Patent ID: 6971555

Claim:
In a dispensing assembly comprising a dispensing head including a nozzle and a canister defining an interior for contents, the canister affixed to the dispensing head, a tube extending from the dispensing head into the canister for fluid communication between a liquid in the canister and the nozzle and a source of gas pressure for pressurizing the interior of the canister to force the contents through the tube for egress from the nozzle, a hollow cartridge including a side wall and at least an upper and lower wall defining a compartment, each wall including a port for communication between the compartment and the exterior of the cartridge, pressure activated valves normally sealing the ports, the cartridge being adapted for assembly on the dispensing head and for being received in the canister when the canister is affixed to the dispensing head, the cartridge normally maintaining a component separate from the contents of the canister and releasing the component responsive to gas pressure from the source for simultaneous dispensing of the component in the cartridge together with the contents of the canister.