PURPOSE: To improve the printing quality free from the attaching of paper powder and dirts to the surface of a nozzle by jetting air from a jet port provided on an air chamber surrounding the surface of a print head to blow against a recording paper.
CONSTITUTION: A member 16 having an air jet port 15 is provided in front of a nozzle 3 of a print head 1 surrounding the nozzle 3. An air chamber 17 connected to the jet port 15 is connected to a filter 19 for purifying air and an air blow pump 20 with an air supply tube 18. Purified air from the pump 20 is jetted out of the jet port 15 and flows to a recording paper 5 from the side of the nozzle 3. At this point, an air current 21 should not affect the flying of ink liquid drop injected from the nozzle 3 thereby keeping paper powder and dirts or the like 22 floating therein 21 from attaching to the surface of the nozzle 3.
SATOU TOORU
MATSUDA TADASHI
