Dispensing valve

摘要

A dispensing valve (3) for fluid product packaging comprising: a flange (4); a valve head (5) having a marginal edge (42) and interior and exterior sides (39, 38) and an orifice (6); a resiliently flexible sleeve (7), with one end portion (50) thereof connected with the flange (4), and an opposite head end portion (49) thereof connected with said head (5) adjacent the marginal edge thereof. When pressure is applied to the head the sleeve has a doubled over rolling exterior rim (65) which rolls along the sleeve to be at the head end portion (49) of the sleeve when the sleeve is in a fully extended configuration thereof in which the orifice is closed, forces applied thereafter to the head by the sleeve and pressure in excess of the predetermined discharge pressure causing an unrolling of the doubled over rim (65) as the orifice (6) opens. The valve quickly and accurately achieves a balance between container, valve and fluid product. <IMAGE>