US PATENT SUBCLASS 57 / 400
.~ Open end spinning


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

1 R  DF  APPARATUS AND PROCESSES {45}
400.~ Open end spinning {4}
401  DF  .~.~> Friction
402  DF  .~.~> Electrostatic
403  DF  .~.~> Fluid
404  DF  .~.~> Rotating chamber type {4}


DEFINITION

Classification: 57/400

Open end spinning:

(under subclass 1) Subject matter wherein a strand is rotated about its axis while the free end or "tail" thereof is in contact with, or in proximity to, a source of supply of loose, discrete fibers or fiberlike material which is thus twisted into the strand.

(1) Note. This operation is also commonly referred to as free end spinning or break spinning and requires the use of a seed yarn to engage the supply of loose fibers in order to initiate the operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5, for covering or wrapping operations in which discrete fibers are helically wrapped about a core strand.

263, for piecing up open-end machines.

301, for clearing open-end machines.