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:
Jul. 09, 2002
Filed:
Sep. 25, 2000
Scott M. Silence, Fairport, NY (US);
Edward J. Gutman, Webster, NY (US);
James M. Proper, Webster, NY (US);
Frank O. Reitze, Rochester, NY (US);
Brian S. Giannetto, Rochester, NY (US);
Brian E. Moore, Ontario, NY (US);
Joo T. Chung, Webster, NY (US);
James G. Stenzel, Rochester, NY (US);
Jeffrey L. DeBarr, Williamson, NY (US);
Morris M. DeYoung, Jr., Farmington, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A toner of toner particles containing at least one binder, at least one color ant, and an external additive package comprised of zinc stearate and at. least one of silicon dioxide or titanium dioxide, wherein the amount of zinc stearate is limited to about 0.10 percent by weight or less of the toner. It has been surprisingly found that when the amount of zinc stearate is so limited, a developer formed from the toner exhibits excellent triboelectric charging and stability and excellent developer flow. When the developer is used in a magnetic brush development system, consistent, high quality copy images are formed substantially without any depletion defects over time.