Patent ID: 7645007
Filing Date: 2010-01-12
Classification: B41J

Abstract:
1. A nozzle inspection method of an ink jet recording apparatus that performs printing on a print medium by using a print head having a plurality of nozzles, comprising: a nozzle inspection step of sequentially generating pressure on a print recording liquid in individual nozzles with a predetermined potential difference generated between a print recording liquid receiving area that can receive print receiving liquid ejected from each nozzle and print recording liquid in the print head to eject the print recording liquid as ink droplets where the ink droplets ejected from each nozzle land on the print recording liquid receiving area after being detached from each nozzle, and on the basis of electrical change, which occurs with ejection of the ink droplets, at the print head carrying out a nozzle inspection so as to confirm whether or not the print recording liquid can be ejected from each nozzle; wherein said nozzle inspection step comprises an electrical change detecting step detecting electrical change in the print recording liquid in the print head using a detection device provided on a board on the print head, or on a board on a carriage for moving the print head.