Apparatus for applying liquid to a running yarn in a textile machine comprises a hollow body providing a manifold for the liquid and an elongate tube extending horizontally across the manifold. The tube is retained in a bore in the body by a yarn guide which is detachably secured to the body and the bore in the tube communicates with a groove yarn path provided by the yarn guide via a bore in the yarn guide of larger diameter than the bore in the tube. The constant supply of liquid to the yarn i...

A process for producing worsted-spun yarn by a drawing process including two stages of drawing wherein the last drawing step includes autolevelling and the roving is fed from the last drawing step to a ring-spinning operation.

A process for controlling the relative viscosity of synthetic yarns during production thereof. At least three pressure measurements are taken at three spaced locations in a transfer line for carrying molten polymer to a spinneret. Temperature and throughput of polymer in said transfer line are measured. An estimated relative viscosity of yarn produced by employing a predetermined correlation between pressure drop, throughput, temperature and relative viscosity is then calculated. A meaningful op...

Apparatus for ultrasonically welding together two threadlines under a controlled pressure. The two ends of the threadlines are overlapped in a groove formed along an anvil and a resiliently biased plunger compresses the two ends into the groove. Vibrations transmitted through the anvil weld the two ends together. Pressure is controlled by tensioning springs which stiffen when the vibrations are applied and hence provide the equivalent of a heavy backing mass.

A method and apparatus for winding yarns in a package comprises displacing a traverse guide of a yarn to be traversed and moved leftward and rightward along an axial direction of a winding package, in a direction toward and away from the winding package together with the traverse movement.

A fabric which has the durability characteristics of vinyl while possessing soft characteristics provided by a fabric having alternating vinyl and soft fabrics yarns in the warp direction and alternating vinyl and soft fabric yarns in the filling direction.

Modifying a polyester with tetraethyl silicate or like oxysilicon chain-brancher to provide a draw-texturing feed yarn that can be draw-textured at a speed of at least 500 mpm without excessive filament breaks, and with other advantages in the resulting textured yarns, such as improved bulk and dyeability over unmodified polyester yarns textured under similar conditions, and preferably without sacrificing dye uniformity.

A method for the manufacture of a crimped synthetic yarn which comprises introducing two crimps, separately, into a yarn, a latent crimp being introduced into the yarn by heating the yarn asymmetrically while under tension, and a direct crimp being introduced into the yarn by subjecting the yarn to a direct crimping treatment. Also an apparatus for carrying out this method and the yarn obtained by the method are disclosed.

A metal yarn structure wherein the filaments are set under pressure while in a substantially nonelastic state to be free of residual torsion while having a preselected helical twist. The setting of the filaments in the helical configuration is effected by twisting the filaments in a matrix while concurrently effecting constriction thereof to fluidize the filaments and permit the setting thereof upon release of the constriction forces in the torsion-free helical configuration.

A high density bulked yarn having a bulk density of less than 0.050 g/cm.sup.3 is formed by stitching a matt comprised of bulkable synthetic continuous filaments to form a plurality of aligned seams by cutting the matt between the seams to form individual yarns and subsequently bulking the synthetic filaments locked in the seams by contacting the yarns with a heated fluid. Upon being bulked, the synthetic filaments curl to cover the seam.