| 摘要 |
A pop-in tab container lid for sealed association with a container body is disclosed. The lid includes a closure panel having a severable score line which extends about a portion of the panel and terminates in spaced oppositely disposed extremities to define a depressible tab and a tab hinge portion between the extremities. The tab has a short stiffening rib and a long stiffening rib extending between the hinge portion and a segment of the score line which is diametrically opposite the hinge portion. Each rib has an inner end opposing that of the other rib so that the ribs are arranged end to end along a common line. An outer end of the short rib terminates at the segment of the score line and an outer end of the longer rib terminates at the hinge portion. The inner opposing ends of the ribs define a weaker area such that when either or both ribs are subjected to a pressing force, the weaker area will bend inwardly towards the container's interior and the ribs will move about their respective outer ends to an inwardly disposed bent position. Such bending movement will concentrate the pressing force at the segment of the score line to initiate fracturing of this segment and continued application of the pressing force will completely sever the tab about its score line to provide an opening in the panel. Modifications disclosed have the outer end of the short rib extending beyond the score line and on the score line and another embodiment has two sets of short and long ribs on a single tab.
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