Patent ID: 8523806

Claim:
A sprayer comprising a first liquid supply containing a first liquid; a second liquid supply containing a second liquid, the first and second liquids having liquid compositions different from one another; a nozzle comprising a nozzle main body and a nozzle head connected to one another; the nozzle head comprising an ejection port passing through a distal end wall at a distal end of the nozzle head; the nozzle body comprising a first tube, a second tube and a third tube; the first tube possessing a lumen forming a first liquid flow path in fluid communication with the first liquid supply; the second tube possessing a lumen forming a second liquid flow path in fluid communication with the second liquid supply; the third tube possessing a lumen forming a gas path connectable to a gas source; a fourth tube constituting a tubular merge part possessing a lumen open at a distal end of the fourth tube, the fourth tube being positioned in the lumen of the third tube, the distal end of the fourth tube contacting the distal end wall of the nozzle head with the lumen of the fourth tube opening into the ejection port; the first tube comprising a distal end; the second tube comprising a distal end the distal end of the first tube and the distal end of the second tube being connected to the fourth tube, with the lumen of the first tube and the lumen of the second tube in communication with the lumen of the fourth tube so that the first and second liquids are mixed together in the fourth tube; and a vent disposed at a point upstream of the distal end of the fourth tube and downstream of the tubular merge part of the fourth tube to introduce the gas into the lumen of the fourth tube; and/or disposed at a point upstream of the distal end of the second tube to introduce the gas into the lumen of the second tube.