BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a schematic view showing a configuration example of an essential portion of an ink-jet printer according to the present invention;
FIG. 2A is a schematic view showing a connection state between a buffer tank and an ink cartridge;
FIG. 2B is an enlarged schematic view showing an operation state of a valve member when the ink cartridge is attached to an attaching unit;
FIG. 3 is a longitudinal sectional view showing a configuration example of the buffer tank and a maintenance unit;
FIG. 4 is a circuit block diagram showing a configuration of a control system of the ink-jet printer;
FIG. 5A is a schematic view showing the state before the ink cartridge is attached to explain the procedure of a method for attaching the ink cartridge;
FIG. 5B is a schematic view showing the state a new ink cartridge 2 is attached to explain the procedure of the method for attaching the ink cartridge;
FIG. 5C is a schematic view showing the state the exhaust valve of the buffer tank is opened to explain the procedure of the method for attaching the ink cartridge;
FIG. 6 is a flowchart showing a control procedure by a CPU when the ink cartridge is attached; and
FIG. 7 is a flowchart showing a method for attaching another ink cartridge according to this embodiment.