US PATENT SUBCLASS 264 / 172.15
.~.~.~ Sheath-core


Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

165  DF  FORMING CONTINUOUS OR INDEFINITE LENGTH WORK {8}
171.1  DF  .~ Layered, stratified traversely of length, or multiphase macrostructure containing material (e.g., conjugate, composite, islands-in-sea, core-sheath, etc.) {8}
172.11  DF  .~.~ Producing composite strand, filament, or thread {6}
172.15.~.~.~ Sheath-core


DEFINITION

Classification: 264/172.15

Sheath-core:

Processes under subclass 172.11 wherein the composite strand, filament or thread is produced by forcing different materials through separate openings in a die or spinneret in which one fiber or filament is substantially enclosed in the other (sheath-core type).