Chapter 2
2-32
f) Ink supply valve
The ink supply valve is located between the ink tank and ink tube to prevent ink leakage from occurring when the ink tube on the ink tank side is opened during
replacement of the ink tank.
The ink supply valve is opened and closed by the valve open/close mechanism which is driven by the valve motor.
The ink tank unit consists of two tank bases each of which contains ink tanks for three colors and the ink tubes for six colors.
The ink tubes coming from the C, PC, PM and GY ink tanks feed both printheads L and R. Two valve open/closed detection sensors and valve motor control the
opening and closing of the ink supply valves to prevent the ink tubes to whichever printhead that is not engaged in any operation, such as ink filling and suction,
from being released.
T-2-3
F-2-23
Valve open/closed detection sensor 1 Valve open/closed detection sensor 2 Printhead L Printhead R
OFF ON Open/Close Open/Close
OFF OFF Close Close
ON ON Open Open
Valve cam
Valve motor
Ink supply valve (driven simultaneously)
Valve open/closed detection sensor 1
Linkage
Linkage
Valve open/closed detection sensor 2
Ink supply valve
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