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DETAILED SECTION DESCRIPTIONS
PRINTER
2.2.3. Printer Head
1. Mechanism
[C]
[D]
[E]
[F]
Ink from the sponge is filtered at [A] to remove dust, and then passes to the noz-
zles through pipe [B]. When the head drive current flows through a nozzle's
heater plate [C], the ink at the plate boils. The bubbles formed [D] eventually join
into one large bubble [E]. The bubble forces a drop of ink [F] out of the nozzle.
Head drive current stops before the bubble is fully formed. The remaining
heat of the heat plate completes the bubble. The plate cools by the time the
ink drop is ejected, and fresh ink enters the nozzle from the sponge.
The nozzles are arranged in a
straight line at intervals of 1/360
inch.
There are 128 nozzles in the
black ink cartridge.
The color ink cartridge has a
total of 136 nozzles: 24 yellow
nozzles, 24 magenta nozzles, 24
cyan nozzles, and 64 black noz-
zles.
[B]
Nozzle 1
Nozzle 128
Black Ink Cartridge
2-6
November 28th, 1995
[A]
H505D508.wmf
Nozzle 1
Nozzle 136
Color Ink Cartridge
H505D509.wmf
Yellow 1~24
Magenta 25~48
Cyan 49~72
Black 73~136
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