Image forming apparatus which outputs a test pattern to determin

Details Image forming apparatus which outputs a test pattern to determin Image forming apparatus which outputs a test pattern to determin

1995-03-29

1998-02-17

Bost, Dwayne

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

395112, 395113, 358504, G06K 1500

Patent

active

057200114

ABSTRACT:
Binary and multi-value test patterns respectively generated by a test pattern generation circuit and a multi-value pattern generation circuit, which are independent from each other, are printed, and the presence/absence of an abnormality of an image forming apparatus, and the source of the abnormality, i.e., the engine side or the controller side, are categorized on the basis of the print states of the patterns.

REFERENCES:
patent: 4710785 (1987-12-01), Mills
patent: 5065234 (1991-11-01), Hung et al.
patent: 5345315 (1994-09-01), Shalit
patent: 5485283 (1996-01-01), Kaneko
patent: 5522017 (1996-05-01), Ueda

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