Composite electrical brush construction
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United States of America Patent
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N/A
Issued Date -
Feb 15, 2007
app pub date -
Feb 13, 2004
filing date -
Feb 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of manufacturing a composite electrical brush (10) comprises forming a brush body part (14) of low resistivity, carbon/graphite/resin material; heat treating the formed body; applying a layer (34) of high resistivity, resin-containing material to a face (22) of the brush body part; and curing the high resistivity layer: preferably the high resistivity layer is a paste, is applied by roll coating, painting, screen printing or transfer printing and can be applied to a surface (28) of the brush body part other than a surface (20, 24) of the press-way direction: the thus-formed composite electrical brush has the high resistivity, graphite/resin layer (34) bonded to the back face (28 ) of the carbon/graphite/resin brush body part (14).
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