Patent ID: 9061516
Filing Date: 2015-06-23
Classification: B41J

Abstract:
1. An inkjet printer comprising: a first inkjet head configured to eject an ink having a first viscosity onto a print medium; a second inkjet head configured to eject an ink having a second viscosity different from the first viscosity onto the print medium; a first ink tank in communication with the first inkjet head and configured to store the ink having the first viscosity; a second ink tank in communication with the second inkjet head and configured to store the ink having the second viscosity; a first ink air chamber in communication with an air layer in the first ink tank; a second ink air chamber in communication with an air layer in the second ink tank; a communicating pipe through which the first ink air chamber and the second ink air chamber communicate with each other; a first on-off valve provided in the communicating pipe and configured to open or close communication between the first ink air chamber and the second ink air chamber; an atmosphere open pipe connected to the second ink air chamber and opened to the atmosphere; a second on-off valve provided in the atmosphere open pipe and configured to open or close communication between the second ink air chamber and the atmosphere; a pressure adjuster configured to adjust a pressure in the second ink air chamber without intervention of the first ink air chamber; and a controller configured to control the first on-off valve, the second on-off valve, and the pressure adjuster, and configured to drive the pressure adjuster to increase the pressure in the second ink air chamber with the first on-off valve and the second on-off valve being closed.