| 摘要 |
<p>The invention relates to a threaded safety closure, comprising a stoppering part (1) whose lateral skirt (2) has an internal screw thread capable of interacting with the outer screw thread of the neck (3) of a container, the said stoppering part (1) being capped by an actuating part (4) held on the said stoppering part (1) with a limited vertical clearance, it being possible to obtain unscrewing of the stoppering part (1) only by applying a minimum vertical force on the actuating part (4) in order to overcome the mutual sliding of the meshing means carried respectively by the said actuating (4) and stoppering (1) parts, the said closure being characterised, on the one hand, in that the stoppering part (1) comprises a sealing lip (6) with a double skirt (7, 8) inserted inside the neck (3) of the said container in order to stress the inner wall of the said neck (3) towards the outside and, on the other hand, in that the actuating part (4) has a cylindrical collar (11) extending downwards in order to engage exactly in an annular groove (12) provided between the two skirts (7, 8) of the sealing lip (6) of the stoppering part (1), this collar (11) being provided with a circular rib (13) intended to engage under a retainer ring (14) provided for this purpose on one of the two skirts (7, 8) of the said sealing lip (6), the inner skirt (8) being pushed back outwards at its top part by a membrane (9), closing the stoppering part (1) in its centre and acting as a stiffener. <IMAGE></p> |
