| 摘要 |
A common twist or screw on cap for a bottle or like container is converted to a security closure by the addition of a rigid cover member, which may be moved up and down between two axial positions. In one position, the closure is secured because the cover member will rotate freely in either direction without turning the cap. In the other position, closure is non-secured because a band of parallel knurling on the side of the cap is aligned with and engaged by a complementary band of knurling on the inside surface of the sidewall of the cover member such that rotation of the cover member will be transmitted to rotate the cap. The cover member may be snapped axially from the non-secured position to the secured position and vice versa. Alternatively, the knurling may extend diagonally within the bands whereby the cover member will be automatically cammed into the engaged position when turned in one direction, and into the disengaged position when turned in the opposite direction. In this embodiment, the closure may be removed by both twisting and pressing the cover member axially downwardly at the same time.
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