Appeal No. 1997-4287
Application No. 08/275,864
The subject matter on appeal relates to a process for dry
spinning filaments which contain potentially superconducting
material. The process comprises extruding a solution of
polymer and a suspension of potentially superconducting powder
particles from a spinneret as bicomponent filaments wherein,
prior to the extruding, the suspension is forced through a
hyperbolic spinning capillary thereby mechanically aligning
particles of the potentially superconducting powder along an
axis of electrical conduction. Further details of this
appealed subject matter are set forth in representative
independent claim 1 which reads as follows:
1. A process for dry spinning filaments which contain
potentially superconducting material, the process comprising:
preparing a suspension of potentially superconducting
powder, particles of which have a length to diameter ratio
above 1, in a thickened solvent;
preparing a solution of fiber-forming polymer;
supplying the suspension and the solution to a spinning
apparatus;
in the spinning apparatus, arranging the solution and the
suspension in a bicomponent arrangement;
extruding the arranged solution and suspension from a
spinneret as bicomponent filaments;
in the spinning apparatus and prior to said extruding,
forcing the suspension through a hyperbolic spinning capillary
2
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