Abstract: A method and a device for the production of polyamide 6 pellets wherein an intermediate drying is not necessary and a combined pelletizing and extraction take place. Depending on the intended use, the pellets may directly be used or subjected to further treatment steps. A device for the production of polyamide 6 pellets includes a melt device for providing a melt of polyamide 6, an underwater pelletizing system which is operable under increased pressure, and a vertical vessel having a cylindrical section and a tapered bottom section. The tapered bottom section is provided with a cooling device and is connected to a pipe comprising a screw and/or a rotary gate valve for conveying pellets. The device includes a circuit for circulating an aqueous solution of ? caprolactam through the underwater pelletizing system and the vertical vessel.

Abstract: A multi-station textile machine, especially a double twisting machine or cabling machine, has spool containers arranged adjacent to one another in rows for receiving feed spools. A guide rail of a continuously or intermittently driven endless conveyor extends about the periphery of the machine frame in close contact therewith and has spool holders for conveying the feed spools. The lowermost position of the feed spools conveyed by the spool holders defines a horizontal plane which is substantially at the same level as the plane defined by the upper side of the spool containers. The spool holders are spaced apart from one another by a distance which is three to eight times the distance between neighboring spool containers.

Abstract: Control means are provided for an apparatus for cross-winding packages of textile yarn or the like. The control means includes means operable during at least a portion of the rotation of the package at the selected rotational speed for increasing the relative frequency of traverse of the yarn guide means with respect to the selected rotational speed to a ratio less than the ratio of the rotational speed to the relative frequency of traverse prior to rotation at the selected rotational speed. The control means can gradually increase the relative frequency during operation at the selected rotational speed so that the ratio of the rotational speed to the relative frequency of traverse of the yarn guide means gradually decreases from the ratio of the rotational speed to the relative frequency of traverse at the beginning of rotation at the selected rotational speed.

Abstract: An apparatus for changing yarn carriers in a textile machine, particularly a ring spinning machine, funnel spinning machine or ring twisting machine, includes a revolver having an axis, a pair of spindles being disposed on the revolver symmetrically to the revolver axis and having axes, and the spindles of the pair being rotatable in mutual alternation between a spinning position and an unwinding or disposal position. According to one embodiment, the axes of the spindles of the pair are inclined relative to the revolver axis by an acute angle and diverge in a direction toward the free ends of the spindles. According to another embodiment, at least two pairs of spindles are disposed on the revolver for serving at least two adjacent spinning or twisting stations of the textile machine, and each two adjacent spindle axes are mutually parallel at a given spacing.

Abstract: A package transport mechanism comprises a package carrier for receiving and supporting a package on its upper surface, and a lifting device carrying the package carrier on its upper end for upward and downward movement and for rotation about a vertical axis. The package carrier includes a package supporting device on its upper surface comprising a horizontally-extending endless conveyor and devices for selectively driving the endless conveyor in either direction, a base plate for movably carrying the supporting device, and devices mounting the supporting device on the base plate for pivoting movement about a horizontal axis arranged centric with the longitudinal center plane of and below the endless conveyor. The lifting device comprises a lifting column which defines the vertical axis of rotation.

Abstract: A ring spinning and spooling frame includes spooling stations. A plurality of spindles are disposed in pairs on bearing plates. At least two of the pairs of the spindles are associated with one of the spooling stations. The bearing plates are movable in position between a ring spinning position and an unreeling swiveled position of the spindles. An apparatus which carries the bearing plates pivots one of the bearing plates through 180.degree. out of the vicinity of adjacent bearing plates between the ring spinning position and the unreeling swiveled position of the spindles.

Abstract: Control means in an apparatus for cross-winding packages of textile yarn or the like is provided and includes means operable during at least a portion of the high speed or accelerating rotation for increasing the relative frequency of traverse of the traversing yarn guide means with respect to the rotational winding speed of the package from a frequency at which the ratio of the rotational winding speed to the relative frequency of traverse is greater than the ratio of the selected rotational winding speed and the related selected frequency of traverse. The control means can gradually increase the relative frequency during the high speed or accelerating rotation so that at least before the end of the high speed or accelerating rotation, the ratio of the rotational winding speed to the relative frequency of traverse of the yarn guide means is approximately the same as the ratio of the selected rotational winding speed and the related selected frequency.

Abstract: A transport means for transporting packages at a winding machine to a plurality of stations for unwinding the packages is provided. The transport means includes a plurality of generally horizontally disposed, partially overlapping, package-supporting plates arranged in a sequential series and means for moving each plate about a generally vertical axis. The surface of each plate moves through an advancing path and transversely of the winding machine through an unwinding station. The packages are individually supported on the package supporting plates for circulation through the unwinding station.

Abstract: A yarn traverse winding apparatus for a textile machine producing cross-wound bobbins includes a yarn traversing zone having reversing points. A traction mechanism transmission has an endless traction mechanism being diverted outside the traversing zone by guide rollers between a first belt run movable in a given traversing direction and a second belt run movable parallel to the first belt run in an opposite traversing direction. The belt runs have inner surfaces facing toward each other and outer surfaces facing away from each other while in the traversing zone. Yarn are drivers mutually spaced apart along the traction mechanism and a yarn guide element transfers yarn at the reversing points from a yarn driver on one of the belt runs to a yarn driver on the other of the belt runs.

Abstract: A yarn traverse-winding apparatus of a textile machine producing cross-wound bobbins has a given traversing width and an endless yarn traversing belt. The belt has a belt body, yarn drivers spaced apart along the belt body, and inlays spaced apart within the belt body at intervals smaller than the given traversing width. The inlays are individually detectable by a sensor aimed at the yarn traversing belt.

Abstract: An apparatus for transporting cops and cop tubes includes a plurality of circular-disk-type carriers having two opposite sides. Spindle bearings each have a bearing portion penetrating and protruding beyond a respective one of the carriers toward one of the opposite sides of a respective one of the carriers. Spool spindles each are rotatably supported in and protrude beyond a respective one of the bearings toward another of the opposite sides of a respective one of the carriers for carrying a cop or a tube. The carriers have substantially planar lower surfaces each surrounding a respective one of the protruding bearing portions. A transport apparatus movable in a given transport direction has a surface operatively connected to one of the opposite sides of each of the carriers. Another of the opposite sides of each of the carriers is slidingly guided in a guide rail.

Abstract: A machine producing cross-wound bobbins or cheeses has a drum winding a yarn travelling in a given yarn travel direction on a cheese over a given traverse winding width with reversal points. A traverse winding apparatus includes a traction mechanism transmission having an endless traction mechanism. The traction mechanism is guided over rollers defining first and second traction mechanism segments movable in opposite directions at the same speed. The traction mechanism includes yarn entrainers spaced apart by at least substantially twice the given traverse winding width. First, second and at least one further yarn guide are in alternation with the traction mechanism segments as seen in the given yarn travel direction for supporting the yarn during traverse winding and for transferring the yarn between the yarn entrainers at the reversal points. Each of the yarn guides has a concave yarn guide contour with decreasing depth as seen in the given yarn travel direction to be contacted by the travelling yarn.

Abstract: An automatic cross-wound bobbin winding machine includes a supporting frame and a plurality of winding devices secured on the supporting frame. Each of the winding devices includes pre-assembled modular structural units each having individual parts in the form of at least a yarn run-off location for a run-off spool, a yarn tensioner, a yarn joining device, and a cross-wound bobbin winding mechanism. A plurality of the structural units are combined into standardized or model-specific pre-assembled structural assemblies. Each of the structural units and each of the structural assemblies have pre-readied fastening devices for interchangeable clamping to an adjacent structural unit or structural assembly in an accurate position.

Abstract: A yarn traversing mechanism having oppositely traversing yarn engaging elements and transfer means that disengage yarn from one element and transfer it into engagement by an oppositely traversing element at a plurality of different yarn reversing locations at each end of the yarn traverse. The different reversing locations are determined by an unequal spacing of yarn engaging elements and by either selectively raising a yarn guide member or displacing yarn engaging elements differently at different traversals of the yarn.

Abstract: An endless yarn traversing band for a yarn traversing device in a machine for producing cross-wound bobbins. The band has spaced yarn guiding projections in a sawtoothed configuration. The band is formed of a textile yarn or metallic yarn fabric embedded in an elastomeric material. C-shaped sheaths of stainless steel are clamped over the leading edges of the yarn guiding projections. These leading edges project generally perpendicularly from the band up to a maximum inclination away from the direction of travel of the band of approximately 10 degrees. The trailing edges of the yarn guiding projections are convexly shaped such as with an outer extent angled approximately 10 degrees inwardly from the outer end of the leading edge and an inward extent extending at a greater inclination.

Abstract: Heat exchanger tubes which are immersed in a fluidized bed of a combustion fluidized bed installation are provided with flow deflectors which reduce erosion of the fluidized materials in the bed on the tubes. The flow deflectors are preferably fins or pins, which protrude from the surface of the tubes and which disturb the erosive flow against the outer walls of the tubes. The flow deflectors also increase the surface areas of the tubes and thereby improve heat transfer from the combustion in the fluidized bed to a fluid heat exchanging medium within the tubes.

Abstract: A thread traversing device of a cross-wound bobbin producing machine includes a belt drive having a first belt run with a first thread follower moving in a given traversing direction at a given speed and a second belt run with a second thread follower moving in a direction opposite to the given traversing direction at the given speed, the thread followers having upper ends and being spaced apart by at most twice a given traversing width, and a stationary thread guide for transferring a running thread from one of the thread followers to the other, the thread guide having a concave thread guiding contour touched by the running thread with reversing points defining a traversing path therebetween, the thread guiding contour lifting the running thread at the reversing points over the upper end of one of the thread followers so that the thread is taken along by the other of the thread followers and rides on the thread guiding contour.

Abstract: Winding device for cross-wound bobbins, including a winding frame rotatably supporting a bobbin, a drive drum for rotating the bobbin, and a drive for rotating the drive drum, the improvement including an apparatus for automatically lifting the bobbin from the drive drum upon the stoppage of the drive, the lifting apparatus including a disconnection device being connected to the drive and being switchable into different switching states for controlling the drive dum, a device for lifting the winding frame being connected to the disconnection device and being controlled in dependence on the switching state of the disconnection device, and a coupling having a first coupling element connected to the winding frame, a second coupling element connected to the frame lifting device, and a control element controllable by the frame lifting device for separating and joining the coupling elements.

Abstract: A controllable and adjustable yarn tensioner having two rotationally driven brake plates, between which yarn to be placed in tension is guided, includes first and second rotationally supported shafts, one of the brake plates being disposed at one end of the first shaft, the other end of the first shaft having an operative connection with a driving device; the other of the brake plates being disposed at one end of the second shaft; both the first and the second shafts being in mutual alignment along a common rotary axis, the other end of the first shaft being also connected, via a transmission system disposed outside of the brake plates, to the other end of the second shaft; one of the two brake plates having a compression spring contributorily determining the braking force at which the brake plates are applied, whereby the braking force is adjustable by adjusting the length of the spring; the first shaft being axially slideable; and a brake plate-disengagement device connected to the first shaft.

Abstract: A method for calling a travelling bobbin-changing device to a winding station of a bobbin winding machine, each winding station having a thread presence monitor for monitoring the presence of a thread, a bobbin-stoppage indicator for indicating stoppage of rotation of the bobbin, and a bobbin filling indicator for indicating a predetermined fullness or thread length or diameter of the bobbin, includes continuously checking for the presence of a thread connected to the bobbin with the thread presence monitor, continuously checking for a stoppage of the rotation of the bobbin with the bobbin-stoppage indicator, continuously checking for the predetermined fullness or thread length or diameter of the bobbin with the bobbin filling indicator, issuing a signal when simultaneously the thread is present, the rotation of the bobbin has stopped and the predetermined fullness or thread length or diameter of the bobbin has been reached, and stopping the bobbin-changing device at the winding station for exchanging the bob