Patent GB-384997-A (GB)
Title: Improvements in or relating to the manufacture and winding of artificial yarns or threads
IPC: B65H54/42
Filed: 1931-06-12
Abstract: 384,997. Winding artificial. yarns during production.. BRITISH CELANESE, Ltd., 22, Hanover Square, London, TAYLOR, W. I. and KINSELLA, E. c/o British Celanese, Spondon, near Derby. June 12, 1931, Nos. 17109, 20287, and 32912. [Class 120 (ii).] Artificial yarns are wound in the form of cross-wound cylindrical or frusto-conical pack ages continuously with their production by means of an endless rotating guide slot, the packages being driven by cylindrical or, especially for conical packages, conical drums. The slot may be formed in the driving-drum or in a separate rotatable member, and, although generally helical, may be adjusted as to pitch, for example, to ensure proper reversal of the yarn, and the traverse in each direction may be at different speeds. A separate feed roller may be dispensed with, the rate of winding thus determining the rate of production of the yarn ; if a feed roller is used, the winding- speed may be adjusted to somewhat less than the feed roller speed, the consequent slack winding in conjunction with the open nature of the wind preventing straining of the yarn by providing for any contraction which may take place on the package due to evaporation of residual solvent. A lubricant, water soluble or other size, or water may be applied to the yarn as it passes to the winding-apparatus to give coherence to the package and to prevent the separation of individual filaments from the yarn ; suitable sizes are gelantin, waxes and like adhesives, and if the yarns are of material subject to electrification they may be impregnated with, for example, olive oil or polyhydric alcohols incompletely esterified with higher fatty acids such as glycol mono-oleate. Water insoluble sizes may be used, such as those described in Specifications 244,947, [Class 2 (ii), Cellulose &c.], 346,267, [Group IV], and 352,451, or drying oils such as linseed, poppy, or wood oil preferably boiled or blown or mixed with siccatives, and the removal thereof may be delayed until the dyeing of the fabrics containing the threads is completed. If such delay in removal of the size is not required, albumen, starch, dextrin, gums or resins may be employed, or the water-soluble cellulose esters or ethers described in Specification 344,775 and 344,528, [both in Group IV], or polymerized vinyl compounds containing free hydroxy or carboxylic acid groups as described in Specification 346,267, [Group IV]. The sizing material may be applied in any suitable form, such as aqueous or other solutions or dispersions, or solutions in oil or other solvents, or by any suitable means such as wicks, discs, or rollers. The residual solvent, or a proportion thereof, may be removed by treating the materials with steam, preferably after leaving the spinning-cell in the case of dry-spinning. The steam may be applied at intervals along the path of the filaments. As shown in Fig. 2, yarns from a dry-spinning cell 11 are conditioned by wicks 16 and are fed by rollers 15 to traverse drums 18 which drive the packages 19. The drums may be of steel or artificial resin and their surfaces may be roughened, for example by etching or sandblasting, and may be provided with two helical grooves 37, 38, Fig. 3, of opposite hand to give a slower traverse, and with a starting slot, Fig. 4 (not shown). Waste collected on the rollers 15 when starting up is slipped on to rollers 24. A spring 33 engaging a slot 35 maintains the package spindle 27 in the operative position, as shown, or in alignment with its supporting arm 25 for doffing. The traverse drum 18, Fig. 5, may be independent of the winding-drum 42 so that a slower traverse may be obtained without the use of a double helical groove, or the package may rest freely on both drums. Each drum may be driven by band or gear from a counter shaft, or all the drums may be mounted on a single shaft, and two or more drums may be formed from a single unbroken surface, particularly when it is desired to switch a thread from one driving drum to another when a package is fully wound. The drums may be disposed in two rows which may be arranged at an angle to the length of the machine, the packages 47, 48, Fig. 8, in each row being carried by cradles 60 pivoted on the shafts of adjacent driving- drums. According to the first two Provisional Specifications means may be provided for controlling the pressure between the package and the driving-drum, and for automatically removing the package from the driving-drum upon breakage of the yarn or upon completion of winding.