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:
Mar. 19, 2002
Filed:
Apr. 28, 2000
Cary Patterson Ravitz, Lexington, KY (US);
Thomas George Twardeck, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A method and apparatus provides for minimizing visual artifacts resulting from laser scan process direction position errors in an electrophotographic machine. The electrophotographic machine has a process direction, and includes a photoconductive member having an image forming surface having defined thereon a plurality of pixel locations which form a pixel grid, and wherein two adjacent pixels in the process direction are separated by a pixel spacing distance. A printhead unit has a first laser beam generator and a second laser beam generator, wherein the first laser beam generator generates a first laser beam which impinges the surface at a first location and the second laser beam generator generates a second laser beam which impinges the surface at a second location. The second location is spaced apart from the first location in the process direction by a separation distance equal to an integer multiple of the pixel spacing distance plus a distance less than the pixel spacing distance.