GB698132A - Improvements in the continuous manufacture of artificial thread - Google Patents

Abstract

698,132. Drying thread. KULJIAN, H. A. April 30, 1951, No. 10116/51. Class 34 (i) [Also in Group IX] A thread advancing and storing reel on which thread 20 is dried in a section Z has elongated rolls R1-R8 arranged about a hollow central post 21 extending between axially aligned end plates 14, 17, the rolls being individually rotatable to advance the thread in helical windings, and the central post 21 has slots 22 and carries a heat exchanger having tubes 26 with fins 28 supplied with steam for heating air blown through the post 21 and out of the slots 22 to dry the thread in the section Z. The axes of the shafts of the rolls R1-R8 are skewed relative to the central axis so as to cause the thread to advance helically. Steam under pressure is delivered to tubes 26 from a pipe 23 into a passage 36 in header 38 communicating with pipe 40 within the tubes 26 the outer ends of which tubes communicate with a return passage 42 leading through passage 44 to return pipe 24 for removing exhaust steam and condensate. To control the flow of drying air horizontal baffles 46 are secured at their outer ends to header 38 and their inner ends a vertical baffle 48 and taper from their outer to their inner ends to produce an oppositely tapered space 52 so that air flows out through these openings and decreases in volume from left to right to give a larger volume of heated air flowing against the saturated thread as it enters the drying zone.