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US 5,394,223 AGranted
Apparatus for image registration
AssigneeXerox Corporation
InventorsSteven C. Hart, Fred F. Hubble, III, Thomas J. Hammond, Jeffrey J. Folkins, James P. Martin
Life of this patent
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Abstract
An apparatus for positional tracking a moving photoconductive belt and adjusting an imager in an electrophotographic printing machine to correct for alignment errors when forming a composite image. Registration errors are sensed by developing an appropriate set of target marks, detecting the target marks, and controlling the position of the imager.
Claims7
A printing device having an imageable surface adapted to move along a preselected path, wherein the improvement includes:
- a first image processing station adapted to record a first latent image and a target latent image on the imageable surface;
- means for developing at least the target latent image on the imageable surface to form a developed target image;
- a second image processing station adapted to record a second latent image on the imageable surface, said second image processing station illuminating the developed target image to form an illuminated image;
- means for sensing an intensity of the illuminated image to indicate deviations of the imageable surface from the preselected path;
- and
- means, responsive to said sensing means, for adjusting said image processing station to compensate for deviations of the imageable surface from the preselected path.
3 more elements
Dependencies are inferred from the claim text.