Abstract: A false twist texturing machine for the texturing of synthetic threads in one handling position at a time, in which a heating device and a false twist unit are disposed within a false twist zone. In an after-treatment zone are disposed a second heating device and a counter-twist apparatus. In this case a residual twist left in the thread from the false twist unit is removed by the counter-twist apparatus. The counter-twist apparatus is for this disposed in one plane with the second heating device, so that the thread is run substantially in a straight thread path.

Abstract: A method and apparatus for winding a continuously advancing yarn, wherein the yarn is wound on a driven tube to a cross-wound package, with the yarn being reciprocated by a traversing yarn guide within a traverse stroke. The length of the traverse stroke is periodically changed, each time with a modified stroke cycle, with the yarn being deposited at the beginning of the modified stroke cycle in a starting reversal point on the outer edge of the cross-wound package. To prevent the yarn from being deposited on the circumference of the package at the same point after completion of the modified stroke cycle, the speed and/or the traverse stroke of the traversing yarn guide are controlled such that after completing the modified stroke cycle, the yarn is deposited at an end reversal point on the outer edge of the cross-wound package which is offset from the starting reversal point at the beginning of the modified stroke cycle.

Abstract: A yarn texturing machine for texturing and winding a yarn, wherein the feed system withdraws the yarn from a texturing device and advances it to a takeup device. Between the feed system and the takeup system, a yarn accumulation or free space is provided for the purpose of receiving the yarn that has slackened during a package doff due to an overfeed. To withdraw the yarn reliably from the feed system, a conveying nozzle is positioned between the feed system and the free space, and the conveying nozzle includes at least one nozzle bore that is directed in the direction of the advancing yarn, so that an air stream directed through the bore toward the yarn generates a tension on the yarn in the direction of its advance. Subsequently, the yarn is blown into the free space.

Abstract: A spin beam for spinning a plurality of synthetic filament yarns with a melt distributor block, which acommodates a spin pump and a plurality of spinnerets. In accordance with the invention, the melt distributor block consists of two structural members, which are interconnected in pressure-tight manner. In a separating line formed between the structural members, distributor lines are formed by grooves, which connect each a melt channel leading from the spin pump to a melt channel leading to the spinneret.

Abstract: A device and method for applying a liquid to at least one advancing yarn which is guided over a surface of a driven godet in contact therewith. A liquid is supplied through a plurality of capillaries to the surface. To this end, the pore-sized openings of the capillaries are evenly distributed on the godet surface being wetted.

Abstract: A powder metering apparatus for making available a powder, in particular for powder coating, and which comprises a metering pump with a rotatably driven metering disk arranged between two lateral plates. The metering pump includes an inlet, through which it receives a powder-air mixture, and an outlet that connects via a suction tube to an injector pump. From the outlet, the powder-air mixture conveyed by means of the metering disk to the outlet is sucked out by a vacuum flow that is generated in the injector pump and enters the metering pump via a suction inlet opening, and the powder-air mixture is then supplied to a consumer.

Abstract: A method and an apparatus for winding a continuously advancing yarn at a constant winding speed to a package on a rotating tube. The tube is mounted on a driven winding spindle. Before the winding cycle, a yarn guide moves the yarn from a threading position to a transfer range for transferring it to the yarn traversing device. In so doing, a transfer tail wind is produced on the tube outside of the traverse range. In accordance with the invention, the speed of the yarn guide is controlled as a function of the winding speed such that a certain number of winds are deposited on the tube for producing the transfer tail wind.

Abstract: The invention relates to a false twist device for a synthetic multifilament yarn for use in false twist texturing machines. The false twist device comprises at least three sets of disks that are each arranged on an axle for rotation in the same direction. The axles are arranged to form an equilateral polygon such that the disks overlap in the center of the polygon. To keep a yarn tension as low as possible at a high yarn speed, the circumferential surface of the disks is the zone of a sphere or a torus with a circumferential surface radius that has a magnitude of at least 35 times the diameter of the twisted yarn.

Abstract: A texturing machine is described which consists of a plurality of processing-points for thermoplastic threads. A feed bobbin, a first delivery mechanism, an elongated first heating device, an elongated cooling device, a false-twist unit, a second delivery mechanism and also a winding-up device are arranged at each processing-point. In this connection several feed bobbins are arranged above one another in a creel frame, and several winding-up devices are arranged above one another in a winding frame. The first delivery mechanism, the heater and the cooling device are located above the frames. In order to guarantee a careful course of the thread as well as operability, the first delivery mechanism is arranged together with a drive in an operational position directly upstream of the inlet of the first heating device.

Abstract: The invention relates to a false twist texturing machine and to a method of texturing synthetic yarns in, in each case, one processing point, in which a twist-stopping device, a heating device, a cooling device and a false twisting unit are disposed inside a false twisting zone. The yarn is withdrawn from the false twisting zone by means of a delivery mechanism. According to the invention, the twist-stopping device takes the form of a rotatable transport roller, around which the yarn is at least partially wrapped in a peripheral direction and which is drivable by a drive in such a way that the yarn is braked or delivered, so that the yarn tensile force is adjustable inside the false twisting zone.

Abstract: An apparatus and method for guiding and cutting a continuously advancing yarn during a package doff in a yarn winding apparatus wherein the advancing yarn is wound on a driven bobbin tube. In this process, the yarn is guided by means of a movable yarn guide along a direction substantially parallel to the axis of the tube. Downstream of the yarn guide, a suction device is arranged, which includes a pneumatic suction inlet end and a cutter. The suction device cooperates with a transfer device, so as to cut the yarn during the package doff and receive the loose end of the advancing yarn. To facilitate a protective processing of the yarn during the package doff, during the catching, and during the winding of initial layers on a tube driven by a drive roll, the yarn guide is arranged in the path of the yarn upstream of the driven tube and the suction device downstream of the driven tube.

Abstract: A method and apparatus for winding a continuously advancing yarn, wherein the yarn is wound into a package that is formed on a rotating tubular core, the yarn being traversed by a yarn guide within a traverse stroke. At the beginning of each traverse stroke, the yarn guide is accelerated within a reversal length to a guiding speed, and after traversing the traverse length it is decelerated within a second reversal length. The yarn traversing mechanism includes a belt drive system for reciprocating the yarn guide and which is controlled by a programmable control device such that the yarn guide is moved within a traverse stroke which is axially shorter than the package length and which is reciprocated between the ends of the package without changing the length of the traverse stroke.

Abstract: A method and apparatus for winding a continuously advancing yarn to form a package, wherein the package is wound on a driven winding spindle that is mounted in cantilever fashion on a movable spindle support. A contact roll lies with a contact force against the circumference of the package. The contact roll is likewise mounted on a movable support, and during the winding cycle, the center distance between the package and the contact roll is increased by a deflection of the spindle support. In this process the drive of the spindle support is controlled by means of a control device which is connected to a sensor that detects the lift of the contact roll. In accordance with the invention, the drive of the spindle support is driven at a deflection speed when the contact roll is outside of its desired range, and at a lower reversing speed when the contact roll is in its desired range.

Abstract: A yarn winding apparatus and a method for winding a continuously advancing yarn on a driven tube. A bobbin tube is clamped between two clamping plates that are rotatably supported on a package holder, and one of the clamping plates includes in its front edge facing the tube a catching slot with a catching nose that is directed in the direction of rotation, and a clamping slot for clamping the yarn. For purposes of threadup, the yarn is guided by a yarn guide and a suction device to the front edge of the clamping plate in such a manner that the yarn and the clamping plate move essentially in the same direction. To guide the yarn after having dropped into the catching slot, reliably to a lead-in plane of the clamping slot, the clamping plate has in its front edge a recess which undercuts the catching nose and the catching slot and forms a guiding edge on the edge of the clamping plate.

Abstract: An apparatus and a method of stuffer box crimping a synthetic multifilament yarn, wherein the yarn is advanced in a conveying nozzle by means of a heated conveying gas into a stuffer box and compressed to a yarn plug. At the outlet of the stuffer box, a pair of rolls form a conveying gap for advancing the yarn plug and which has a width smaller than the cross section of the plug leaving the stuffer box so as to compress the yarn plug. The internal passage of the stuffer box is constructed with a cross section that increases in the direction of advance in such a manner that no significant cohesive force develops on the yarn plug, and the resistance to the forward pressure in the yarn plug resulting from the heated conveying gas is provided essentially only by the force on the yarn plug generated by its compression in the conveying gap.

Abstract: A godet for advancing, guiding, and heating an advancing synthetic filament yarn, which includes a rotating godet casing, which is cup shaped and is mounted over a stationary, tubular support. In the space formed between the godet casing and the support, a radiation heater is arranged on the circumference of the support, and the radiation heater is formed by a heating coil which is wound about the support with a plurality of windings. The coil has over its length different spacings between adjacent windings to provide non-uniform heating along the length of the casing and thereby compensate for the non-uniform cooling of the casing which naturally occurs.

Abstract: A method and an apparatus for spinning, drawing, and winding a synthetic filament yarn, wherein a plurality of filaments are combined in a spin zone to a yarn. Subsequently, the yarn is drawn in a draw zone which includes a draw godet, and then wound in a takeup zone to form a package. To produce a cohesion of the yarn, the filaments are entangled within the draw zone before the yarn leaves the draw godet.

Abstract: A method of producing a synthetic yarn, wherein a yarn is spun and wound in a continuous process. For monitoring the quality, several process parameters are continuously measured. From measured data variations of the process parameters that occur within a predetermined period of time, a quality value is determined that is a measure for the regularity of the production process.

Abstract: A yarn traversing apparatus for reciprocating a running yarn to form a wound yarn package, and wherein the yarn is reciprocated by sequential contact with oppositely rotating rotator blades. The blades can each be driven at a variable rotational speed, so that irrespective of the position of the yarn radially along the length of the rotator blades, the traversing speed of the yarn can be controlled so as to follow a predetermined traversing speed profile, which may be constant or variable.

Abstract: In a godet for advancing and guiding an advancing synthetic filament yarn, the bearing housing for supporting a shaft consists of an inner bearing support and an outer cooling body, which are in a heat conducting contact with each other. Cooling of a bearing within the bearing support is enhanced because the material of the cooling body has a coefficient of thermal conduction which is greater than the coefficient of thermal conduction of the bearing support material. In a heated godet, a cup-shaped godet casing fits over the end of the shaft, and a stationary hollow cylindrical support is fit over the shaft within the godet casing. An annular space is defined between the support and the shaft, and a heating element is mounted to the circumference of the support. The bearing housing at least partially defines openings that provide cooling air to the annular space.