Patent ID: 9498971
Filing Date: 2016-11-22
CPC Classification: B41J

Claim Text:
1. An inkjet printing device, comprising: an inkjet head that includes a nozzle for ejecting ink; a first tank that stores ink to be supplied to the inkjet head; a second tank that receives ink not consumed in the inkjet head; a circulation path for circulating ink among the first tank, the inkjet head, and the second tank; an ink liquid feeder that feeds ink from the second tank to the first tank; an ink replenisher that replenishes ink in the second tank; a purging unit that performs purging of supplying ink from the first tank to the inkjet head to discharge ink from the nozzle; and a controller that controls the purging unit to perform the purging, and controls an ink liquid feeding operation performed by the ink liquid feeder from the second tank to the first tank, and an ink replenishing operation performed by the ink replenisher according to a liquid level in each of the first tank and the second tank so that, during the purging, the liquid level in each of the first tank and the second tank is maintained at a reference level.