Process and apparatus for wet spinning slub yarn

Claim 1

IN A PROCESS FOR PRODUCING CONTINUOUS FILAMENT YARN BY EXTRUDING FILAMENT-FORMING SOLUTION THROUGH SPINNERET ORIFICES AND INTO A COAGULATING LIQUID FLOWING THROUGH A TUBE TO FORM SEPARATED FILAMENTS, FLOWING THE COAGULATING LIQUID THROUGH THE TUBE AT SUFFICIENT LIQUID VELOCITY TO TRANSPORT THE FILAMENTS THROUGH THE TUBE AND COMPLETING COAGULATION OF THE FILAMENTS DURING PASSAGE THROUGH THE TUBE TO FORM FILAMENTS WHICH DO NOT STICK TOGETHER, CONVERGING THE NON-ADHERENT COAGULATED FILAMENTS FROM THE TUBE WITHIN A BATH TO FORM A YARN AND WITHDRAWING THE YARN FROM THE BATH, THE IMPROVEMENT OF INTERMITTENTLY BULKING THE YARN TO FORM BUNCHES OF NON-ADHERED, ENTANGLED FILAMENTS WHICH COMPRISES DISCHARGING THE NONADHERENT COAGULATED FILAMENTS INTO SAID BATH, FROM SAID TUBE, DIRECTLY AGAINST A BAFFLE TO BULK THE YARN AND WITHDRAWING THE YARN FROM THE BATH AT A RATE PROVIDING A RATIO OF YARN SPEED TO SAID LIQUID VELOCITY OF BETWEEN 0.50 AND 1.30, SAID RATIO BEING 15% TO 50% LESS THAN THE CORRESPONDING RATIO WHEN THE YARN IS WITHDRAWN FROM THE BATH WITHOUT BULKING AGAINST THE BAFFLE, TO FORM TIGHT BUNCHES OF AT LEAST 2.5 TIMES THE DENIER OF THE UNBULKED YARN AND OF A LENGTH FROM 1/8 INCH TO 4 INCHES SPACED AT INTERVALS BETWEEN BUNCHES OF 0.5 INCH TO 20 INCHES, SAID BUNCHES CONSISTING OF NON-ADHERED FILAMENTS WHICH ARE INDIVIDUALLY LOOPED UPON THEMSELVES AND UPON EACH OTHER AT INTERVALS ALONG THEIR LENGTHS INTO AN ENTANGLED MASS OF RING-LIKE LOOPS, WHORLS AND COILS THAT ARE NOT READILY PULLED APART.