US PATENT SUBCLASS 28 / 273
.~.~.~.~ Flow restrictor type, e.g., venturi, etc.

Current as of: June, 1999
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28 /   HD   TEXTILES: MANUFACTURING

217  DF  THREAD FINISHING {4}
219  DF  .~ Surface modification of running length {5}
247  DF  .~.~ Texturing, e.g., crimping {10}
271  DF  .~.~.~ Fluid jet {3}
273.~.~.~.~ Flow restrictor type, e.g., venturi, etc.

DEFINITION

Classification: 28/273

(under subclass 271) Method or apparatus wherein the turbulence is induced by passing the thread and fluid through an inhibiting orifice connecting a converging entrance passageway with a diverging exit passageway or connecting a high pressure zone with a low pressure, thread bulking or expansion zone usually within the fluid jet.