Apparatus for applying liquid to a running yarn

Claim 1

A false twist yarn crimping machine having a frame, means for mounting a plurality of yarn delivery bobbins to the frame, means for feeding each of said yarns through one of a plurality of false twisting stations disposed in side-by-side relation along the length of said frame, means for winding the yarns received from said false twisting stations onto take-up spools, and means for applying a liquid to each of the yarns upon leaving the false twisting station and prior to being wound onto the take-up spools, the improvement wherein said means for applying a liquid to each of the yarns comprises a shaft rotatably mounted to said frame and extending horizontally along the length thereof, a roller fixedly mounted to said shaft in association with each of said false twisting stations, each roller having a circumferential surface composed of alternating lands and grooves in the circumferential direction, means for rotating said shaft and thus each of said rollers, and so that the linear speed of the advancing yarn is substantially greater than the peripheral speed of said rollers, means for guiding each yarn so as to contact the lands of the associated roller in a generally tangential direction and along a predetermined portion only of the circumferential surface of the associated roller, and means for applying a liquid to the circumferential surface of each roller during rotation thereof, whereby movement of the running yarn along the circumferential surface of the rotating roller results in the liquid being delivered to the yarn with low frictional resistance being imparted to the yarn.