US PATENT SUBCLASS 57 / 401
.~.~ Friction

Current as of: June, 1999
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57 /   HD   TEXTILES: SPINNING, TWISTING, AND TWINING

1 R  DF  APPARATUS AND PROCESSES {45}
400  DF  .~ Open end spinning {4}
401.~.~ Friction

DEFINITION

Classification: 57/401

Friction:

(under subclass 400) Subject matter wherein the rotation of the strand about its axis is caused by a frictional force or effort applied substantially tangentially to the periphery of the strand.

SEE OR SEARCH THIS CLASS, SUBCLASS:

331, for friction type false twisters combined with drafting means.

334+, for friction type false twisters, per se.