GB1447934A - Friction twist-imparting devices - Google Patents

Abstract

1447934 Texturising yarns; false-twisters DIDIER ENG GmbH 14 June 1974 [15 June 1973] 26581/74 Headings DID and D1F A friction (false-) twist imparting device comprises an axially rotatable disc provided on at least one face with a coaxial, axially projecting bead which frictionally engages, to rotate and twist, a -running filament or filamentary bundle. The device shown in Figs. 2 and 3 comprises three discs 70, 71 72 carried on a common shaft 79 and formed with beads 73 and 74, 75 and 76, 77 and 78 through annular gaps between which a filament 58 or 58' is guided to be engaged by the beads at two points; alternatively a filament 80 may contact only a single disc at two positions on the same bead; plied filaments I and 2 may be separated at 8 by device 4. In the direct and continuous texturing operation represented by Fig. 1, as applied to four "yarns" (1, 2, 1' 2') filaments travelling from spinnerets (not shown) pass through separating guideways 30; preparing section 31, wherein moisture and, optionally, an anti-static fluid is applied; thence, in a drawing system, through a first roller 32 and pressure roller 33. a heater 34 and a second draw roller 35 and pressure roller 36; through a texturing section including separating guideways 3 also acting as twist stops (to prevent run-back of twist) twisting section 37, a second heater 38 to set (at least partially) the twist in the filaments imparted by twisters 39; separating and untwisting devices 4; drawing system comprising rollers 40, 41 and 44, 45, if necessary (i.e. if bulked but non- or low-stretch filaments are required); a third heater 42 and/or preparation station 43; drawing rollers 46; thence to wind-up 47.