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:
Oct. 20, 1998
Filed:
Sep. 30, 1996
Applicant:
Inventors:
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
399 72 ; 347900 ;
Abstract
A method and apparatus for reproducing high quality images using an electrophotographic printing machine is disclosed. More specifically, the present invention is used to change the location, shape and size of a process control patch. Process control patches may be used to improve the quality of an image prior to printing. The intensity of light reflected from the control patch is measured, and the measurements are used to change parameters such as magnitude of electrostatic charge, and toner concentration, before the latent image developed. Adjusting these parameters at this time will allow the printing apparatus to reproduce images having superior quality than previously available.