Aerosol-foam dispenser head

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 83/28 (2006.01) B05B 7/00 (2006.01) B65D 83/16 (2006.01) B65D 83/14 (2006.01)

Patent

CA 2164937

A dispensing head for a foam aerosol which is designed to be mounted on a pack containing an active substance solution and an insoluble gaseous propellent and which, on actuation, opens a valve in the pack, characterized in that the dispensing head comprises a flow restriction opening of relatively small cross-section at the front end (looking in the direction of flow) of a flow passage, in that at least one opening communicating laterally with the atmosphere is provided in the wall of the flow passage behind the flow - restriction opening, the cross-section of the opening being distinctly larger than that of the flow restriction open- ing, and in that a fine-mesh sieve or wire is arranged at the rear end of the passage.

Diffuseur (10) pour aérosol à mousse qui peut être placé sur un conditionnement contenant une solution active et un gaz propulseur non soluble et qui, lorsqu'il est actionné, ouvre une soupape (18) du conditionnement et qui présente également un orifice d'étranglement de section relativement faible situé à l'extrémité avant d'un canal d'écoulement (28) lorsqu'on regarde dans la direction de l'écoulement. Ce diffuseur comporte, dans la paroi du canal d'écoulement, derrière l'orifice d'étranglement (24), au moins un orifice (26) relié latéralement à l'atmosphère et dont la section est nettement supérieure à celle de l'orifice d'étranglement. Une grille (32) ou un tamis à mailles fines sont prévus à l'extrémité arrière du canal.

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