Electricity: electrical systems and devices – Electric charging of objects or materials
Patent
1986-11-10
1988-08-02
Grimley, Arthur T.
Electricity: electrical systems and devices
Electric charging of objects or materials
355 3CH, G03G 1502
Patent
active
047617098
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.
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Ewing Joan R.
Swift Joseph A.
Grimley Arthur T.
Pendegrass J.
Xerox Corporation
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