Detecting fixer in hardcopy apparatus

Details Detecting fixer in hardcopy apparatus Detecting fixer in hardcopy apparatus

2006-05-30

2006-05-30

Nguyen, Thinh (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S098000

Reexamination Certificate

active

07052102

ABSTRACT:
Fixer is detected on a print media22by applying a predetermined pattern200, FIG.3, of fixer to the media, and over or under-printing it with a fill of coloured ink, and then optically detecting the predetermined pattern. For example, magenta ink may be applied over the fixer pattern on a glossy media, areas with both fixer and ink having a detectable increase in optical density compared to areas with ink alone. The pattern is scanned and the image information is used to check fixer nozzle functionality and fixer printhead alignment.

REFERENCES:
patent: 4907013 (1990-03-01), Hubbard et al.
patent: 5980016 (1999-11-01), Nelson et al.
patent: 6312082 (2001-11-01), Lund et al.
patent: 6378976 (2002-04-01), Byers et al.
patent: 6572213 (2003-06-01), Valero
patent: 6637853 (2003-10-01), Ahne et al.
patent: 6655797 (2003-12-01), Smith et al.
patent: 2001/0038399 (2001-11-01), Lund et al.

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