Patent ID: 7798601

Claim:
An ink jet printing apparatus, comprising: printing means for ejecting ink onto a print area of a print medium, and for ejecting ink into a receiving portion provided at a position adjacent to the print area; and ejection control means for scanning the printing means in a scanning direction orthogonal to a direction in which a print medium is conveyed, while controlling election of ink from the printing means onto the print area and into the ink receiving portion, wherein the printing means has a first ink ejecting portion and a second ink ejecting portion, which are sequentially disposed along the scanning direction, the first ink ejecting portion ejects ink which is re-dispersable, and that accumulates more easily than ink ejected from the second ink ejecting portion, the second ink ejecting portion ejecting ink which re-disperses components of ink ejected from the first ejecting portion, the ejection control means allows the ink ejected from the first ink ejecting portion and the ink ejected from the second ink ejecting portion to land on the ink receiving portion in an overlapping manner, and is able to change a landing position where the inks ejected from both the first and second ink ejecting portions land on the ink receiving portion in an overlapping manner, and the ejection control means changes the landing position of the easily accumulating ink in the ink receiving portion when an amount of the easily accumulating ink in the ink receiving portion reaches a preset threshold which is larger than an amount of one droplet of ink, and allows the easily accumulating ink to sequentially accumulate beginning at a position nearest to the print area in the ink receiving portion until the amount of the easily accumulating ink reaches the preset threshold.