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:
Feb. 13, 2007
Filed:
Jun. 25, 2004
Christopher A. Dirubio, Webster, NY (US);
Michael D. Thompson, Rochester, NY (US);
Gerald M. Fletcher, Pittsford, NY (US);
Charles A. Radulski, Macedon, NY (US);
Christopher A. DiRubio, Webster, NY (US);
Michael D. Thompson, Rochester, NY (US);
Gerald M. Fletcher, Pittsford, NY (US);
Charles A. Radulski, Macedon, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Electrodes are embedded in a biased charge roller of a xerographic device. The electrodes, which may run the length of the roller, are deposited on an insulating substrate. A semi-conductive conformable layer of a flexible elastomer covers the electrodes. The semi-conductive conformable layer limits current flow between electrodes and relaxes charge deposited on the roller surface. Stationary pre-nip and post-nip contacts apply the bias to the imbedded electrodes. The electrodes in the post nip region are biased to V. The electrodes positioned in the pre-nip regions are either grounded or biased to V<V. The electroded biased charge roller may generate air breakdown in the post nip region, resulting in highly uniform charging.