Abstract: High speed spinning of high dpf non-round polyester filaments by extruding molten polymer through adjacent orifices spaced such that the extruded streams merge prior to solidification.

Abstract: Spun yarn having torqueless latent crimp is draw-textured, producing a drawn textured yarn which is substantially torque-free.

Abstract: A finish skirt redistributes finish along the surface of the finish roll, providing extra finish to the yarn wound on the second bobbin in tandem winding, compensating for finish blotted off on the bobbin collecting the first yarn.

Abstract: In application of metered finish to a high speed running yarn, a felt plug or other resistance to fluid flow is provided in the finish passageway just prior to the exit.

Abstract: In application of metered finish to a high speed running yarn, the exit portion of the finish passageway is angled such that a positive atmospheric gauge pressure adjacent to the exit of said passageway is maintained.

Abstract: In application of metered finish to a high speed running yarn, a vent is provided in the finish passageway just prior to the exit.

Abstract: A textured melt-spun filament having alternate S-twisted and Z-twisted helical sections connected by twist reversal regions, the filament having a cross-section comprising a spiral wherein the outer portion of the spiral lies at the inside of the helical sections.

Abstract: In application of metered finish to a high speed running yarn, a check valve at the end of the finish passageway prevents entrained air fluctuations from entering the finish passageway.

Abstract: In spinning, the orifice is in the form of a slot meandering back and forth across the interface between two conjugated polymers flowing through the orifice.

Abstract: Nylon 66 yarn having particular stress-strain properties, typically also having a soft, luxuriant hand in fabric form. As compared to conventional nylon 66 with comparable boiling water shrinkage, the novel yarn exhibits a higher modulus at break, a lower modulus at 10% elongation, a positive stress index, and excellent denier uniformity. The process involves subjecting the yarn, within 0.016 to 0.11 seconds after solidification of the filaments, to a tension of 0.2 and 1.5 grams per final denier and heating the yarn to a temperature between 50.degree. and 250.degree. C. long enough to reduce yarn retraction below 1%.

Abstract: In a chuck with two O-rings for engaging a bobbin, the bobbin being positioned on the chuck clears the outboard O-ring but compressingly engages the inboard O-ring. Movement of the inboard O-ring is used to expand the outboard O-ring into contact with the bobbin.

Abstract: A textured melt-spun filament having alternate S-twisted and Z-twisted helical sections connected by twist reversal regions, the filament having a cross-section comprising a spiral wherein the outer portion of the spiral lies at the inside of the helical sections.

Abstract: Polyester yarn is spun at a sufficiently high speed to produce substantial stress-induced crystallinity and low shrinkage. The resulting feed yarn is textured, yielding a textured yarn which dyes considerably deeper than conventional polyester yarns.

Abstract: Polyamide yarn is melt spun at high speed and drawn almost immediately (between 0.002 and 0.25 seconds) after solidification. Turbine driven feed roll replaces conventional feed and separator roll. Process displays unusually low drawing tension, exceptionally uniform yarn.

Abstract: Yarn comprising filaments of high and low elongations is false-twist heat-set. The yarn tension upon passage through the false twisting device is increased to a level sufficient to break the low elongation filaments, giving a yarn with a spun-like hand.

Abstract: A garment including a leg (hose) portion, having increased uniformity of compressive force over a wider range of flexing. The hose is knitted conventionally from a bicomponent yarn, one component being an acid-dyeable hard fiber and the other component being a particular type of elastomeric polyurethane resistant to acid dyes.

Abstract: Nylon 66 yarn having particular stress-strain properties, typically also having a soft, luxuriant hand in fabric form. As compared to conventional nylon 66 with comparable boiling water shrinkage, the novel yarn exhibits a higher modulus at break, a lower modulus at 10% elongation, a positive stress index, and excellent denier uniformity. The process involves subjecting the yarn, within 0.016 to 0.11 seconds after solidification of the filaments, to a tension of 0.2 and 1.5 grams per final denier and heating the yarn to a temperature between 50.degree. and 250.degree. C. long enough to reduce yarn retraction below 1%.

Abstract: A drawn conjugate yarn of an elastomer and a non-elastomer is wound on a bobbin with a crushable surface. Yarn can be knit from the resulting package successfully after long storage periods.

Abstract: In an open-end spinning process wherein staple fibers are continuously fed to an air vortex and wherein a yarn tail extends into the vortex whereby the fibers affix themselves to and lengthen the tail, the yarn tail is driven at a faster revolution rate than the tail would be driven by the vortex alone by means of a rotary driven member.

Abstract: A new and useful process of substituting one core for another in a wound package of textile yarn is provided. In preparation for subsequent liquid treatment of yarn wound on a substantially non-perforate rigid cylindrical core by substituting therefor a liquid-permeable longitudinally resilient cylindrical core of about the same or slightly smaller diameter, the package of yarn is first axially compressed. Then, the rigid core is pushed internally from the package while the resilient core substantially at the same time is pulled from a position external of the package to a position internal of the package to replace the rigid core with the resilient core. The application of the axial compression during core transfer prevents or minimizes rumpling of the yarns forming the outer portion of the package. The process is particularly suitable for preparing a package of false twist crimped polyester continuous multi-filament yarn for package dyeing.