Fixer or ink detection in hardcopy apparatus

Details Fixer or ink detection in hardcopy apparatus Fixer or ink detection in hardcopy apparatus

2005-10-25

2005-10-25

Porta, David (Department: 2878)

Radiant energy

Luminophor irradiation

With ultraviolet source

C250S559400

Reexamination Certificate

active

06958482

ABSTRACT:
To check that nozzles of printheads11-15applying fixer or an ink to a print media22are operating correctly, the fixer or ink is applied to selected locations on a fluorescent print media which is then subjected to ultra-violet radiation; the reflectivities at these locations are detected in the visible spectrum and the information is analyzed using appropriate image processing algorithms. In an ink-jet printer, for example, applied fixer may be irradiated with ultra-violet light by a source30and applied inks may be irradiated with visible light, with a common detector in the visible light range being employed.

REFERENCES:
patent: 6028320 (2000-02-01), Uhling

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