Valve Mechanism - FujiFilm Frontier-S DX100 Service Manual

2.1.5 Valve Mechanism

Self-sealing valves work as a sub tank to compensate temporary ink supply shortage to keep
the pressure constant in off-carriage type printers. For off-carriage type printers, some colors
of ink tends to be excessively consumed temporarily, which may sometimes cause dot
missing or similar trouble. Self-sealing valves help to prevent such situations and maintain
the print quality.
When the ink in the Self Sealing Valve is supplied to the print head, the pressure in the
pressure chamber declines and the pressure plate and diaphragm moves the valve rod to the
valve chamber. Then the ink path from the ink tube and the Self Sealing Valve opens and ink
is supplied to the pressure chamber. If the pressure chamber is filled with ink, the valve rod is
moved to the valve chamber and closes the ink path from the ink tube.
DX100 Service Manual
Print Head
Valve
chamber
Ink path
Valve lever is opened
Print Head
Figure 2-9. Valve mechanism
2.1 Printer Mechanism
Diaphragm
Valve rod
Pressure
chamber
Valve lever is closed
Valve rod
36
Pressure
plate
Ink path