| 摘要 |
A cup shaped plastic cover has a plurality of inwardly extending lips adjacent the open end. The upper face of these lips is substantially normal to the inner wall and the lower face tapers from the inner wall to the upper face. The lower face cams the the cap outwardly so that it easily slips over a bead on the can after which the upper face engages the bead to lock the cap against a retraction movement. At one side of the cap there is a tear strip extending upwardly from the open end and having a handle extending outwardly from its lower edge. One of the lips is on this tear strip and the remaining lips are opposite the tear strip lip and at the sides thereof. Above the tear strip are inwardly projecting horizontal reinforcing ribs.
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