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PROBLEM TO BE SOLVED: To solve the problem that an ink tank is vibrated by the movement of a carriage, and that the pressure of ink in an inkjet head is changed by its vibration to generate the density irregularity of printing.SOLUTION: In a pressure damper disposed in an ink supply passage for conn

PROBLEM TO BE SOLVED: To solve the problem that an ink tank is vibrated by the movement of a carriage, and that the pressure of ink in an inkjet head is changed by its vibration to generate the density irregularity of printing.SOLUTION: In a pressure damper disposed in an ink supply passage for connecting the ink jet head to an ink supply means for supplying the ink to its inkjet head, an opening is bored in the chamber of its pressure damper, and the opening communicates with an ink channel along the sidewall of the chamber to be connected to an ink flow outlet installed in the lower part from the opening. A hole communicating with the chamber is installed near the ink flow outlet of the ink channel.

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