Abstract: The assembly for keeping different substances separate up to the moment of use comprises a container (1) on which is inserted a deformable and internally hollow capsule (2), provided with a cap (3) which closes the capsule (2) and opens same following pressure thereon. The assembly further comprises a cover (4) connected to the container by means of a threaded coupling in such a way as to close the capsule (2). The cover (4), which interacts following screwing with the capsule (2) is constrained to the container (1) when the capsule (2) is closed, and to the capsule (2) when the capsule (2) is open.

Abstract: The cap assembly comprises: a cap which when unscrewed causes a detachment or distancing of a safety strip from the cap; and a convex seal which, when the cap assembly is inserted on a bottle, is deformed by internal pressure in the bottle and guarantees a seal on an internal wall of a bottle neck, even when there are small axial movements of the cap assembly with respect to the bottle neck.

Abstract: A joint is described which has a pair of coaxially aligned elastic rings (5) of truncated conical form the respective vertices of which are directed in opposite ways and are engaged each between a central core (3) externally having an attachment surface (3a) of truncated conical form and an outer collar (4) internally having an attachment surface (4a) of truncated conical form converging towards a vertex (V) which is common to the converging vertex of the attachment surface (3a) of the core (3).Each elastic ring (5) comprises an inner layer made of elastomeric material (10) and an outer layer (11) made of elastomeric material between which a laminar insert piece of truncated conical form (12) is inserted, the inner (12a) and outer (12b) surfaces of which converge towards the common vertex (V) of the attachment surfaces (3a, 4a).The outer elastomeric layer (11) is greater in thickness that the inner elastomeric layer (10).The described joint (1) has an improved fatigue limit.

Abstract: The invention relates to a plastic bottle cap in two parts. The first part (1) of said cap is annular-shaped and exhibits on its external lateral surface a plurality of projections (5), while the second part comprises a screw-up (2) inferiorly to which is connected a breakable seal (4) by means of easy-breaking webs (6); the cap exhibits a plurality of teeth (7), arranged parallel to the webs (6), which, on first screwing-on of the cap on to the bottle, are inserted between the projections (5) of the first part (1) and bear the forces which are generated during the screwing-on; since the teeth (7) are not connected to the breakable seal, the teeth (7) do not obstruct the detachment between the bottle-top and the breakable seal (4) when the cap is first unscrewed.

Abstract: The one-piece twist-off bottle top, used mainly for fizzy or still soft drinks, has a deformable break-open seal (2) that features a succession of recesses (4) exhibiting oblique pyramidal shape. When the top is fitted initially to the bottle, certain of the surfaces of these pyramids are urged gently outward so that the internal diameter of the seal can be enlarged; when the cap is first twisted off, other surfaces are designed to resist on coming up against an annular bead (9) offered by the neck of the bottle, in such a way that the cap and seal are forced to separate.

Abstract: An element for supporting the suspension-springs of railway wagons including a bottom plate, an intermediate plate and a parallel adjacent supporting plate provided with the interposition of first and second elastic rings which are connected to the plates at their respective contacting surfaces. The second elastic ring has a greater rigidity compared to that of the first elastic ring. The greater rigidity is obtained by forming the second ring to have a lesser height (L") than that (L') of the first ring, or by use of an elastomeric material that is more rigid than the material which is used for forming the first ring.