Patent ID: 8757745
Filing Date: 2014-06-24
Classification: B41J

Abstract:
1. A printing apparatus comprising: a print head having pigment ejection openings for ejecting a pigment ink and dye ejection openings for ejecting a dye ink; a pigment ink tank configured to contain pigment ink to be supplied to the print head; a stir unit configured to perform a stirring operation for stirring pigment ink in the pigment ink tank, wherein ink is not ejected during the stirring operation; a determining unit configured to determine whether the print head ejects pigment ink in a printing operation based on image data to be printed; and a control unit responsive to the determination by the determining unit of whether the print head ejects pigment ink in the printing operation, the control unit being configured to cause the stir unit to perform the stirring operation before the printing operation when the print head ejects pigment ink in the printing operation, and being configured to cause the print head to perform the printing operation without the stirring operation when the print head does not eject pigment ink in the printing operation.