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HP DeskJet 870Cxi Printer
The HP DeskJet 870Cxi is an ink-jet color printer that prints on a wide variety of media
and paper types and sizes, labels, envelopes, transparencies, plain and specialty
papers from 4x6 to 8.5 x 14, plus manual two sided printing at up to 8 pages per minute.
This is a general users guide. For more information see the pdf file located in
\\132.160.42.89\sdal\User Manuals\Printers\ hpDeskJet870cxi.pdf
Thermal Inkjet Technology
Ink-jet technology centers on a disposable print cartridge, which propels ink out of 300
nozzles (192 nozzles on the color print cartridge). The basic principle is to apply heat to
a tiny measure of ink until it expands and is propelled through a nozzle. This is
achieved by first filling a small reservoir, known as the firing chamber with ink. The next
step is to heat the ink with a thin-film resistor layered above the firing chamber. As the
ink heats up, it expands to form a bubble. As the bubble continues to expand and burst,
it is forced through the nozzle located below the firing chamber. This process is
repeated up to 12,000 times per second.
Compiled by: Brent Runnells, UH Hilo EPSCoR-ITER \\ . . .\sdal\How-To\ht_hp870cxi.doc
Last modified 7/13/04
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