Patent ID: 9033471
Filing Date: 2015-05-19
Classification: B41J

Abstract:
1. An ink jet printing apparatus comprising: a printing unit configured to eject ink; a first measuring unit configured to measure a temperature of a first part of the printing unit; a first heating unit configured to heat the first part of the printing unit, a second measuring unit configured to measure a temperature of a second part of the printing unit, which is at different position in the printing unit from a position of the first part of the printing unit, a second heating unit configured to heat the second part of the printing unit; a heating control unit configured to control the heating by each of the first and second heating units, before ejecting ink for printing by the printing unit, such that each of the first and second heating units (i) performs heating in a case that the temperature of each of the first and second parts of the printing unit measured by the first and second measuring units, respectively, is lower than a reference temperature, and (ii) stops heating in a case that the temperature of each of the first and second parts of the printing unit measured by the first and second measuring units, respectively, is equal to or higher than the reference temperature, respectively; a memorizing unit configured to memorize first information indicating that the temperature of the first part of the printing unit once reached the reference temperature when the first measuring unit initially detects the temperature of the first part of the printing unit being equal to or higher than the reference temperature before ejecting ink for printing by the printing unit, and second information indicating that the temperature of the second part of the printing unit once reached the reference temperature when the second measuring unit initially detects the temperature of the second part of the printing unit being equal to or higher than the reference temperature before ejecting ink for printing by the printing unit; and an ejecting control unit configured to control ejecting of ink from the printing unit such that the printing unit starts ejecting ink according to both of the first and second information memorized in the memorizing unit.