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:
Feb. 17, 2009
Filed:
Dec. 21, 2005
Howard Mizes, Pittsford, NY (US);
Peter Paul, Webster, NY (US);
Jack Lestrange, Macedon, NY (US);
Nancy B. Goodman, Webster, NY (US);
R. Enrique Viturro, Rochester, NY (US);
Howard Mizes, Pittsford, NY (US);
Peter Paul, Webster, NY (US);
Jack LeStrange, Macedon, NY (US);
Nancy B. Goodman, Webster, NY (US);
R. Enrique Viturro, Rochester, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
Many xerographic machines have a motor polygon assembly (MPA), which is a rotating polygonal mirror. As the MPA rotates, it reflects a modulated light beam to produce scan lines on a photoreceptor. Inconsistencies in the MPA can cause inconsistencies in the scan lines, and therefore banding in a printed document. Misalignment, improper mounting, improper manufacture, or sources can cause the MPA inconsistencies. The banding is periodic, can be measured and can be compensated for. Although the modulated light beam can be modulated by many sources, further modulation using a compensation source can reduce banding.