Abstract: A textile stuffer box includes a housing having an entrance and an exit, and including cooperating chamber-forming surfaces defining an internal crimping chamber for receiving and accumulating a length of yarn. An adjustable sliding gate defines at least one of the chamber-forming surfaces adjacent the exit of the housing. A set screw releasably locks a position of the gate to selectively enlarge and narrow the exit of the housing, such that selective adjustment of the gate operates to control axial compression of yarn accumulating inside of the crimping chamber.

Abstract: The invention describes a process and an apparatus for the production of highly crimped polymer strips which are suitable for use in artificial turf surfaces, for example for football pitches, hockey pitches, tennis courts or golf courses, and are characterized by a high degree of strength, a large volume and a high elasticity. The texturing of the polymer strips is carried out by means of a stuffer box, wherein the polymer strips are laid on a cooling godet immediately after the stuffer box.

Abstract: The invention relates to a device for the compression crimping of a synthetic multifilament yarn, said device comprising a transport nozzle and a compression chamber. Said transport nozzle comprises a yarn channel by which means a yarn is guided to a compression chamber. Said compression chamber forms a section having a gas-permeable chamber wall, between a yarn inlet and an enmeshment outlet. According to the invention, the gas-permeable chamber wall comprises a friction surface consisting of material which is resistant to wear, on the inner side facing the yarn enmeshment. The constancy of the braking action produced by the friction on the yarn enmeshment can thus be significantly improved.

Abstract: A texturizing apparatus comprising a drive housing having a false twist inlet to allow a plurality of yarns to enter the drive housing, a pair of opposing counter-rotating nip rollers positioned downstream of the false twist inlet, each nip roller having a circumferential drive surface adapted to engage the plurality of yarns and at least one circumferential spacer surface, and means for applying compression to one of the nip rollers to force the at least one circumferential spacer surfaces of the pair of nip rollers toward each other. The drive housing further having a drive outlet positioned downstream of the pair of counter-rotating nip rollers through which the plurality of yarns may exit the drive housing. The texturizing apparatus can also include a stuffer box having at least one movable flapper door and a box inlet positioned proximate the box inlet and of a size to allow the plurality of yarns to enter the interior of the suffer box.

Abstract: A method and apparatus for producing a high-strength and low-shrinkage synthetic flat yarn. After melt spinning, the filaments are combined to a yarn and drawn. Subsequently, the yarn is compressed to form a plug under the influence of heat. This plug is transported over a certain distance, so that the yarn relaxes in a low-tension state and under the influence of the increased temperature. Finally the plug is disentangled under tension to form the flat yarn, which is wound into a package.

Abstract: A device for treatment of an elongated medium with at least two first rotational bodies, which are pivoted around predefined rotational axes, whereby the rotational axes are essentially parallel to one another, with at least two second rotational bodies, which are pivoted around predefined rotational axes, a first treatment chamber, which is arranged in a conveying route of the elongated medium between the two first rotational bodies and the two second rotational bodies, and a second treatment chamber for the elongated medium, which is arranged in the conveying route of the elongated medium after the second two rotational bodies.

Abstract: A method of bulking and heat-setting a moving, continuous length of twisted thermoplastic yarn. The method includes the steps of saturating the yarn with a dielectric fluid contained in a fluid saturation station. The yarn is then moved downstream from the saturation station to an electromagnetic heating chamber for heating the yarn using electromagnetic radiation. Simultaneously in the heating chamber, the yarn is bulked to add size and texture and the twist permanently heat-set. The twisted and bulked yarn is then collected in a collection station located downstream of the heating chamber.

Abstract: A process for treating a ply-twisted crimped multifilament yarn. The process involves adjusting the temperature and moisture content of the yarn prior to passing the yarn through a stuffer box which is essentially free of steam. Excess hot fluid is removed from the yarn, and the yarn's temperature is adjusted to a temperature in the range of about 40.degree. to 90.degree. C. before the yarn is passed through the stuffer box. The yarns may be used for making a textured saxony-type carpets having a tightly tailored surface texture.

Abstract: An apparatus and process for providing crosslinked fibers or tows with non-symmetrical crimps. The process requires preheating precursor fibers or tows so as to soften the fibers prior to passing the fibers or tows through a horizontal stuffer crimper box to impart a crimp. The crimped fiber is then passed through a heating zone without stress or tension whereby the fibers or tows are carbonized.

Abstract: A layered yarn package is formed of continuous filament yarn wads wherein the yarn alternates between compacted an extended lengths by axially compacting the yarn into a length, segmenting the length into alternating extended and compacted lengths then arranging the compacted lengths in a common axial direction one next to the other to form a layer. The layer may be compressed. One or more layers may form the package.

Abstract: Satisfactory crimps are formed in high tensile modulus filaments having a tensile modulus of elasticity of 5,000 kg/mm.sup.2 or more by mixing the high tensile modulus filaments with additional filaments having a tensile modulus of elasticity of 3,000 kg/mm.sup.2 or less, and compression crimping the mixed filaments.

Abstract: A plurality of heavy denier thermoplastic monofilaments is gathered together and continuously wrapped with a flexible wrapper yarn. The wrapped bundle is fed into a stuffer crimper to form a multiplicity of texturized bends. The product is a stiff, pliable texturized yarn and the nomofilaments in the wrapped bundle have a multiplicity of heat-set bends repeating lengthwise along the lengths of the monofilaments.

Abstract: The steaming device consists of two halves, one of which is arranged above a fiber route and the other of which is arranged below the fiber route. The steam expands, from a steam supply nipple extending into a U-shaped housing, first into a distributor chamber covered by a partially permeable metal sheet. The metal sheet exhibits perforated zones arranged at mutual spacings, these zones being located with respect to the zones of a further perforated metal sheet, arranged thereabove at a spacing, in such a way that permeable regions of one metal sheet are disposed oppositely to impermeable regions of the other metal sheet. A heater is provided between the two perforated metal sheets. The halves of the steaming device are mounted so that they can be swung open and are regulated by means of a steam supply safety circuit.

Abstract: A process for storing sound and heat insulating fiber materials comprising reducing fiber-fiber friction in the product by drying and by applying a friction reducing agent, preferably a silicone oil, onto said fibers, optionally freezing the product, preferably to a temperature below the glass transition temperature of the adhesive in the product, enclosing the product in an air-tight and moisture-proof material, evacuating the package and reducing the porosity of the product by at most 1/3 by compressing, sealing the package and, after storing, opening the package and optionally working the product mechanically.

Abstract: A process is provided for space dyeing synthetic yarn in which the synthetic yarn, such as polyester yarn, wound upon a yarn package, is first treated by immersing the ends of the package into a solution of at least one sublimatable ink, thereby dyeing the yarn located at the ends of the package but leaving the yarn at the center of the package undyed, and then at least two ends from at least two such packages are passed through otherwise conventional drawing and texturizing apparatus. Each yarn so fed is intermittently dyed and undyed along its length, the color strength near the dye boundaries being attenuated and muted due to sublimation of the inks and diffusion and migration of the dyes through the yarn ends and into the package. By utilizing at least two feed yarn packages in such process having significantly different diameters and different colored ends thereof, very highly random dyeing effects are achieved in a knitted or woven fabric produced from such yarns.

Abstract: Multifilament thermoplastic synthetic yarn is textured by an improved process involving propelling the yarn through an energy tube by superheated steam to strike, at an oblique angle, an unyielding barrier within a chamber in which the yarn then forms a plug on a moving perforate surface. The improvement comprises heat-setting the yarn, before the texturing operation, at constant length to the point that its density increases to at least 50% of the difference between that of undrawn amorphous yarn and the maximum normally attainable in such yarn; and feeding the resulting yarn hot into the energy tube whereby tendency toward shrinkage of the yarn resulting from undergoing crimping is reduced, and/or a higher texture level is obtainable at given temperature of the crimping operation.

Abstract: Continuous filaments are fed by aspiration into a stream of heated fluid in a conduit. The filaments are then contacted with at least a second stream of heated fluid in a second conduit of increased cross-sectional area to increase the temperature of the filaments. The combined streams of fluid containing the filaments are transferred to an energy tube having an angular disposition relative to a barrier disposed within a chamber and are directed by said energy tube into contact with said barrier at a force sufficient to initiate crimping of the filaments. A major portion of the fluid is separated from the filaments and expelled from the chamber. The filaments are transported through the chamber by continuous movement of a surface therein at sufficient velocity to cause overfeeding of the filaments, whereby the filaments are forced against a mass thereof and emerge from the chamber in crimped form.

Abstract: While being fed into a laterally confining region to be retained temporarily and be compressively crimped therein, laterally spaced textile strands are traversed laterally to and fro along the entrance to the region. The resulting uneven cross-sectional distribution of crimped strand accumulation in the region is conductive to separation of individual strands upon exiting from the region.

Abstract: A bulked multifilament yarn having filaments of polymeric material has alternating points of maximum polymeric density and minimum polymeric density occurring along the length of each filament with a maximum spacing of 10 meters. The yarn may have a crimped structure in which the crimps are of undulating form with more than 50% of the filaments having maximum amplitudes of undulation less than the diameter of the yarn and more than 50% of each filament lies on one side of a diametral plane of the yarn particular to that filament. A process of producing the yarn includes the steps of jet bulking yarn and projecting it against one end of an elongated package during which the pressure prevailing at said one end of the package fluctuates. The pressure varies between a maximum value and a minimum value with a frequency related to the rate of feed of the yarn.

Abstract: Synthetic thermoplastic fibers are crimped in the presence of steam in a crimping zone wherein there are present a defined first region of low but increasing steam pressure, a defined second region of substantially constant, relatively high steam pressure, and a defined third region of decreasing steam pressure. Superior crimped products are obtained having a more permanent bulkiness which resists deterioration during further processing and subsequent use.

Abstract: Method of treating synthetic threads, particularly filament or foil threads comprises heating the threads up to the center of their cross-section, crimping the heated thread, forming the crimped threads into a wadding, heating and compressing the wadding to reduce its volume and thereafter cooling the compressed wadding. An apparatus for treating the yarn includes a continuous heating chamber which is arranged adjacent a cooling chamber. An apparatus is provided for feeding the yarn to be treated toward the heating chamber and for crimping the yarn preferably while it is heated and perhaps also stretched. Crimping may be carried on by directing the thread under a fluid force against a screen, by passing the thread between a pair of rollers which have crimping means or by a combination of the two and, in addition, stretching means may be provided to stretch the thread.