Charging roller with blended ceramic layer
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United States of America Patent
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-
Jan 13, 1998
Grant Date -
N/A
app pub date -
Aug 16, 1996
filing date -
Nov 9, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A charging roller for use in a xerographic copying machine includes a cylindrical roller core, and a ceramic layer formed by plasma spraying a blend of an insulating ceramic material and a semiconductive ceramic material in a ratio which is selected to control an RC circuit time constant of the ceramic layer in response to an applied voltage differential. The ceramic layer is sealed with a solid, low viscosity sealer, such as Carnauba wax, to protect the ceramic layer from moisture penetration.
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Cited Art Landscape
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