| 摘要 |
<p>A lid for a container having an inner rim (12) extending around the top of side wall (16) includes a substantially flat central portion (4), a trough-shaped edge portion (14a) comprising rigid inner wall (15a) and outer wall (17a) connected by a bridge element (19a), and a sealing ring (18a) on the outer wall (17a) for sealingly engaging the inner rim (12) of the container. The central portion (4) is hingedly connected to the inner wall (15a) via hinge (5), and the bridge element (19a) is rigid and hingedly connected to both the inner wall and the outer wall at its terminal ends (38, 40), so that when a vertical force is applied to the lid from inside the container, the bridge element translates the vertical force exerted on the under side of the lid into a lateral force exerted on the outer wall of the edge portion, thus maintaining the seal between lid and container.</p> |
