Appeal No. 2005-0235 6
Application No. 09/969,291
of, for example, a polyimide resin, as the insulation for the admittedly known electric
conductor. On this record, we answer this question in the affirmative.
As acknowledged by the appellant (specification, page 4), a polyamideimide
insulation coating was conventionally used in the above-mentioned conventional electric
conductor useful for, inter alia, coils of motors and generators. It was also well known that
the welding heat used to connect this conventional electric conductor with other electric
conductor adversely affects such insulation coating. See the specification, page 4.
Tatematsu, like the appellant, teaches that the above-mentioned polyamideimide
resin coating was known to be used as an insulation layer of an electrical conductor useful
for coils of motors and generators. See column 1, line 4 to column 2, line 6. Tatematsu
teaches that to improve the heat resistance property of the polyamideimide insulation
coating, the polyamideimide resin is modified with, e.g., trialkylamine. See column 2, lines
10-17. However, due to lack of certain desired mechanical properties in this modified
polyamideimide resin coating insulation, Tatetmatsu teaches employing a plurality of
insulation layers containing both polyamideimide resin and polyimide resin (aromatic
polyimide) layers on a conventional electric conductor to improve the mechanical and heat
shock resistance properties of the insulation coating. See column 2, lines 48-58. These
insulation properties are further enhanced upon employing a multi-layer insulation coating
made of modified polyamideimide resin and polyimide resin layers as an insulation coating
for an electrical conductor. See column 2, line 58 to column 3, line 57.
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