Lexmark 7000 Color Jetprinter Course Information page 51

Print Process
Print Cartridges
Service Training
As the vapor bubble expands, it generates a pressure
wave, or shock wave, which forces a droplet of ink out
of the nozzle.
The machine logic sends signals to the appropriate
nozzles and the required character prints.
The printer logic keeps tract of the maximum number of
nozzle fires that can occur before running out of ink.
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