Patent ID: 8430502

Claim:
A printing device configured to operate selectively in one of a single-sided printing mode for printing on one side of a sheet and a double-sided printing mode for printing on both sides of a sheet, the printing device comprising: a printing unit configured to eject ink; a convey roller; a discharge tray; and a controller, wherein when the printing device operates in the double-sided printing mode, the controller is configured to: calculate a drying time of a front-side image for a front side of a sheet, determine whether the calculated drying time exceeds a predetermined threshold value, when the controller determines that the calculated drying time does not exceed the predetermined threshold value, control the printing unit to wait until after the calculated drying time elapses to print a back-side image on a back side of the sheet after the printing unit prints the front-side image on the front side of the sheet; when the controller determines that the calculated drying time exceeds the predetermined threshold value, control the convey roller to discharge the sheet having the front-side image printed on the first side thereof onto the discharge tray after the printing unit prints the front-side image on the front side of the sheet without waiting for the calculated drying time to elapse, and when the controller determines that the calculated drying time exceeds the predetermined threshold value, control the printing unit to print the back-side image on a next sheet.