| 摘要 |
A stopper for the threaded neck of a receptacle comprises: (a) a base surface (5), and (b) an annular skirt (6) projecting from the base and with an internal thread, and with: (c) a hermetic circular joint (4) of dia. greater than the exterior dia. of the neck of the receptacle, fixed in the body of the capsule adjacent to the base. The body of the capsule has means for tightening the joint against the outer face and the exterior edge of the neck, formed by an interior rim at the intersection of the skirt and the base of the capsule body. The joint (4) is formed by, or contains, a plastic material with high modulus of rigidity, as a barrier against gas, and the rim (9) defines, within the body of the capsule, at a height greater than the thickness of the joint (4), a truncated cone with an angle at the top not greater than 90 degrees C, and fitting together by a concave part (12) with the base (5), and by a concave part (13) with the skirt (6). <IMAGE> |
