Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1992-12-10
1994-06-07
Reinhart, Mark J.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
346160, 355202, H04N 121, B41J 2435
Patent
active
053195370
ABSTRACT:
A Raster Output Scanner (ROS) color printer is formed by providing several ROS imagers adjacent image exposure locations of a photoreceptor belt. Each ROS imager forms a separate color image in response to video input signals with each color image superimposed in registration over the previously formed images. Registration in the process direction is enabled by a quad cell photosensor whose output is continually compared to determine whether process registration deviations from a previously established position are necessary. Correction signals are generated in an iterative fashion until a preselected process registration position is re-established. The quad cell detector is also used for a second function; to produce the start and end of scan signals which enable image registration in the cross-process direction.
REFERENCES:
patent: 4386272 (1983-05-01), Check, Jr. et al.
patent: 4611901 (1986-09-01), Kohyama et al.
patent: 4791452 (1988-12-01), Kasai et al.
patent: 4833503 (1989-05-01), Snelling
patent: 5208796 (1993-05-01), Wong et al.
Hubble, III Fred F.
Martin James P.
Ossman Kenneth R.
Powers Edward A.
Reinhart Mark J.
Xerox Corporation
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