SPRAY GUN WITH A HOLLOW NEEDLE TO ASSURE GRAVITY FEED AND METHOD FOR USE THEREOF
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United States of America Patent
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app pub date -
Mar 5, 2015
filing date -
Mar 5, 2015
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Abstract
A spray gun and a method for use thereof comprises a spray gun body, an air cap, a fluid spray nozzle having a fluid tip, a hollow needle, at least one air distribution channel for atomizing air, and at least one air distribution channel for fan air, wherein the fluid spray nozzle and the air cap are configured to direct an atomization airflow at an angle of 10 to 75 degrees, preferably 15 to 60 degrees, and more preferably of 30 to 45 degrees (relative to the coating composition jet) into composition jet, and the fluid spray nozzle and the air cap are configured to provide an atomizing air pressure to fan air pressure ratio (AA/FA) of 0.1 to 10, preferably 0.5 to 1.0, more preferably of 0.6 to 0.9, and still more preferably of 0.66 to 0.88.
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