Abstract: A reserve winding of yarn on a tube on which a cross-wound package is built. The reserve includes an end projecting from the windings and extending to provide an initial length along the surface of the tube and around which windings are formed without substantial overlapping with the windings progressing from the inward extent of the initial length of yarn toward the tube end. The reserve winding is formed by a method utilizing an apparatus that is part of a traveling service unit and includes a suction conduit centrally located in a tube clamping plate for drawing-in the end of yarn and yarn guiding and advancing elements that guide the yarn inwardly along the surface of the tube and then advance the yarn outwardly during rotation of the tube to form the non-overlapping windings. The drawn-in end of the yarn is then cut at a maximum of approximately one centimeter from the windings or is inserted into the interior of the tube.

Abstract: A lifter rod actuates controllable yarn reserve devices of an open-end spinning machine. A reciprocating device for the lifter includes a shaft supported in the frame of the spinning machine and driven at a given angular velocity. A swash plate disposed on the shaft revolves at the given angular velocity. The swash plate has a circular-annular bearing with an outer ring being rotatable relative to the swash plate. The outer ring has an articulated coupling for mechanically jigging the lifter rod. A mechanical operative connection connects the articulated coupling with the lifter rod. The shaft, the swash plate, the bearing, the outer ring, the articulated coupling, the mechanical operative connection and the lifter rod form a mechanical operative chain. A jigging amplitude control device is diposed in the mechanical operative chain and firmly connected to and supported in the machine frame.

Abstract: A mottled appearing yarn having a main strand of fibers and wrapper fibers of different color than the main strand. The yarn is produced by feeding longer and coaser fibers with shorter and finer fibers in an open end rotor spinning machine and controlling the operation to accentuate wrapper fiber formation with the longer and coarser fibers. The wrapper fiber formation is accentuated by using a relatively low rotor diameter to fiber length ratio and by using an aggressive navel action.

Abstract: Bobbins spun in a ring spinning machine are conveyed sequentially to a measuring, counting and sorting device located between the ring spinning machine and an automatic winder that winds yarn from the bobbins. The measuring, counting and sorting device senses the presence of a bobbin, counts the bobbins being sensed, senses yarn and bobbin characteristics and compares the characteristics with predetermined standards. The device separates bobbins whose characteristics differ from the standard. Data regarding the operation of the spinning machine and operation of the winding machine are combined with the data obtained by the measuring, counting and sorting device and statistically evaluated for display or for controlling the production of the spinning machine and winding machine or for controlling conveyance of the packages from the winding machine.

Abstract: In an open-end rotor spinning device having a rotatable spinning rotor and a coaxial yarn withdrawal navel mounted in a rotor cover, a tubular twist choking member is removably mounted rotatably in general airtight relation to the cover at an angle with respect to the rotor axis with a yarn withdrawal tube affixed coaxially to the twist choking member. A curved passageway extends longitudinally through the twist choking member with plural obliquely-arranged yarn deflection elements constricting the convex side of the passageway. The twist choking member and the yarn withdrawal tube may be selectivey positioned rotatably as a unit to achieve a desired effect on spinning stability and yarn quality.

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: An apparatus for providing a constant supply of circulating textile bobbin tubes from a delivery conveyor of a textile winding machine to a return conveyor of a textile spinning machine. A reserve magazine containing textile bobbin tubes is combined with an accumulating magazine through which tubes are received from a winder and discharged for feeding to a spinning machine, with the reserve magazine discharging tubes to a transfer conveyor whenever there is an absence of supply of tubes from the accumulating magazine. An overflow collector collects tubes received from the winder in excess of the number necessary to maintain the accumulating magazine full, with the overflow of tubes being transferred manually or automatically to the reserve magazine.

Abstract: A method and a device for improving a yarn produced with genuine twist in the rotor of an open-end spinning apparatus directs the yarn through a yarn take-off nozzle in a given yarn travel direction. The yarn is subsequently diverted from the given yarn travel direction first to one side and then back to the opposite side over false-twist edges disposed obliquely relative to the given yarn travel direction including a last false-twist edge. Outer fiber ends of the traveling yarn are spread radially apart after passing the last false-twist edge. The yarn is subsequently passed through a pair of delivery rollers.

Abstract: A method for sorting cheeses on an automatic winding machine includes predetermining a set-point value ratio of yarn length to cheese diameter. An actual value ratio of yarn length to cheese diameter is automatically measured. The measured values are automatically compared with the set-point values. Cheeses for which the actual value ratio of yarn length to cheese diameter is within a predetermined range of the set-point value ratio are automatically selected as quality cheeses.

Abstract: A open-end spinning assembly includes a silver insertion device, a fiber separating device, a fiber guide device, a fiber collector for collecting, aligning and imparting a rotational movement onto fibers and subsequently applying the fibers to an open yarn end, and a draw-off device drawing-off yarn from the yarn collector. A fed-back yarn end is applied to a piecing fiber quantity fed into fiber collector for forming a piecer. The yarn is continuously drawn-off from the fiber collector and fibers and continuously fed into the fiber collector. A method for monitoring the piecers includes automatically measuring diameter values relative to the longitudinal axis of the yarn for the piecer and for yarn lengths upstream and downstream of the piecer having at least substantially the length of the piecer. The diameter values are electronically stored in memory and compared with comparison values for producing a comparison result.

Abstract: A fiber opening device in a spinning unit of an open-end spinning machine wherein an opening roller is mounted within a housing with the housing being integrally formed from a drawing-in opening past a trash discharge opening to a fiber discharge opening and including integrally therewith a drawing-in trough and wall portions at the trash discharge opening. The housing is pivotally mounted to accommodate variations in the silver feed at the drawing-in roller. In an alternate form, the housing is stationary and the drawing-in roller is mounted for relative movement with respect thereto for the same purpose. The opening roller has a fiber opening surface to which the fibers are confined by side flanges on the opening roller and the trash discharge opening is of a width no greater than the width of the fiber opening surface. The opening roller inlcudes a drive shaft rotatably mounted in the housing so that the opening roller and housing are a unit for easy removal and replacement.

Abstract: A method for piecing a thread formed in an open-end rotary spinning machine to an end of a previously formed thread, wherein spinning fibers are fed to at least one rotating fiber collection surface, the collected spinning fibers are further transported to a thread forming station connected to the fiber collection surface, and the end of the previously formed thread is joined to the spinning fibers transported to the thread forming station as the thread end is rotated, the pieced thread being continuously withdrawn from the thread forming station while spinning fibers are being continuously fed to the fiber collection surface includes a method for piecing a thread formed in an open-end rotary spinning machine to an end of a previously formed thread, wherein spinning fibers are fed to at least one rotating fiber collection surface of a spinning rotor disposed in a closed spinning chamber under negative pressure, the collected spinning fibers are further transported to a thread forming station connected to the

Abstract: Apparatus for freeing the bottom wraps and the downwinds of yarn from a textile bobbin to provide a free yarn end in preparation for subsequent unwinding of the bobbin, including three bobbin engaging and rotating rollers arranged in a triangle with two of the rollers being driven and the third roller being movable into engagement with the top of the bobbin to rotationally support the bobbin by the three rollers. The axes of rotation of two of the three rollers are skewed with the skewing being related to the direction of rotation to cause an upward component of rotational support of the bobbin to raise it against a stop member and away from a bottom support plate that is then pivoted downwardly to form an opening to accommodate jets of compressed air acting somewhat downwardly against the bobbin to free the downwinds and bottom wraps of yarn.

Abstract: A silver feed and opening device for open-end spinning applications comprises a housing having a rotatable opening roller associated with a pivotable guide plate having a first sliver guide portion for directing incoming sliver to the opening roller, a second arcuate fiber guide portion extending along a portion of the opening roller circumference in its direction of rotation, and a third debris guide portion extending outwardly from the opening roller and defining with the housing a debris discharge opening. The guide plate is of a unitary one-piece construction without joints between individual portions to prevent undesirable fiber accumulation which tends to occur in conventional devices. Each of the fiber and debris guide portions of the guide plate are spaced sufficiently from the sidewalls of the housing to form side slots which are a multiple of the thickness of the fibers, thereby to prevent accumulation thereof between the guide plate and the housing.

Abstract: A friction spinning apparatus includes first and second perforated drums forming a spinning wedge therebetween with a spinning zone. The drums are driven in the same direction with the first drum having a greater circumferential speed than the second drum and with the first drum rotating into the spinning wedge and the second drum rotating out of the spinning wedge. The drums define an imaginary line at a location at which the drums are closest to each other. First and second suction devices are disposed in the interior of the first and second drums. The suction devices each have an intake slit formed therein. The intake slits follow paths diverging from each another and from the imaginary line at least at forward ends thereof. The intake slits are directed against the spinning wedge and each discharge in the vicinity of the inner surface of a respective one of the drums.

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: In a textile winding machine of the type wherein yarn is cross-wound onto a bobbin peripherally driven by a friction roller, the winding operation may be monitored and controlled to achieve a high winding quality by constantly varying the time period per revolution of the friction roller, constantly measuring the respective time periods per revolution of the bobbin and the roller, at least intermittently comparing the measured revolution time periods, and regulating the friction roller drive or stopping the winding operation altogether or otherwise intervening in the winding operation as a function of deviations of the comparison result from established theoretical values.

Abstract: Automatic winding of yarn on a take-up package of a textile winding machine is controlled with devices including a yarn severing device actuated when the winding is interrupted, a device for sensing the quality of winding of the package, and a processing device that is responsive to a batch change signal which corresponds to an indication of dissimilarity of characteristics between the take-up yarn and the supply yarn. Re-starting of the winding is prevented if the package does not have preset quality characteristics and/or if there is a dissimilarity between the take-up yarn and the supply yarn. Another condition for re-start is the detection by a yarn presence monitoring device that a joined yarn is present, indicating the correction of the yarn interruption after actuation of a yarn joining device.

Abstract: An improvement in a multi-station bobbin winding machine having an active cop unwinding position and replacement cop reserve position at each winding station with a movable reserve cop receptacle at the reserve position, wherein a yarn suction device is affixed at each winding station to the receptacle for disposition adjacent a nose portion of a reserve cop received thereby for locating and retaining a leading yarn end of the reserve cop, without obstructing operator access to the winding station.

Abstract: A yarn engaging element is manipulated from a non-operating position through the winding path of a textile winder to engage and guide a yarn end to be spliced to a splicer. After splicing, the yarn engaging element returns at a controlled rate to release the spliced yarn at the winding path, with the release being sufficiently gradual to allow the resumption of winding to maintain tension in the spliced yarn as it moves from the splicer to the winding path, thereby avoiding sufficient slack in the spliced yarn to create kinking and yarn breaking. The yarn engaging element is manipulated by a four-link linkage controlled by a piston-cylinder mechanism or by a camming mechanism.