Linear encoder for digital printing applications

Details Linear encoder for digital printing applications Linear encoder for digital printing applications

1991-01-03

1993-02-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

051840111

ABSTRACT:
The invention comprises a sensor system in a printhead scanner which is capable of achieving accurate pixel to pixel registration. A plastic film strip with alternating fiducial bars and spaces is scanned. A voltage pattern is triggered by the zero slope points of the voltage induced by a sensing mechanism being moved along the plastic film strip.

REFERENCES:
patent: 4247214 (1981-01-01), Swan, Jr.
patent: 4533268 (1985-08-01), Sanders, Jr.
patent: 4673810 (1987-06-01), Babsch et al.
patent: 5047631 (1991-08-01), Frese
patent: 5066130 (1991-11-01), Tsukiji et al.

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