Patent ID: 8020952
Filing Date: 2011-09-20
Classification: B41J

Abstract:
1. A printing apparatus comprising: a printing unit that prints visual information on a non-recording surface of a recording medium, which is detachably attached and rotatably driven, by discharging ink droplets; and a control unit that controls movement of the printing unit in a radial direction of the rotatably driven recording medium, and that controls a discharge timing of the ink droplets discharged from the printing unit while rotatably driving the recording medium, wherein the printing unit includes a plurality of ink droplet discharge nozzles, arrayed in a line in the radial direction of the recording medium, that discharge ink droplets of different colors by the control of the control unit, and the control unit completes the printing of the visual information by moving the print unit to reciprocate a radius of the rotatably drive recording medium plural times, and the control unit determines a number of times to reciprocate the print unit based on a discharge interval in which the ink droplets are stably discharged from the ink droplet discharge nozzles.