Abstract: A closure device for releasing an additive liquid into a liquid in a container by operation of the closure device and to a container including such a closure device. The closure device including a cap member defining a fluid chamber having a neck at a lower end thereof and a casing substantially surrounding the fluid chamber. A plug member extends into the neck of the fluid chamber. The neck has an upper portion with a first diameter, and wherein the plug member comprises a primary seal adapted to seal between the plug member and the upper portion of the neck. An upper seal is adapted to seal between the plug member and the upper portion of the neck. A nozzle is directed away from the fluid chamber and in fluid communication with the exterior surface of the plug member below the primary circumferential seal.

Abstract: A closure device for releasing an additive liquid into a liquid in a container by operation of the closure device and to a container including such a closure device. The closure device including a cap member defining a fluid chamber having a neck at a lower end thereof and a casing substantially surrounding the fluid chamber. A plug member extends into the neck of the fluid chamber. The neck has an upper portion with a first diameter, and wherein the plug member comprises a primary seal adapted to seal between the plug member and the upper portion of the neck. An upper seal is adapted to seal between the plug member and the upper portion of the neck. A nozzle is directed away from the fluid chamber and in fluid communication with the exterior surface of the plug member below the primary circumferential seal.

Abstract: A gas storage and dispensing system is described for the substantially reversible storage of a gas. The system comprises a material (4) having open voids occupied by a liquid. The liquid is a solvent of the gas and such occupation of the open voids by the liquid, with the gas dissolved therein, forms a reversible sorption gas storage system. The system tends to sorb increasing quantities of gas in increasing ambient gas pressure and desorb previously sorbed gas with decreases in ambient gas pressure. The system may be used in a pressure pack dispenser for dispensing a product (11) under pressure of a propellent gas, where the system provides the source of pressurised propellent gas.

Abstract: Systems for storing and dispensing gases. The gas storage systems are two-phase gas/solid or gas/liquid, or three-phase gas/liquid/solid, functioning by reversible sorption. In gas storage systems having a solid phase, use is made of a polymeric material, preferably a hydrogel, having microvoids functioning as interstitial stores for gas. Reversible gas sorption in the microporous polymer is improved by treatment with a swelling promoter. The stored gas may be a propellant, and reversible sorption propellant storage may be used in all types of pressure pack dispenser. Cryogenic techniques facilitate preparation of propellant systems with standardized parameters. The invention enables use of safe and environmentally benign gases as propellants.

Abstract: The valve of an aerosol can is actuated by a lever having a handle portion and an intermediate portion bearing on a lock member. The lever is pivotably mounted in a clip. The lock member is in screw-threaded engagement with the valve for movement the realong between closed and open positions. The lock member can be placed in any intermediate position to set a desired flow rate through the valve when the lever is depressed by the user.

Abstract: Apparatus for dispensing material under propellant pressure, particularly highly viscous material, includes a container having a piston therein, the material to be dispensed being located on one side of the piston and the propellant on the other. Penetration of propellant into the material to be dispensed is prevented by providing sealant which engages the container wall and slides with the piston, the sealant being of flowable material such as organic and mineral liquids and greases and mastics based on these or aqueous based gels and mastics.