Closure arrangement for containers

Closure arrangement for containers of the type comprising at least one lateral wall (11) ending in an upper edge (12) and an annular upper wall (13) having an outer edge (13a) hermetically affixed to the lateral wall (11) and an inner edge (13b) defining an upper opening (14) to be closed by a lid (20), characterized in that the lid (20) comprises a middle wall (21) carrying a peripheral wall (22) externally provided with a first and second circumferential groove (23, 24) and externally incorporating an annular flange (25), in which is inferiorly incorporated at least one pending circumferential projection (26), the annular upper wall (13) being provided with at least one circumferential recess (16), said lid (20) being assembled in a first closing position, after the filling of the product, in which the inner edge (13b) of the annular upper wall (13) is fitted in the first circumferential groove (23) of the lid (20), axially retaining the latter and defining therein a first sealing region and in which the pending circumferential projection (26) of the lid (20) is fitted, by interference, in the circumferential recess (16) of the annular upper wall (13), defining therein a second sealing region, said lid (20) being mounted in a second closing position, after a first opening, in which the inner edge (13b) of the annular upper wall (13) is fitted in the second circumferential groove (24) of the lid (20), axially retaining the latter and defining therein a third sealing region in which the pending circumferential projection (26) is held elevated and unfitted in relation to the circumferential recess (16) of the annular upper wall (13).