Patent GB-520084-A (GB)
Title: Improvements in the production of staple fibre yarns and like products
IPC: D01G1/10
Filed: 1938-10-10
Abstract: 520,084. Forming staple fibre yarns or like products. POOL, W. Oct. 10, 1938, No. 29288. [Class 120 (ii)] A staple fibre yarn or like product is formed by feeding a succession of flat wide groups of separate fibres in the direction of the length of the fibres to the end of a rapidly rotating support that lies transverse to the direction of feed of the fibres with its axis close to the plane in which the groups are fed so that different fibres in each group are taken up at different points on the support by the previously fed fibres and drawn away continuously along the axis of rotation to form the staple fibre yarn &c. by the twisting together of the successive groups of fibres by the rotation of the support which extends axially from the yarn beyond any point at which the fibres meet the support; the yarn produced may be drawn away through a rapidly rotating twist tube so as to effect the rapid rotation of the tail of the yarn which constitutesthe support. As shown, a continuous filament yarn 1 is drawn from a package 2 of the kind formed by the method described in Specification 504,399 and passes through ejectors 11, 15, supplied with compressed air from a header 13 and which loosen and separate the filaments from one another and form them into a flat band which, as it emerges from the nozzle 17, is pressed periodically by deflector rods 21 into engagement with a continuously operating cutter 18 of the hair-clipper type. The ends of the filaments are blown by the stream of air through the nozzle 17 along a diverging channel plate 40 open at the top, the ends of the filaments becoming more separated and at the end of the plate encountering the tail 41 of the yarn 26 being formed, this tail extending beyond any point at which the filament ends meet it so as to provide the rotating support therefor. The ends of the filaments are urged into contact with the tail by a current of air induced by suction through perforations at the end of the plate 40 and the tail of the yarn 26 is rapidly rotated and twisted by a twist tube 25 formed and supported as described in Specification 519,995, and as the free ends of the filaments become entangled with the rapidly rotating tail of the yarn 26, the filaments are cut by the cutter 18 and the cut ends are subjected to a current of air through perforations 60 in the side of the plate 40 and blown sideways through a flat covered passage 65 into a tail pipe 63 connected by a conduit with the suction conduit 46 communicating with the perforations in the end of the plates 40. The staple fibre yarn emerging from the twist tube passes to a winding device 31 ... 34 by which it is formed into a package 35. In a modification the twist tube is replaced by a short needle-like spindle and the rear ends of the cut fibres, instead of the leading ends, may be engaged by the rapidly rotating support. The filaments may be electrified by passage through a gate tension device as described in Specification 504,400 so as to facilitate their separation. Specifications 484,190 and 489,272 also are referred to.