| 摘要 |
A covering member (1; 1'; 1'') for mounting on a fastener ring (2), the ring and the covering member co-operating with each other to form a fastener device for fastening a dispenser system (3), such as a pump or a valve, on a receptacle neck (40), the covering member presenting a general configuration that is substantially cylindrical and that includes an outside wall (14) and an inside wall (15) for coming into clamping contact around the ring (2), the inside wall forming projections (17) that project inwards from a base zone (151), the projections being disposed as elongate ribs (16; 16'; 16''), the covering member being characterized in that each rib is formed by a plurality of projections (17) that are separated by gaps (18) in such a manner as to form a projecting rib that is interrupted locally.
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