Appeal No. 1998-1916 Page 8
Application No. 08/406,392
In contrast, the insulator bodies of Clabburn are formed
as an integrally molded sheaths that are shrinkage fitted on
an insulating core rod. The reference describes the formation
as follows.
A hollow structure for use as an electrical
insulator or other similar structure having
outwardly disposed flanges extending
circumferentially hereabout. The hollow structure
includes a hollow member of heat recoverable
material positionable about a central insulator
core, electrical conduit, fuse or other substrate.
The outwardly extending flanges are integrally
formed with the hollow member and extend radially
therefrom in the dimensionally heat stable state.
The hollow member is designed to be expanded to a
heat recoverable state for later facile positioning
about an appropriate substrate. The hollow member
may then be heat recovered about the substrate to
become securely positioned thereon.
Abs., ll. 1-13. There are no discrete weathersheds in
Clabburn that would require the end weathersheds to be thicker
in order to withstand compressive forces applied thereto in
order to assemble the weathersheds on the core rod, as in the
case of Kalb.
Because there is no evidence that the Kalb's end
weathersheds would have been desirable in Clabburn's
integrally molded sheaths, we are not persuaded that teachings
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