Patent GB-754704-A (GB)
Title: Improvements in and relating to apparatus for the treatment of thread
Inventor: GIVENS JOHN HARRISON
IPC: D01D10/04
Filed: 1954-01-06
Abstract: <PICT:0754704/IV(a)/1> <PICT:0754704/IV(a)/2> Artificial silk threads are treated with liquids whilst they are advancing along a series of rollers arranged in endwise stepped formation with the axis of each roller at an angle to the next roller, so that each pair of adjacent rollers forms a thread-advancing device, and each roller other than the end rollers forms part of two thread-advancing devices.  The apparatus is suitable for effecting the various after-treatments of freshly spun viscose, but may also be applied to the treatment of previously formed artificial threads or of natural threads. When used continously with the production of viscose, several series of rollers may be placed side by side to form a spinning machine, and the machine may be made two-sided by placing two banks of rollers back to back.  As shown in Fig. 1, viscose thread from the spinneret 6 passes over driven godet 8, then round a series of driven rollers 11-19 whose axes are all horizontal but are progressively canted.  Thus threads wound round rollers 14b and 15a, Fig. 2, advance along the rollers and whilst advancing are treated with liquid from pipe 33, excess liquid being caught in tray 34 and recovered.  The threads then pass over separating flange 31, and advance along rollers 15b, 16a whilst being subject to another liquid treatment from pipe 43, and so on.  The flange may be replaced by other liquid-separating devices such as a polythene band as described in Specification 645,171.  The final thread-advancing pair of rollers 18b, 19 may be used for drying the threads by means of steam circulated in hollow roller 19 and supplied through concentric pipes 36, 37, a hood 35 being fitted round the drying rollers.  The drying rollers may be tapered to allow for shrinkage.  As shown, all the rollers are driven by bevel gears from a common driving shaft 24 powered by electric motor 30, but they may be driven from a common shaft through universal joints, or each roller may be separately driven.  In the case of viscose, successive treatments on the rollers may include dilute acid, warm water wash, an aqueous desulphurizing solution, water wash, bleaching solution, water wash and oil emulsion. Specifications 474,973, [Group IV], and 719,718 also are referred to.ALSO:Threads are treated with liquids whilst they are advancing along a series of rollers arranged in endwise stepped formation with the axis of each roller at an angle to the next roller, so that each pair of adjacent rollers forms a thread-advan <PICT:0754704/IV(c)/1> <PICT:0754704/IV(c)/2> cing device, and each roller other than the end rollers forms part of two threadadvancing devices.  As shown in Fig. 1, viscose thread from the spinneret 6 passes over driven godet 8, then round a series of driven rollers 11-19 whose axes are all horizontal but are progressively canted.  Thus threads wound round rollers 14b and 15a, Fig. 2, advance along the rollers and whilst advancing are treated with a liquid from pipe 33, excess liquid being caught in tray 34 and recovered.  The threads then pass over separating flanges 31, and advance along rollers 15b.  16a whilst being subject to another liquid treatment from pipe 43, and so on. The flange may be replaced by other liquid-separating devices such as a polythene band as described in Specification 645,171 [Group IV(a)]. The final threadadvancing pair of rollers 18b, 19 may be used for drying the threads by means of steam circulated in hollow roller 19 and supplied through concentric pipes 36, 37, a hood 35 being fitted round the drying rollers.  The drying rollers may be tapered to allow for shrinkage.  As shown all the rollers are driven by bevel gears from a common driving shaft 24 powered by electric motor 30, but they may be driven from a common shaft through universal joints, or each roller may be separately driven. Specifications 474,973 [Group IV] and 719,718 [Group IV(a)] also are referred to.