Patent ID: 6146566
Filing Date: 2000-11-14
Classification: D01D

Abstract:
In a process for the spinning of polyamides, the improvement comprising transporting vapor through at least one round spinning nozzle casing to an exhaust device that is positioned under at least one round spinning nozzle contained within the casing, wherein the casing has an upper portion and a lower portion and the vapor is injected tangentially into the upper portion of said spinning nozzle casing and is conducted downward through at least one helical groove toward the lower portion of the casing, and wherein the groove is arranged along the exterior of the applicable spinning nozzle unit and the vapor at the lower portion of the spinning nozzle unit is conducted against a circular, horizontally positioned groove having an inner edge, wherein the vapor experiences a change in the direction of flow inward, over the inner edge of the circular, horizontally positioned groove toward the spinning nozzle via a first annular passage and is horizontally suctioned off at the spinning nozzle through a second annular passage by the exhaust device.