The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2001
Filed:
Sep. 25, 2000
Roger W. Budnik, Rochester, NY (US);
James M. Pacer, Webster, NY (US);
Scott L. Kauffman, Rochester, NY (US);
Richard M. Maier, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
In a xerographic development system wherein toner is conveyed from a donor member to a charge receptor by a development field having a DC bias and an AC component, reflectivities of a first test patch having a first target halftone density and a second test patch having a second target halftone density are measured, resulting in first and second possible errors. If the first error and the second error have the same sign, i.e., both patches are too light or too dark, the errors are substantially cured by altering the DC bias. If the first error and the second error have different signs, i.e. one patch is too dark and the other too light, a different correction strategy is employed.