US PATENT SUBCLASS 57 / 317
.~.~ Variable draft

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

1 R  DF  APPARATUS AND PROCESSES {45}
315  DF  .~ With drafting {5}
317.~.~ Variable draft {1}
318  DF  .~.~.~> False twist type

DEFINITION

Classification: 57/317

Variable draft:

(under subclass 315) Subject matter wherein the drafting operation includes cyclical or random variations or fluctuations.

(1) Note. Such devices may function by changing the relative linear speeds of feed and delivery means, by changing the distance between drawing and holding means, or by imparting an intermittent or transitory motion to the work strand by means additional to the normal drafting means.

SEE OR SEARCH CLASS

19, Textiles: Fiber Preparation,

237+, for variable drafting means, per se.