Contact brush charging
US4761709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1986 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Nov 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/06
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.