Patent ID: 7608149

Claim:
An array of nozzles for use in coating by high-pressure spraying techniques a web of material moving in a first direction, the array of nozzles comprising: at least one row of a plurality of secondary spray nozzles oriented transverse to the first direction; wherein each secondary spray nozzle has portions defining a tapered duct, tapering to a closed tip in which a V-shaped groove has been machined, the V-shaped groove defining a secondary nozzle orifice defining a transverse nozzle orifice area, the secondary nozzle orifice arranged to form a jet of coating material; and wherein the V-shaped groove has a first side and a second side which intersect to define an angle which is between 25 to 50 degrees; wherein each secondary spray nozzle is connected to a preliminary nozzle, and wherein the preliminary nozzle starts from a preliminary nozzle orifice which leads into an expanding duct, the expanding duct being connected to the tapered duct of the secondary spray nozzle so that a flow into the preliminary nozzle orifice leads into the expanding duct of the preliminary nozzle and then into the tapered duct of the secondary spray nozzle and then to the secondary nozzle orifice.