Patent ID: 6830309
Filing Date: 2004-12-14
Classification: B41J

Abstract:
A method for correcting an ink discharge amount of an ink jet recording head, the ink jet recording head comprising a plurality of ink flow paths to which ink is supplied externally, a plurality of energy generating elements provided in the respective ink flow paths and adapted to generate energy utilized for discharging the ink, and a plurality of discharge ports that are used for recording and that communicate with the respective ink flow paths, the discharge ports being formed by patterning, said method comprising:a step of providing the ink jet recording head with a dummy discharge port having a dummy discharge opening that has a circular shape and a cross-sectional area greater than that of discharge openings of the plurality of discharge ports, the dummy discharge port not being used for recording, and the plurality of discharge ports and the dummy discharge port being formed in the same step; a measuring step for measuring the cross-sectional area of the dummy discharge opening; a step of writing discharge amount information, which is determined in relation to the measured cross-sectional area of the dummy discharge opening, in a memory mounted to the ink jet recording head; and a step of varying an ink discharge amount to be discharged from the discharge ports used for recording, as needed, on the basis of the discharge amount information written in the memory mounted to the ink jet recording head.