Coating processes – Spray coating utilizing flame or plasma heat – Organic containing coating
Reexamination Certificate
2005-09-13
2005-09-13
Parker, Fred J. (Department: 1762)
Coating processes
Spray coating utilizing flame or plasma heat
Organic containing coating
C427S185000, C427S202000, C427S203000, C427S379000, C427S421100
Reexamination Certificate
active
06942900
ABSTRACT:
A process for producing insulations for electrical conductors by powder coating, which results in aging which is improved compared to glass-mica or casting-resin insulation, and a powder which is suitable for such a process. The powder is applied a number of times in succession, in the form of individual layers which follow one another, until a layer thickness of ≦10 mm is reached, and each of the individual layers undergoes intermediate heat curing before the next individual layer is applied. The intermediate curing of each individual layer uses a curing time which corresponds to 2-10 times the gel time of the powder used. Finally, the entire insulation undergoes final curing. The result of an electrical life test carried out on various specimens insulated with epoxy-resin powder which contains fine filler.
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International Search Report for PCT Patent Application No. PCT/CH00/00683, mailed on Aug. 28, 2001.
Baumann Thomas
Nienburg Johann
Oesterheld Jörg
Sopka Jörg
ALSTOM Technology Ltd.
Cermak Adam J.
Cermak & Kenealy LLP
Parker Fred J.
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