Abstract: A method of treating polycarbonamide fiber, such as nylon 6 yarn for carpets, has been discovered to increase dye fastness when the dyed fiber is exposed to ozone. The method is coating the fibers with a tertiary amine, or a substituted piperidine, morpholine, or piperazine compound. The compound must contain at least one moiety of straight or branched chain alkyl, alkenyl or aralkyl containing 6 to 24 carbon atoms.

Abstract: The method and apparatus of this invention comprises an improvement over the prior art wherein the splicing of two yarns is done in a zone entirely smooth-surfaced and non-resilient on any interior surface which can contact the yarns. This improved method and apparatus surprisingly was found effective for yarns which had been very difficult to splice with the old method and apparatus.

Abstract: This high speed yarn take-up system consists of a pneumatic injector nozzle rotatably mounted off-center of a single flighted rotating screw. Yarn is injected into the area exposed at the trailing edge of the screw and compressed and moved forward in a compression chamber by the feeding of the screw. A plastic tube is continuously formed around the compression chamber to receive the yarn mass as it discharges, thus forming a tube of indefinite unlimited length and from 1/4 to 4 inches or larger in diameter. The tube may contain a single end or multiple ends of yarn. The yarn can be removed from the tube at high speeds by simply slitting the plastic as the yarn is pulled from the package.

Abstract: In an essentially horizontal totally enclosed cylindrical wiped-wall polymer reactor having an essentially horizontal polymer flow, a pool of polymer in its lower portion, and driven wheels to create high surface area in the polymer to facilitate evaporation of volatiles from the polymer, the improvement comprising a freewheeling drag wheel driven by the driven wheels, with a wiping means mounted on the driven wheels and actuated by the drag wheel to wipe the entire internal circumference of the cylindrical reactor. The drag wheel generates a force to urge the wiping means outward against the internal circumference of the reactor. The force is generated by the drag of the pool of polymer on the drag wheel. This keeps the wall of the reactor wiped with a fresh film of polymer. The process and apparatus is particularly adaptable to driven wheels and drag wheels eccentrically mounted in the reactor.

Abstract: The transfer tail apparatus of this invention comprises a tail forming string-up aid, a tail cutter, and tail storage mechanism. The method is to form the tail as the yarn is traveling from a supply source around a spool of the spring-loaded string-up aid to an aspirator which has an internal tail cutter. After the winder has started, and the rotating bobbin flange, which has a pin attached underneath and near the outer edge, reaches the desired speed, the spring-loaded string-up aid is manually released. The string-up aid springs upward to bring the yarn being aspirated to a position where the rotating bobbin pin engages the yarn. At this point, the yarn in the aspirator is reversed in direction and tension is applied to the yarn across the internal cutter which cuts the yarn. The string-up aid and tail cutter are located so that when the yarn has been cut and the direction is reversed, the yarn is directed into a tail storage slot underneath the bobbin flange.

Abstract: When from about 0.4% to about 5% of tertiary amines ##EQU1## WHERE R is an alkyl radical of 8-25 carbon atoms, R' is an alkylene radical of 2 to 10 carbon atoms, R" and R"' are hydrogen, a phenyl, or an alkyl radical of 1 to 3 carbons, but where R" and R"' are not both hydrogen, and x, y, and z are each at least 1 (x+y) is not greater than 6, preferably 2, and (x+y+z) is not greater than 9, preferably 3, are coated on nylon fiber, or are added to the dyebath, improved dyefastness is achieved compared to an untreated dyed nylon fiber when this fiber is exposed to ozone.

Abstract: A spin finish composition for nylon feeder yarn to be processed at high temperature into carpet yarn, such as by steam jet texturing, comprising tridecyl stearate with a specific emulsifier and an antistatic agent results in improved processing and better quality yarn, and yarn packages.

Abstract: Before the ram is released, the end flaps of the bale wrap are wrapped around the loose bale wires and pinned in such a manner that the wire wrapped is bowed. When the ram is released, the end flaps are drawn extremely tight against the bale by the now taut but formerly bowed wire. This eliminates the need for sewing or other fastening.

Abstract: A printing device to identify wound yarn packages being automatically doffed from a winder. The device has a stamp with a marking end to be inked by an ink pad and is spring-loaded to strike and retract from a package for marking. A triangular shaped cam slot is used for cocking and releasing the stamp responsive to pressure contact of the device with a yarn package.

Abstract: In stuffer box crimping of yarn, yarn is forced into a crimping chamber to form a wad and discharged with a discharge control being varied in response to sensing the position of the wad at the exit of the crimping chamber. The improvement of this invention comprises sensing the position of the yarn wad in the crimping chamber by issuing at least one jet of a fluid aligned to issue across the exit of crimping chamber and receiving the jet in an enlarged orifice communicating with a pressure sensor controller so the yarn wad unfolding point is sensed by interrupting the jet of fluid to thereby regulate the discharge controller with the pressure sensor controller.

Abstract: The prior art apparatus to wind vertically running yarn was a vertical spindle with a pulley mounted on a driven shaft, a stationary yarn wheel guide, an upper vertically movable yarn guide wheel, a lower vertically movable yarn guide wheel, a double track cam vertically mounted with a driven pulley and shaft, an upper cam follower and shoe, a lower cam follower and shoe, cam housing having a vertical slot, a motor having both a spindle drive pulley and a cam drive pulley mounted on a drive shaft, a belt to drive the spindle from the motor and a belt to drive the cam from the motor. The motor would drive the vertical spindle and the cam by the connection of the driven pulleys to the motor drive pulleys with belts. The vertically movable yarn guide wheels were connected to their respective cam followers and the cam followers were both driven by this one double track cam to oscillate vertically in the cam housing slot.

Abstract: Control of polycaproamide degradation during vacuum polycondensation in a polymer finisher is achieved by maintaining a partial pressure of water above the polymer melt above about 10 mm. Hg, preferably above about 30 mm. Hg, absolute pressure. Degradation is minimized to within 3, preferably 2 units of the theoretical difference between carboxyl and amine ends. The water extractables content of the polymer is also controlled to below about 3.5% by weight, preferably 2.5%; viscosity increase of the polymer melt levels out after less than 4 hours to less than 10 FAV units per hour, by means of the invention.