| 摘要 |
A closure arrangement for containers of the type comprising an annular upper wall (13) having an outer edge (13a) hermetically affixed to a lateral wall (11) of the container, and an inner edge (13b) defining an upper opening (14) to be closed by a lid (20), which comprises a peripheral wall (22) externally provided with a first and a second circumferential groove (23, 24) and an annular flange (25), incorporating a pending circumferential projection (26), said lid (20) being mounted in a first closing position, in which the inner edge (13b) is fitted in the first circumferential groove (23) defining a first sealing region and the pending circumferential projection (26) is fitted in the circumferential recess (16) defining therein a second sealing region, said lid (20) being mounted in a second closing position, after the first opening, in which the inner edge (13b) is fitted in the second circumferential groove (24), retaining the latter and defining therein a third sealing region.
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