Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1995-05-26
1999-06-01
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
399372, 347116, B41J 247, B41J 2385, G01D 1514, G03G 1500
Patent
active
059092351
ABSTRACT:
Disclosed is a color printer including an image bearing member having an imageable surface for movement along a preselected path, at least a first imaging assembly for forming sets of multiple black toner registration marks on different areas of the imageable surface, and for forming second sets of multiple non-black toner registration marks corresponding respectively to black marks in each set of the first sets of black marks so as to create a series of sets of multicolor registration marks. Each of the second sets is formed thus in accordance with a predetermined different condition of image misregistration relative to the corresponding first set of black toner marks. The color printer also includes a light source for producing a wide area beam (WAB) to illuminate each set of the series of sets of multicolor marks, and a wide area beam (WAB) sensor for measuring scattered or diffuse light reflected from each set of the illuminated series of sets of multicolor marks, and for producing an actual light reflectance measurement value from each such illuminated set. The printer further includes a comparing device for determining a degree of actual image misregistration by comparing each of the actual light reflectance measurement values with a stored predetermined registration offset value corresponding to a predetermined condition of image misregistration for each illuminated set of multicolor marks. Mechanisms are included in the printer for adjusting an imaging parameter of an imaging assembly responsively to the determined condition of actual misregistration so as to correct for the determined actual misregistration.
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Gordon Raquel Yvette
Le N.
Nguti Tallam I.
Xerox Corporation
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