Patent ID: 7306330

Claim:
An inkjet printer printing an image on a recording medium which is fed in a first direction, comprising: an inkjet head that is driven to eject ink to a recording medium; a carriage mounting the inkjet head, the carriage being reciprocally movable in a second direction which is perpendicular to the first direction; a movable ink tank that is mounted on the carriage, the movable ink tank having an ink storing chamber having top and bottom inner surfaces, and oppositely positioned inner side surfaces, the movable ink tank having an ink introducing channel and an ink discharging opening, ink supplied through the ink introducing channel being stored in the ink storing chamber, the ink stored in the ink storing chamber being discharged through the ink discharging opening to the inkjet head, wherein the ink storing chamber is oriented length wise in the first direction; at least one wall provided in the ink storing chamber, the at least one wall extending vertically from the inner bottom surface towards the top inner surface along the first direction to divide the ink storing chamber into a plurality of rooms, the at least one wall extending the length of the ink storing chamber along the first direction and contiguous with the oppositely positioned inner side surfaces perpendicular to the first direction, the plurality of rooms communicating with each other at an upper portion thereof which is above an upper end of the at least one wall when in use; wherein one of the plurality of rooms is a first room being provided with the ink introducing channel, and one of the plurality of rooms other than the first room is a second room being provided with the ink discharging opening; and wherein each room of the plurality of rooms other than the first room has a cross-sectional area in the second direction within a predetermined vertical range less than the first room, the predetermined vertical range is the distance from the top end of the at least one wall to the top inner surface of the ink storing chamber.