| 摘要 |
<p>A closure cap (20) and method of making the same wherein an annular or ring-shaped gasket (32) is injection molded onto the inner surface (23) of a cap shell (22) formed of plastic or metal. The annular or ring-shaped gasket includes radially extending tabs (37,38) integrally formed therewith, one of said tabs (37) being formed at a location wherein the plastic melt is fed to an annular gasket-forming channel (67) in a mold core (52) and another of said tabs (38) being formed at the location wherein plastic melt is discharged from said channel. Preferably, said other tab includes a cold well formation (73) which communicates with the annular gasket through a connecting portion (74) of reduced cross-sectional area with respect to the cross-sectional areas of both the gasket and the cold well formation.</p> |
