Yarn treating apparatus

Claim 1

YARN TREATING APPARATUS COMPRISING A HOLLOW CYLINDRICAL BODY, AN ORIFICE BLOCK CLOSEING ONE END OF THE BODY INCLUDING A CONICAL ORIFICE THROAT AND A CYLINDRICAL EXIT CONDUIT WITH THE AXES ALONG THE CYLINDRICAL AXIS OF THE BODY, A YARN NEEDLE POSITIONED IN AND CONCENTRIC WITH THE BODY HAVING A LONGITUDINAL YARN PASSAGEWAY OF SMALLER DIAMETER THAN THE EXIT CONDUIT ALIGNED WITH THE AXIS OF THE EXIT CONDUIT, THE NEEDLE HAVING A CAP PORTION CLOSING THE END OF THE BODY OPPOSITE THE ORIFICE BLOCK TO FORM A CHAMBER SURROUNDING THE NEEDLE, THE NEEDLE HAVING A TIP IN THE FORM OF AN CONICAL SECTION THE APEX ANGLE OF WHICH IS FROM 45* TO 135*, SAID CONICAL ORIFICE THROAT HAVING A PRECISELY MATCHING ANGLE AND A LENGTH FROM 2 TO 6 TIMES THE LENGTH OF THE CORRESPONDING CONICAL SECTION OF THE NEEDLE, THE CONICAL NEEDLE TIP BEING COMPLETELY SPACED FROM THE ORIFICE THROAT TO PROVIDE A YARN TREATING ZONE BETWEEN THE TIP OF THE NEEDLE AND THE EXIT CONDUIT AND TO PROVIDE AN ANNULAR PASSAGEWAY AROUND THE NEEDLE TIP FROM THE CHAMBER TO THE TREATING ZONE, AND AN INLET CONDUIT FOR INTRODUCING AIR INTO SAID CHAMBER FROM OUTSIDE THE BODY.