| 摘要 |
<p>A metal screw-cap and deformable plastic overcap are combined to provide a security closure. The overcap in its normal undeformed condition is freely rotatable about the screw-cap. The overcap is deformed by radial pressure to engage its serrations with the knurled screw-cap, thereby allowing removal and reapplication to a container neck. The overcap is provided with strategically placed slits or voids about its periphery which enhance its flexibility. This enables the adult user not only to see the inner cap but also serves to guide him to apply sufficient pressure to achieve a more tightly closed cap. The slits insure that he is adequately gripping the inner cap. The slits also permit the user to see if the overcap is slipping rather than engaging the screw-cap.</p> |
