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Chapter 2
2-19
2.3.2.2 Ink Tank Unit
2.3.2.2.1 Structure of Ink Tank Unit
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a) Ink tanks
Each color-specific ink tank is filled with 130 mL of ink (90 mL for the starter ink tanks bundled with the
printer). The ink level in each ink tank is memorized in EEPROM attached to the tank and is detected as a dot
count on the basis of the EEPROM information.
When an electrode attached to a hollow needle detects no continuity, it displays a message reporting that the ink
tank is nearly empty. If the dot count reaches a predesigned value in this state, an ink out condition is assumed.
b) Ink port
Depressing the ink tank fixer lever on the printer would cause would cause a hollow needle to pierce the ink port
sealed by a rubber plug, linking the ink passage of the ink tank to the printer.
c) Air passage
Depressing the ink tank fixer lever on the printer would cause an open hollow needle to pierce the air passage
sealed by a rubber plug, releasing the internal pressure of the ink tank to keep it constant.
d) Notches for preventing incorrect installation
Ink tanks are furnished with a notch for preventing incorrect installation. If the installation of an ink tank in
incorrect position is attempted, the notch would interfere with it, preventing its installation.
The ink tank fixer lever won't lower without the ink tank fully inserted to reach the mounting position, so the
ink cannot be supplied.
e) Agitating plate
Assists in the agitation of pigment inks during ink agitation carried out to prevent their settlement.