| 摘要 |
<p>A device for closing and resealing an opened container such as a beverage can comprises a threaded cap (13) and a corresponding threaded skirt (22) adapted to be threaded together and apart. The skirt has an upper surface that moves toward and away from a cam surface formed in the underside of the cap as the cap and skirt are threaded together and apart. A compression ring (27) adapted to be compressed and expanded in diameter is captured between the upper surface of the skirt and the cam surface of the cap. As the cap is threaded progressively onto the skirt, the compression ring is engaged by and rides along the cam surface and is thus progressively compressed in diameter. An annular sealing gasket (21) depends from the underside of the cap (13) and is sized to seat about the peripheral portion of the end of the container as the cap moves downwardly toward the top of the container. In use, the assembly is placed over the top portion of a container and the cap is threaded onto the skirt until the compression ring is compressed into gripping engagement with the container at the bottom of the chime thereof whereupon the cap is threaded further until its gasket engages and seats about the periphery of the can end, thus sealing off the can.</p> |
