Patent ID: 6746095
Filing Date: 2004-06-08
Classification: B41J

Abstract:
An ink jet recording device comprising:a head formed with a plurality of nozzles through which ink droplets are selectively ejected based on ejection data during actual printing; electrodes that generate a charging electric field for charging the ink droplets ejected from the head and a deflector electric field for deflecting the ink droplets charged by the charging electric field, the electrodes being provided common to the plurality of nozzles; first detecting means for detecting whether all of selected nozzles through which ink droplets are ejected based on the ejection data are normal or at least one of the selected nozzles is defective; identifying means for automatically identifying, without performing test-pattern printing while the actual printing is not being performed, a defective nozzle while the head is continuously performing the actual printing based on the ejection data when the first detecting means detects that the ejection is performed defectively.