Patent ID: 7448714
Filing Date: 2008-11-11
Classification: B41J

Abstract:
1. An ink jet printer comprising: an ink jet head for discharging ink; a recovery device for executing a recovery action to recover an ink discharging ability of the inkjet head; a first timer for measuring time since a last recovery action of the recovery device; and a controller for setting an interval, the interval being selected from a plurality of predetermined intervals, between recovery actions based on a printing history of the ink jet printer, and for controlling the recovery device to execute the recovery action when the time measured by the first timer becomes equal to the set interval; a first counter for counting a number of media printed since the last recovery action, and a second counter for counting a number of droplets of the ink discharged from the ink jet head since the last recovery action, wherein the controller calculates a printing rate by dividing the number of droplets of the ink by the number of printed media, and the controller sets the interval based on the printing rate.