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US Patent 7920805 Photoconductor formulation containing boron nitride

Patent 7920805 was granted and assigned to Lexmark International, Inc. on April, 2011 by the United States Patent and Trademark Office.

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Patent
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Patent attributes

Current Assignee
Lexmark International, Inc.
Lexmark International, Inc.
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
79208051
Patent Inventor Names
Weimei Luo1
Mark Thomas Bellino1
Michael George Sloan1
Tanya Yvonne Thames1
Date of Patent
April 5, 2011
1
Patent Application Number
117821381
Date Filed
July 24, 2007
1
Patent Primary Examiner
‌
Hoa V Le
1
Patent abstract

The present disclosure relates to incorporation of boron nitride in the charge transport layer of a photoconductor. The boron nitride may have an aspect ratio of greater than 1.0, a D50 mean particle size of less than about 10.0 μm and be present at about 5.0% (wt) or less in the charge transport layer. The cartridge may also include toner particles wherein the toner particles have a size range of about 1-25 μm and an average degree of circularity of about 0.90-1.0. The photoconductor containing boron nitride when used in an electrophotographic printer may then provide acceptable dark decay and/or photoinduced decay (PID) curves relative to photoconductors that do not contain boron nitride along with improved resistance to toner filming.

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