Abstract: A pressure pack dispenser (100) for dispensing a product comprises a cylindrical container (401) with a product outlet through which the product is dispensed, a composite piston (408) movably mounted within the container, and a pressurised propellant. The composite piston comprises a first upper piston (409A) coupled to a second lower piston (409B) to permit limited relative axial movement and a viscous sealant material (410) located between the first and second pistons. The propellant comprises a compressed gas which remains in the gaseous phase as the piston (408) moves from a first full position to a second exhausted position, or a mixture of a liquid propellant and a compressed gas selected such that in the full position the mixture is at a pressure greater than the vapour pressure of the liquid propellant. A clearance is provided between the second lower piston (409B) and the container wall (401A) which is filled with the sealant (410) as the composite piston moves to expel product.

Abstract: A dispensing apparatus (10) for dispensing a product from a container (12) includes: a product chamber within the container (12); a valve (14) adjacent to the product chamber; a hinge assembly secured to the opening of the container and to which is connected a nozzle assembly (20); and a lever (18) attached by a hinge assembly. The nozzle assembly (20) is rotatable between open and closed positions and includes an actuator portion provided with a cam surface (96, 98) which co-operates with a bearing portion (100) on the lever (18) such that, when the nozzle assembly (20) is in the open position, operation of the lever (18) causes movement of the actuator portion to open the valve (14) and permit flow of the product out of the container (12).