Patent ID: 10899515

Abstract:
A closure device (210) for dispensing an additive product into a container (34) having a main liquid compartment and an opening with a threaded container neck (38) comprises a cap member (36) having a threaded side wall (37) adapted to be secured to the threaded container neck (38), a pressurised fluid chamber (60) fixed to the cap member (36) containing an additive product, and a plug member housing (54) including a plug member (64) engageable in a bottom aperture (66) of the fluid chamber and a flange portion (58) adapted to extend across the top of the container neck (38). The plug member housing (54) can move relative to the cap member (36) between a first closed or armed position of the closure device, in which the plug member (64) seals the bottom aperture (66) closed, and in which a first detent member (58A) provided on the plug member housing is engaged by a second detent member (80) provided on the cap member to prevent movement of the plug member housing (54) away from the cap member (36), and a second open or firing position, in which the plug member housing (54) is urged towards the cap member (36) by contact with the threaded container neck (38) and the plug member (64) is raised relative to the bottom aperture (66) to provide a fluid path from the fluid chamber (60) through a nozzle (74) to the main liquid compartment of the container (34), so that the closure device (210) is moved to the firing position by screwing down onto the neck (38).