Specifications

REV.-A
2.1.1 Printhead Mechanism
The printhead of this printer employs the on-demand method, where part of the ink stored in the reservoir
within the printhead is supplied into the nozzle each time ink in the nozzle chamber is injected.
Figure 2-2 shows the internal structure of the
printhead. The functions of the major components are
explained below.
● Head damper
When the carriage moves, the ink tube also moves, which results in the change of pressure within the
tube. The head damper is used to absorb this change of pressure and prevent the ink from rushing into
the reservoir.
● Reservoir
The ink supplied into the
printhead is once stored in the reservoir.
O Nozzle
The ink stored in the reservoir is injected through nozzles. The structure of a
nozzle is shown in Figure ‘~~~
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2-3.
Reserver
Piezoelectric Element
Ink Inflow Gate
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I
/;
I
I
II
1 \-,/’
I
I
I
;
—
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— —— —.-
1
\
\
-Damper
\
‘ Filter
Nozzle
Figure 2-2. Internal Structure of Printhead
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‘ozzem
/
Diaphragm
T
Piezoelectric
Element
\
Pressure
Chamber
Figure 2-3. Structure of a Nozzle
2-2