Process for the intensive aftertreatment of synthetic threads

Claim 1

IN A METHOD OF INTENSIVELY TREATING FRESHLY SPUN SYNTHETIC THREADS ACCORDING TO THE WET SPINNING PROCESS IN WHICH A SPINNING SOLUTION IS EXTRUDED THROUGH A SPINNERET INTO A COAGULATING BATH TO FORM A THREAD CONSISTING OF A PLURALITY OF UNTWISTED FILAMENTS AND IN WHICH THE THERAD IS AFTER TREATED AND COLLECTED, THE STEP WHICH COMPRISES PROPELLING THE THREAD IN AN UPWARD DIRECTION IN A SUBSTANTIALLY VERTICAL PATH BETWEEN TWO WIDELY SPACED GUIDING POINTS WHILE UNDER A TENSION INSUFFICIENT TO EFFECT A STRETCHING THEREOF, AND IN THE UPPER PORTION OF THE THREAD PATH DURING ITS ASCENDING PASSAGE BETWEEN SAID POINTS INITIALLY GUIDING A JET OF AFTER TREATING LIQUID INTO CONTACT WITH THE THREAD AND FOR A RELATIVELY SMALL PORTION OF THE THREAD PATH IN COUNTERCURRENT RELATION TO THE DIRECTION OF THE THREAD TRAVEL WHILE AVOIDING ANY OTHER CONTACT OF THE THREAD BETWEEN THE GUIDING POINTS WHEREBY A SHEATH OF TREATING LIQUID ENVELOPES THE THREAD AT THE POINT OF CONTACT AND MOVES DOWNWARDLY ALONG THE THREAD DURING THE MAJOR PORTIONS OF ITS TRAVEL IN THE PATH AND PENETRATES THE INDIVIDUAL FILAMENTS.