Raster output scanner with improved process direction registrati

Details Raster output scanner with improved process direction registrati Raster output scanner with improved process direction registrati

1992-09-18

1993-11-23

Reinhart, Mark J.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

H04N 121

Patent

active

052648729

ABSTRACT:
A single pass, polygon ROS system provides a plurality of latent images which may subsequently be developed in different colors. The ROS units are initially aligned so that each color image is precisely registered at the same relative position along the exposed area of a photoreceptor belt. The alignment is accomplished by detecting the entrance of the leading edge of an image frame into an image scan exposure area, detecting the instant location of the scanning beam along the surface of the particular polygon facet and either printing the first image information line with the next start of scan detection signal or the second image information line, depending upon whether the scanning beam is after or before the midpoint of the facet, respectively.

REFERENCES:
patent: 4611901 (1986-09-01), Kohyama et al.
patent: 4660059 (1987-04-01), O'Brien
patent: 5204620 (1993-04-01), Costanza et al.
patent: 5208796 (1993-05-01), Wong et al.

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