Patent ID: 7556338
Filing Date: 2009-07-07
Classification: B41J

Abstract:
1. A jetting timing determining method for determining jetting timings at which a liquid is jetted from a liquid droplet head having a plurality of nozzles including a first nozzle and a second nozzle which are to jet liquid droplets concurrently, the method comprising: a jetting step for jetting a first liquid droplet from the first nozzle a plurality of times at a respective plurality of first timings, and jetting a corresponding second liquid droplet from the second nozzle a plurality of times at a respective plurality of second timings, each of the second timings being shifted from each of the corresponding first timings by a respective one of a plurality of predetermined periods of time; a measuring step for measuring a plurality of first jetting speeds at which the first liquid droplets are jetted from the first nozzle and a plurality of second jetting speeds at which the second liquid droplets are jetted from the second nozzle in the jetting step; and a first determining step for determining a delay time between a third timing of a third liquid droplet being jetted from the first nozzle and a fourth timing of a fourth liquid droplet being ejected from the second nozzle, based on the measured plurality of first and second jetting speeds.