APPARATUS FOR GENERATING FINE LIQUID DROPLET MIST

摘要

PURPOSE:To carry out uniform printing certainly by a method wherein the mist issued from a generating chamber is passed through a narrow elongated passage and ink mist with a uniform composition is produced. CONSTITUTION:A liquid ink 88 introduced into an ink supply chamber 83 through an inlet 89 is converted to innumerable fine droplets in an upper portion above a level of a liquid ink 88 within a mist generating chamber 84 operating ultrasonic converters 85. The air saturated with a solvent vapor is introduced under pressure into a mist generating chamber 84 and the mist is formed by mixing with ink fine droplets. The mist is passed through a mixing slit 97 from a mist generating chamber 84 through a lip 96 and flowed into a mist outlet chamber 99, and, thereafter flowed out from an outlet slit 93. A lip 96 forming a mixing slit 97 acts as a dam and the turblent stream is generated within a mist outlet chamber 99 in a mixing slit 97 to mix with the mist and the mist is uniformly distributed along an outlet of a slit 93. The mist is maintained smaller than the preliminarily determined fine droplets size by passing through a screen 94 and 95.