Spraying devices

摘要

A liquid-spraying device, particularly for applying an additive to a moving bed of smoking material. The device includes a body and an elongate narrow unshrouded tubular spray tip carried by the body. First and second ducts are in the body through which the liquid and an atomizing medium respectively can be supplied to the tip. A third duct is provided for supplying a cleaning medium such as air. A jet structure is located remotely from the discharge end of the spray tip, is connected to the third duct and is arranged to direct the cleaning medium along and around the outside of the freely extending tip to the discharge end thereof. The spray tip may be mounted on and extend from a nozzle head connected to the body. The jet structure is provided in the nozzle head, for example, in the form of a plurality of jet orifices equi-angularly spaced around the spray tip. The spray tip and jet can be used in a method of applying a liquid additive to a moving bed of smoking material.