Protected closure system for test tubes

摘要

Stopper (1) comprises inner body (3), test tube (2), sealing portion (4) and cover (6) having engaging unit. The unit consist of projections (11) which extend on inside of side wall of cover so as to make contact with outer wall of test tube, projections being spaced from closing wall of cover and being able to form contact step capable of constraining projecting collar piece of inner body. Protected stopper comprises substantially cylindrically extending elastomer inner body which can be arranged so as to close a test tube and which comprises a sealing portion formed so as to be inserted into the mouth of the test tube and a collar piece connected above the sealing portion and projecting radially with respect to the latter so as to receive, in bearing contact therewith, the mouth of the test tube, cover made of plastic with a substantially cylindrically extending side wall (9), at least partly delimited at one end by an upper closing wall, the cover being able to be arranged so as to cover the inner body and top part of test tube when the stopper is engaged in the test tube, the cover having engaging unit for simultaneously securing the inner body to the cover and whole stopper on test tube. The engaging unit consist of numerous projections which extends on inside of side wall of the cover so as to make contact with the outer wall of the test tube, the projections being spaced from the closing wall of the cover and being able to form contact step capable of constraining the projecting collar piece of the inner body.