Method of determining useful life of cartridge for an ink jet pr

Details Method of determining useful life of cartridge for an ink jet pr Method of determining useful life of cartridge for an ink jet pr

1988-12-02

1991-11-26

Herndon, Heather R.

Recorders

Record receiver deforming

346140R, G06F 1520

Patent

active

050688065

ABSTRACT:
A computer program in the microcontroller of an ink jet printer-plotter counts the ink dots fired by the cartridge of the printer. The host system keeps the dot count in nonvolatile memory. When the number of dots corresponding to the nominal capacity of the cartridge has been fired, a message is printed by the printer reminding the operator to provide a fresh cartridge.

REFERENCES:
patent: 4202267 (1980-05-01), Heinzl et al.
patent: 4639738 (1987-01-01), Young et al.
patent: 4788861 (1988-12-01), Lichti
patent: 4963927 (1990-10-01), Ishihara
Hewlett Packard Journal, May 1985, Thermal Ink-Jet Printhead, pp.2-40.
Hewlett Packard Thermal Ink-Print Cartridge Designer's Guide, Second Edition.

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