Patent ID: 6270180
Filing Date: 2001-08-07
Classification: B41J

Abstract:
An ink printer, comprising:a printing head having an ink chamber to store an ink, a piezoelectric device arranged to apply pressure onto the ink chambers and a nozzle tip to jet ink drops;drive signal generating means for generating drive signals corresponding to image information, wherein the piezoelectric device applies pressure onto the ink chamber in response to the drive signals so that ink drops are jetted through the nozzle tip onto an image recording medium and an image corresponding to the image information is recorded on the image recording medium;a temperature measuring device which measures the temperature of the printing head; andheating signal generating means for generating a heating signal on the basis of the temperature of the printing head measured by the temperature measuring device, wherein the piezoelectric device vibrates in response to the heating signal and generates heat so that the ink in the ink chamber is heated; andwherein the heating signal is an oscillating signal having an amplitude and a frequency and wherein the heating signal generating means regulates the amplitude of the heating signal in accordance with the temperature of the printing head measured by the temperature measuring device.