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:
Aug. 02, 1988
Filed:
Nov. 10, 1986
Joan R Ewing, Fairport, NY (US);
Joseph A Swift, Ontario, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A contact brush charging device together with a method for charging an insulating layer are provided wherein the charging brush comprises a plurality of resiliently, flexible thin fibers having an electrical resistivity of from about 10.sup.2 ohms-cm to about 10.sup.6 ohms-cm and being substantially resistivity stable to changes in relative humidity and temperature. In a preferred embodiment the plurality of fibers are arranged in a uniform distribution of fibers along the length of the brush and comprise partially carbonized polyacrylonitrile fibers having an electrical resistivity from about 10.sup.3 ohms-cm to about 10.sup.5 ohms-cm and being substantially homogeneous in composition.