| 摘要 |
<p>A closure member for a metal container comprising a plastic sleeve member snapped into an opening in the metal container and a plastic plug removably received within the sleeve member. The sleeve member has a radially projecting shoulder at one end which extends into an annular groove in an embossment on the metal container surrounding the opening therein. During insertion of the sleeve member into the container opening, the radial shoulder is bent radially inwardly by the smaller diameter surface of the embossment adjacent the annular groove therein to permit movement of the radial shoulder therepast, after which the radial shoulder returns to its original shape where it is confined within the annular groove, locking the sleeve member in place. An axially and radially inwardly extending lip on the embossment overlies the radial shoulder on the sleeve member providing a frusto-conical bearing and sealing surface for sealing engagement by a frusto-conical shoulder on the plug when tightened in the sleeve member.</p> |
