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:
Apr. 09, 2002
Filed:
Oct. 16, 2000
Dennis A. Abramsohn, Pittsford, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Xerographic printers may be provided with a photoreceptor belt manufactured so that transparent permanent optical registration marks are formed in defined selected minor areas of the belt without physically weakening the belt, as is the case with belt holes. These permanent registration marks are sufficiently transparent for a conventional belt holes sensor to optically detect them by illumination through those transparent areas of the photoreceptor. The photoreceptor is preferably a plural layer organic photoreceptor with an internal optically opaque metallic ground plane layer, and the optical registration marks are formed by oxidizing defined areas thereof. This may be accomplished by the simultaneous selective application of illumination to these selected minor areas of the photoreceptor, while adjacent areas of the photoreceptor are not illuminated, plus the application of electrical current from a voltage source applied through the belt in those areas.