Patent ID: 6945623
Filing Date: 2005-09-20
Classification: B41J

Abstract:
1. An inkjet printing apparatus for forming an image using a plurality of printing heads for ejecting ink and a plurality of ink containing sections for containing the ink to be supplied to the printing heads, the plurality of the printing heads and the ink containing sections being used in association with plural types of inks, comprising: means for discharging the ink through an ink ejection opening of the printing heads to stabilize ink ejecting characteristics of the printing heads; means for detecting the degree of use of the ink in the ink containing sections; means for comparing the detected degree of use of the ink with a predetermined value; control means for changing the amount discharged by said discharging means in accordance with the result of the comparison; and means for judging whether there is an ink that is not used to form an image when the image is formed, on the basis of the judgment result by said judging means, said detecting means detects the degree of use of the ink in the ink containing section containing the ink that is not used to form the image to contribute to the comparison with the predetermined value and the process of changing the amount discharged.