surface. The normal spacing of the lower skirt threads from the neck threads permits turning of the closure without removal thereof until the lower skirt is deflected inwardly to engage the threaded neck. Upon deflection of the lower skirt and a small amount of rotation, a portion of the snap-on bead is progressively uplifted over the pouring lip resulting in the eventual removal of the closure during which circumferentially spaced bridges joining the upper and lower skirts are fractured to permit the removal of the closure and additionally provide a tamper-indicating function.
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