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. 18, 2001
Filed:
Sep. 22, 2000
William H. Hollenbaugh, Jr., Rochester, NY (US);
Timothy L. Lincoln, Rochester, NY (US);
Roger N. Ciccarelli, Rochester, NY (US);
Thomas R. Pickering, Webster, NY (US);
Dwight J. Tshudy, Webster, NY (US);
Robin L. Sheppard, Canandaigua, NY (US);
Amy L. Stamp, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Detection of the presence and amount of an external surface additive such as silica upon the surface of a toner is accomplished by treating the external surface additive with a fluorescent material and exposing the toner to ultraviolet light. This permits accurate quality control over the amount of the external surface additive required for the toner. The toner thus includes a binder resin and a colorant, and at least one external surface additive upon the surface of the toner, wherein the at least one external surface additive contains a fluorescent material. The fluorescent material may be a fluorescein dye.