| 摘要 |
<p>A releasable cap (12) includes an inner cap surface and an inner peripheral wall, and a seal for forming a seal between the cap (12) and an upper edge of a rim of a structure (10). The seal extends from the inner cap surface and is arranged concentric with respect to the inner peripheral wall so as to form a gap (18) between the outer edge and the inner peripheral wall for receiving the upper edge of the rim. A flange (14) integrally connects the cap to the structure (10) wherein the flange is formed from a flexible material so as to permit bending of the flange so that the cap (12) can move from a first position wherein it is seated on the strucuture to a second position wherein it is not seated on the structure.</p> |
