LIQUID JET APPARATUS, AND METHOD FOR CLEANING JET HEAD

摘要

PROBLEM TO BE SOLVED: To provide a liquid jet apparatus which can surely remove a liquid increased in the viscosity in the vicinity of a nozzle opening. SOLUTION: A nozzle face 13 is sealed by a cap member 44 is a state with an ink liquid stored in a sealing hollow part 45. After the nozzle face 13 is sealed, a high frequency driving signal having the higher frequency than a driving frequency for jetting the ink liquid to a recording paper is supplied to drive piezoelectric vibrators 35, thereby generating cavitation to the ink liquid. Stiff and highly viscous ink or solidified ink generated to the nozzle opening 29 is broken or separated by bubbles generated by the cavitation. Then, the ink is removed from the nozzle by carrying out a suction operation.