| 摘要 |
<p>An end closure for a container has a central panel, a circumferential countersink (18) formed around the centre panel and adjacent the periphery of the end closure, and a fold (22) formed at the junction between the countersink and the centre panel, the fold having opposite side walls which lie closely adjacent or in contact with each other and project upwards from the end closure. The fold may instead be formed at the base of the countersink. The fold forms an annular rigid zone in the end closure.</p> |
