US PATENT SUBCLASS 57 / 97
.~.~.~ Drawing rollers

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

1 R  DF  APPARATUS AND PROCESSES {45}
92  DF  .~ Driving {6}
93  DF  .~.~ Speed adjusting {3}
97.~.~.~ Drawing rollers

DEFINITION

Classification: 57/97

(under subclass 93) Driving devices having means to vary the speed of one or more pairs of drawing rollers to control the twist and keep it uniform.