US PATENT SUBCLASS 57 / 337
.~.~.~ Having a frictional disc

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

1 R  DF  APPARATUS AND PROCESSES {45}
332  DF  .~ False twist device {4}
334  DF  .~.~ Friction type {4}
337.~.~.~ Having a frictional disc {1}
338  DF  .~.~.~.~> On plural axes {1}

DEFINITION

Classification: 57/337

Having a frictional disc:

(under subclass 334) Subject matter wherein the frictional force applied to the yarn strand is created by a surface of a rotating wheellike device which contacts the strand to produce the false twist.

(1) Note. The yarn strand is not intended to go through any aperture which may be in the disc.

(2) Note. The disc of this subclass is generally thin in thickness relative to its diameter.

(3) Note. This subclass includes plural discs.