Closure assembly with valve and method for its manufacturing

Closure assembly for a container for containing a substance, closure assembly comprising: - a cap (1, 101, 201) closure is attached or can be attached to the container cap (1, 101, 201) of closure having a body (2, 102, 202) with a peripheral wall (3, 103, 203) and a wall (4, 104, 204) top equipped with a conduit (5, 105, 205) dispensing whose body (2, 102 , 202) is open on the opposite wall (4, 104, 204) than to be placed in a top end of the container, - a valve (20) resiliently resealable, which is arranged in the cap (1) closing to close the duct (5) dispensing and comprising a portion (21) center, which is provided with at least one through slit (22) is closed and seals the inside of the container when it is in an unloaded state, and can be deformed by pressure from inside the container to a state in which the slit (22) is open to allow dispensing of a substance from the container, said valve (20) closing a skirt (23) further comprising extending downward from the peripheral edge of the portion (21) center, characterized in that the dispensing passage is defined by a collar (6, 106, 206) tubular arranged in the wall (4, 104, 204) upper collar has a lower end (7) extending beyond a surface (4b) bottom wall (4) above, because on the surface (4b) bottom wall (4, 104, 204) upper, a round wall or plurality of lips (8, 108, 208) arranged in a round configuration are integrally formed a coaxial and radially away outwardly from the collar (6, 106, 206) so that between the lower end (7) of the collar (6) and the round wall or lips (8) a seat (10, 110, 210) annular forms because the skirt of the valve on its lower end has a flange (24) extending outwardly tab ( 4, 104, 204) of the valve (20) having an outer portion (25) thickened with respect to the rest of the flange (24), wherein the skirt (23) of the valve (20) is arranged concentrically in the collar (6, 106, 206) of the cap (1, 101, 201), the flange (24) of the valve (20) it is located against the lower end (7) of the collar (6, 106, 206) and extends radially outwardly beyond it, and the part (25) thickened flange is housed in the seat (10), and that the cylindrical wall or lips (8, 108, 208) are folded over the portion (25 ) thickened flange (24) so ​​that the part (25) thickened flange (24) is wrapped between the upper round wall or lips (8, 108, 208) and the wall (4, 104, 204) so that the valve (20) in the cap (1, 101, 201) closure is secured, and that the wall (4) above is generally flat and with respect thereto has a central portion (4a) extending out, which is preferably conical, in whose center is located the collar (6), wherein, preferably, the round wall or lips (8) in the folded state extend into the portion (4a) Central wall (4) above, that is, they do not extend beyond the level of the flat portion (4c) of the upper bottom wall surface (4), in which a sheet 88 sealing, in particular a sheet induction sealing is arranged in the closure assembly against the flat portion (4c) of the wall (4) above.