Rapid unstopping and restopping screw stopper made of plastic material

摘要

The invention relates to a screw stopper made of plastic material making it possible to unstop and restop a bottle rapidly. The stopper comprises a body with an external grasping crown 3 and a tear-off tamper-proofing ring 4 which is connected to it by a line of low strength 5. The grasping crown 3 has on its internal face a two-start thread 8 which is intended to cooperate with a complementary thread, also a two-start thread, on the ring of the bottle. A rotation of the stopper through a quarter of a turn ensures the unstopping whilst the restopping can be achieved by clipping. <IMAGE>