Abstract: A drawing apparatus for air spinning machines with multiple feeds includes independent introducer elements that feed simultaneously at least two separate slivers of textile fiber. A first drive roller intercepts a first sliver and a second drive roller intercepts the second sliver. The drive rollers may be operated at different speeds of rotation, to perform different degrees of drawing of the two slivers.

Abstract: A rotor spinning machine includes a plurality of work stations arranged side by side between two front-side ends along at least one longitudinal side of the machine. Each work station includes work elements for producing and winding a yarn, such as a feed device, an opening device, a spinning rotor, and a winding device. A suction device provides a negative spinning pressure at the work stations and includes a negative pressure source arranged at each of the two front-side ends of the rotor spinning machine. Each negative pressure source is connected to a separate negative pressure channel that extends in a longitudinal direction of the rotor spinning machine only over a part of a total number of the work stations. Each work station includes an individual drive for the spinning rotor.

Abstract: In an apparatus for detecting a parameter at a plurality of slivers fed to a drafting system of a spinning machine, especially for detecting the movement and/or the presence of a sliver, in which the parameter is measurable separately at each sliver, each sliver is drawn out of sliver cans over a respective driven feed roller and fed to the drafting system and is mechanically sensed by a feeler element, the deflections of which are convertible into electrical signals. To allow an improved and more accurate detection of the individual slivers in a structurally simple manner, a distance sensor that is a contactless distance sensor is provided to detect the position of each feeler element, the sensor being connected to an electrical evaluating unit.

Abstract: In an apparatus on a spinning preparation machine, for example a flat card, roller card, draw frame, combing machine or the like, for ascertaining the mass and/or fluctuations in the mass of a fiber material, for example at least one fiber sliver, fiber web or the like, of cotton, synthetic fibers or the like, the fiber material is scanned mechanically by a feeler element the excursions of which are converted into electrical signals. In order to facilitate improved and more accurate measurement of the fiber in a way that is simple in terms of structure and installation, a contactless distance sensor is provided for detecting the position of the feeler element, the sensor being a sensor that measures distance using transmitted waves, and is connected to an electronic evaluating device.

Abstract: In an apparatus on a combing machine for monitoring the noil percentage, having a supply device, a combing device for combing out fibre material to be combed and at least one device for forming a combed sliver, at least one arrangement is present for continuous automatic generation of a signal representing the noil percentage when the combing machine is running, the arrangement comprising at least one measuring device for the quantity of supplied fibre material and at least one measuring device for the quantity of combed fibre material and a calculating means for determining the noil percentage. For monitoring and optimisation of the noil percentage, the or each measuring device for measuring the amount of combed fibre material may comprise a measuring device for a comber sliver having a feeler element or a contactless sensor.

Abstract: In an apparatus on a drafting system of a spinning room machine, especially a draw frame, carding machine, combing machine or the like, for weighting the drafting system rollers, at least one pressure-medium cylinder with a piston is acted upon by pressure medium and is arranged so as to be axially movable inside a cylinder housing. A piston rod extends from piston passing through at least one cylinder cover that defines the cylinder housing at the end. In order to improve the apparatus, for determining the position of the piston with the piston rod, at least one inductive displacement sensor is integrated into the pressure-medium system, and the inductive displacement sensor is connected to an evaluation device.

Abstract: A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fiber material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for connection to a measuring device (16) for measuring the strip density (mass per unit length) or the strip thickness and/or the dampness of the fiber material (FB), continuously passing through the resonator chamber (31). Said device is characterized in that the resonator (30) is integrated in a functional group (20; 120; 220; 320; 420) of the spinner preparation machine which is typical for the machine. A spinner preparation machine, in particular a carding, drawing or combing machine, is further disclosed which comprises a corresponding device.

Abstract: The invention uses microwaves in the spinning industry in order to determine the band mass of an elongated, substantially non-twisted fiber structure. In addition, a method for measuring the sliver mass from the frequency detuning and the damping of resonance signals of a microwave sensor while taking into consideration the moisture of the fiber structure with a computer is suggested. Likewise, a corresponding spinning preparation machine and a laboratory device for measuring the sliver mass are part of the invention. Lastly, a method and a spinning preparation machine for recognizing foreign matter in a moved fiber structure with the aid of microwaves is suggested.

Abstract: Different improvements of a spinning preparation machine are proposed to measure the fiber sliver thickness or the fiber sliver cross-section of at least one fiber sliver by means of one or several microwave sensors. One improvement is characterized by compressing means and special mechanical guiding elements that can be installed before, after and/or in the microwave sensor. It is also proposed to install a pair of conveyor rollers after a microwave sensor that can be designed in particular as an input roller pair of the subsequent drafting equipment. Furthermore, proposals are made for the calibration of the (at least one) microwave sensor.

Abstract: The invention concerns an apparatus for the optimization of the regulation adjustment of a machine in spinning preparation, in particular a regulated draw frame, a carding machine, or a combing machine, to which one or more fiber bands are continually fed. The apparatus has at least one sensor which is positioned ahead of the feed end of a draw frame machine for the purpose of capturing the values of band thicknesses of one or more of the entering fiber bands. The apparatus also has at least one delivery end sensor located at the delivery end of the draw frame machine for the purpose of capturing the values of the band thickness of the produced fiber band of a first draw frame operational mode. The apparatus also includes a microprocessor for the comparing of the captured values of the at least one delivery end sensor to those of at least a second draw frame operational mode, whereby the second draw frame operational mode does not represent the normal operational mode of the draw frame machine.

Abstract: A value editor and a corresponding method is described for a measuring apparatus, by which setting parameter values can be modified. Parameters can be set for at one of multiple functional units and modified by control elements. Multiple control elements can together constitute a control block and the active control block is highlighted by a focus. To modify parameter values in the highlighted focus, displayed alphanumerically in the control elements, a first or second edit mode can be selected.

Abstract: An apparatus for determining a point of regulation in a drafting unit includes a sensor for generating signals as a function of change in a quality-representing magnitude of the fiber material running through the drafting unit; a control device receiving the signals for varying a draft of the fiber material by the drafting unit; and an arrangement for continuously determining, during operation, optimal points of regulation based on the signals.

Abstract: A card is equipped with a regulating drafting system at the card delivery arrangement. The measuring values for regulating the drafting system are obtained from the drafted fibre sliver. The sliver depositing device can be pre-controlled relative to the drafting system in order to keep the stresses in the fibre sliver between the drafting system and the sliver depositing device within limits. A fibre sliver storage device (11) is arranged upstream from the regulating drafting system (13) with relatively small capacity. In order to enable timely action if long term deviations are detected in the fibre sliver mass (m) delivered, a sensor (10) can be arranged between the card (1) and the regulating drafting system (13), and the base rotational speed (U14) of the drive (25, 26) of the regulating drafting system (13) can be adapted based on signals transmitted by the sensor (10).

Abstract: A fiber processing machine includes an arrangement for forwarding a sliver through a space in an advancing direction; an arrangement for continuously displacing the sliver in the space transversely to the advancing direction while the sliver is forwarded in the advancing direction; and an apparatus for detecting a presence, absence, motion or standstill of a sliver. The apparatus includes a transmitter emitting a sensor beam passing through the space transversely to advancing direction for being intermittently interrupted by the sliver during displacement thereof transversely to the advancing direction; and a receiver positioned in a path of the sensor beam for receiving a light or a dark signal dependent whether or not the sensor beam is interrupted by the sliver during displacement thereof transversely to the advancing direction.

Abstract: A method of determining an optimal preliminary draft of sliver running consecutively through a preliminary drafting field and a principal drafting field. The method includes the following steps: setting various levels for the preliminary draft; measuring quality-characterizing magnitudes of the sliver drafted at the various preliminary draft levels; deriving sliver number deviations from the quality-characterizing magnitudes; determining a function between the sliver number deviations and the respective preliminary draft levels; forming two approximated straight lines from the function; determining a value of a point of intersection between the two straight lines; and utilizing the value of the point of intersection for setting the optimal preliminary draft.

Abstract: The invention relates to a method for controlling the draft of a fiber mixture (e.g. a sliver) of a textile machine, with sensors being provided which detect the fluctuations in mass of the fiber mixture which is supplied to a drafting arrangement unit including at least one changeable drafting zone which compensates the fluctuations in mass. A delay time is provided in order to take into account the running time of the fiber mixture from the measuring sensor up to a control application point. A method is therefore proposed whereby, for the purpose of changing certain control parameters, the delivery speed of the fiber mixture and/or the comparison of the measured progress of the mass of the fiber material supplied by the drafting arrangement unit with a predetermined setpoint progress of mass (setpoint) are used.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver includes the following steps: Obtaining at least three measured values of a quality-characterizing magnitude, such as the CV value, of the drafted sliver; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; and numerically computing a function between the quality-characterizing magnitudes and application points of regulation from the measured values.

Abstract: A draw frame includes a transport roll pair for simultaneously guiding a plurality of slivers running in an advancing direction; and a series of drafting roll pairs spaced from one another in the advancing direction. One of the drafting roll pairs is a first drafting roll pair as viewed in the advancing direction. The first drafting roll pair is positioned downstream of the transport roll pair. A measuring device is contacted by the running slivers and includes a pressure-sensitive member exposed to a force derived from the running slivers for emitting a signal representing the force; and a deflecting arrangement for deflecting the running slivers for causing them to be partially trained about the deflecting arrangement to exert on the pressure-sensitive member a pressing force proportional to a tension of the slivers prevailing upstream and downstream of the pressure-sensitive member.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver, includes the following steps: obtaining a plurality of measured values of a quality-characterizing magnitude, such as a CV value, of the drafted sliver portion; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; obtaining several measured values of a quality-characterizing magnitude based on an un-drafted sliver portion and determining the function between the quality-characterizing magnitudes and application points of regulation from measured values at the un-drafted sliver portion and at the drafted sliver portion.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver includes the following steps: obtaining a plurality of measured values of a quality-characterizing magnitude, such as a CV value, of the drafted sliver; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; obtaining measured values of at least two quality-characterizing magnitudes based on the drafted sliver; combining values of the quality-characterizing magnitudes at the sliver, which correspond to one another with respect to the application point of regulation, to a quality-characterizing number QK, and forming a function based on several numbers QK. The function has a minimum corresponding to an optimal application point of regulation Ropt.

Abstract: A draw frame includes a transport roll pair for simultaneously guiding a plurality of slivers running in an advancing direction; and a series of drafting roll pairs spaced from one another in the advancing direction. One of the drafting roll pairs is a first drafting roll pair as viewed in the advancing direction. The first drafting roll pair is positioned downstream of the transport roll pair. A measuring device is contacted by the running slivers and includes a pressure-sensitive member exposed to a force derived from the running slivers for emitting a signal representing the force; and a deflecting arrangement for deflecting the running slivers for causing them to be partially trained about the deflecting arrangement to exert on the pressure-sensitive member a pressing force proportional to a tension of the slivers prevailing upstream and downstream of the pressure-sensitive member.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver, includes the following steps: obtaining a plurality of measured values of a quality-characterizing magnitude, such as a CV value, of the drafted sliver portion; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; obtaining several measured values of a quality-characterizing magnitude based on an un-drafted sliver portion and determining the function between the quality-characterizing magnitudes and application points of regulation from measured values at the un-drafted sliver portion and at the drafted sliver portion.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver includes the following steps: Obtaining at least three measured values of a quality-characterizing magnitude, such as the CV value, of the drafted sliver; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; and numerically computing a function between the quality-characterizing magnitudes and application points of regulation from the measured values.

Abstract: A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver includes the following steps: obtaining a plurality of measured values of a quality-characterizing magnitude, such as a CV value, of the drafted sliver; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; obtaining measured values of at least two quality-characterizing magnitudes based on the drafted sliver; combining values of the quality-characterizing magnitudes at the sliver, which correspond to one another with respect to the application point of regulation, to a quality-characterizing number QK, and forming a function based on several numbers QK. The function has a minimum corresponding to an optimal application point of regulation Ropt.

Abstract: The object of the invention is to facilitate the entry of a fiber band into a drawing machine. The invention is comprised of a fiber band insertion apparatus having a combination condenser and guide device with a longitudinal slot extending over its entire length. The guide device is followed by roll pair, which, at least during the laying in of the fiber band, has an accessible entry opening. This opening is at least partially formed by a recess in at least one of the opposed sides of the roll pair. The recess is separated by a flange on one of the circumferential rim surfaces which are mutually profiled to provide space for a compression line for the fiber band. The entry opening of the roll pair and/or feeders, as well as the entry slot of the condenser are, essentially, arranged in a common plane. With the aid of the invented apparatus, the fiber band is laid into the band entry device by a movement transverse to the normal transport direction of the fiber band when the drawing machine is running.

Abstract: A fiber processing machine includes an arrangement for forwarding a sliver through a space in an advancing direction; an arrangement for continuously displacing the sliver in the space transversely to the advancing direction while the sliver is forwarded in the advancing direction; and an apparatus for detecting a presence, absence, motion or standstill of a sliver. The apparatus includes a transmitter emitting a sensor beam passing through the space transversely to advancing direction for being intermittently interrupted by the sliver during displacement thereof transversely to the advancing direction; and a receiver positioned in a path of the sensor beam for receiving a light or a dark signal dependent whether or not the sensor beam is interrupted by the sliver during displacement thereof transversely to the advancing direction.

Abstract: A draw frame for drawing a plurality of simultaneously running inputted slivers and for combining the drawn silvers into a single outputted sliver includes a draw unit having an inlet, an outlet and a roll assembly between the inlet and the outlet for drawing the inputted slivers; a creel for accommodating a sliver-containing coiler cans for advancing simultaneously a plurality of slivers to the draw unit; a sliver guide and a sliver trumpet arranged downstream of the draw unit outlet, as viewed in a direction of sliver run, for combining the plurality of drawn slivers into the output sliver; and a guiding assembly for orienting the running inputted slivers to run linearly and parallel to one another, as viewed in a vertical direction, from the creel at least to the outlet of the draw unit.

Abstract: A regulated draw unit for drawing sliver running therethrough includes a plurality of roll pairs each defining respective nips through which the sliver consecutively passes in a running direction. A pressure bar which is situated between two adjoining roll pairs has a region for contacting the running sliver. The pressure bar is supported in such a manner that the pressure bar region is spaced from an imaginary straight line extending from the nips of the two adjoining roll pairs, whereby the running sliver is deflected. A measuring device is coupled to the pressure bar for emitting signals representing forces applied to the pressure bar by the running, deflected sliver.

Abstract: An apparatus for measuring the thickness of a plurality of side-by-side running slivers includes a supporting surface guiding the side-by-side running slivers thereon in a single plane; a holding member; and a plurality of sensor elements movably secured to the holding member to be movable in a direction transverse to the plane. Each sliver is contacted by a separate sensor element for causing excursions thereof by thickness fluctuations of the running sliver. Each sensor element is yieldingly pressed against a respective sliver, and each sensor element cooperates with the supporting surface for pressing the running slivers against the supporting surface. An adding device adds the excursions of the sensor elements, and a transducer converts the excursion values into electric pulses.

Abstract: The present invention concerns a drafting system (30) with a drive (M2) provided with a regulating device (M3, 33) for levelling out mass variations in a fiber mass (6) supplied to the drafting system by a supply source (1). The mass variations are detected by at least one measuring sensor (70) coordinated to the drafting system and the corresponding signals are transmitted to a control unit (S). A further device (11, 12, 62, 63) may be coordinated to the drafting system (30) which is suitable for detecting differences between the delivery speed of the supply source (1) and the intake speed of the drafting system (30) and apply it for influencing the base rotational speed of the drafting system or to detect long term mass variations from a predetermined desired value in which arrangement these mass deviations detected are applied for influencing the base rotational speed of the drafting system.

Abstract: The present invention relates to a process and to a device for the control of draft in a drafting system for textile fiber material, whereby a measuring element (MS) which measures the moving fiber material (FM) before its entry into the drafting system (S) transmits measured values (M1 . . . Mn) to a draft regulating system (VR) and whereby the fiber material (FM) is drafted by means of the operating elements of the drafting system after passage of a delay time which is a function of the deviation of the measured values (M1 . . . Mn) from a target value (SW). It is the object of the invention to substantially eliminate fluctuations of the thickness of the fiber material through compensation in a drafting system with draft regulation. This object is attained in that the measured values (M1 . . . Mn) are transmitted to a correction device (SE) and in that an evolution of the draft (K2) and/or a regulating error value (K3) are derived in the correction device (SE) from the measured values (M1 . . .

Abstract: The invention concerns a device for measuring the thickness and or unevenness of wadding or non-wovens. The device has a guide element (30) for the wadding or non-wovens and a thickness sensor (26, 27, 28) which presses the wadding or non-wovens against the guide element and can move relative to the latter, the position of the sensor providing a measure of the thickness and/or unevenness of the wadding or non-wovens. To achieve a simpler and cheaper design without sacrificing measurement accuracy, an individual sensor is provided with a translation element (31) which converts the deflections of the individual sensor in one direction into a path signal available in another direction. This allows signals corresponding to the deflections of several individual sensors to be added together and applied to a single common path measurement system (32).

Abstract: Method and device for collection of the web, and drawing of the latter into the output unit of a carder, in which the drawing is subdivided for a first part between the compactor unit for the web and the first pair of drawing rollers for the strip, and a second drawing part between the rollers of the drawing unit for the strip.

Abstract: A textile machine, more particularly a drawing frame, carries out two drawing passes while reducing as much as possible the harmful effects of any stoppage and eliminating the need for spare tubs holding processed slivers of cotton fibers.

Abstract: The invention concerns a process and an apparatus for the storage of a textile material between operating components of spinning mill machines, wherein a first driving means drives an operating component which delivers the material into a storage facility and a second driving means drives another operating component which removes the material from the storage facility. One of the operating components is a high-dynamically reacting component, and the other operating component is a low-dynamically reacting component. The purpose of the invention is to minimize the size of the storage facility and to simultaneously reduce the amount of stored material. This is accomplished in that the quantity of delivered and removed material at any given time is continually measured and a running difference between the two quantities is determined.

Abstract: A strain gauge sensor for measuring the unit weight of a moving sliver in a textile machine, comprising a support rigidly mounted on a sliver output end of the textile machine and a trumpet carried by the support for outputting a condensed sliver. At least one strain gauge is carried by the support and responsive to strain imposed on the support by movement of sliver through the trumpet. Electrical circuit is means carried by the support in electrically communicating relation to the strain gauge, and includes a power supply and amplifier carried by the electrical circuit on the support for outputting an excitation voltage and a Wheatstone bridge for receiving the excitation voltage from tile power supply and applying the excitation voltage to the at least one strain gauge, receiving a feedback signal from the strain gauge and outputting a control signal corresponding to the weight of the sliver passing through the trumpet.

Abstract: A regulated drawing unit for drawing fiber material includes an inlet through which the fiber material passes before being drafted; an outlet through which the fiber material passes after being drafted; a first arrangement defining a drawing field including drawing roll pairs spaced from one another in a direction of advance of fiber material; a drive system operatively connected to at least one of the drawing roll pairs for setting an extent of draft of the drawing field; a programmable control system having a memory and being connected to the drive system; a sensor for determining the mass of the fiber material running through a location and for applying signals to the memory; and a second arrangement for deriving information from data stored in the memory for adjusting the roll pair. The second arrangement includes a third arrangement for forming, from the information, a spectrogram of the fiber material and for evaluating properties of the spectrogram to use such properties in adjusting the roll pair.

Abstract: The invention concerns a textile machine operating on fiber band with a feeding device for the fiber band and a guide element for the fiber band and further provided with a band monitor for the discovery of band breakage. The band monitor (BW, BW1, BW2, BW3) is placed always in the area of the guide element, in particular one band guide (BF) and another band guide element (FE, FE1, FE2, FE3) in the area of the band monitor (BW, BW1, BW2, BW3). The running time behavior of the fiber band (FB) is directly improved by the guide element (FE, FE1, FE2, FE3), that is, the vibrations of the fiber band (FB) are damped. This will avoid a situation wherein false alarm signals are given because of an originally vibrating fiber band at the band monitor.

Abstract: The invention concerns a process and a device for recording a parameter on several slivers (11) fed to a controlled drawing frame. In order to produce a more accurate measured value and at the same time influence the slivers to the smallest possible extent, several measuring elements (9) are provided which are individually assigned to the slivers and whose measured values are converted to a single measured value for the control.

Abstract: Device for processing the web of fibers obtained from a carder, by transforming it into a strip, subjecting it to drawing, and collecting it in a container, in which the drawing means consist of a plurality of drawing stations, each of which comprises two or more pairs of rollers, each of which is actuated by its own motor, and is piloted by a control unit which distributes the drawing between the stations.

Abstract: A strain gauge sensor for measuring the unit weight of a moving sliver in a textile machine, comprising a support rigidly mounted on a sliver output end of the textile machine and a trumpet carried by the support for outputting a condensed sliver. At least one strain gauge is carried by the support and responsive to strain imposed on the support by movement of sliver through the trumpet. Electrical circuit is means carried by the support in electrically communicating relation to the strain gauge, and includes a power supply and amplifier carried by the electrical circuit on the support for outputting an excitation voltage and a Wheatstone bridge for receiving the excitation voltage from the power supply and applying the excitation voltage to the at least one strain gauge, receiving a feedback signal from the strain gauge and outputting a control signal corresponding to the weight of the sliver passing through the trumpet.

Abstract: A device for controlling textile fibers floating through drawing cylinders in a combing machine comprises a plurality of drawing rollers on each of which a rubber roller is pressed, the device further comprising a stationary rod which can be applied, with an adjustable height, to the drawing cylinder assembly, and having a rod contour having a circle arch cross-section facing one of the drawing roller to press on the sliver being drawn, the rod being arranged between the second and third rubber rollers therethrough the sliver passes, the circle arch cross-section contour facing the third drawing roller.

Abstract: A fiber processing machine includes a sliver guiding device having first and second wall elements as well as first, second, third and fourth wall faces. The first and second wall faces which form part of the first and second wall elements, respectively, are oriented toward and spaced from one another to define a first gap. The third and fourth wall faces are oriented toward and spaced from one another to define a second gap. Some of the wall faces are convergent for densifying a sliver running through the first and second gaps. At least one of the first and second wall elements is stationary during operation. First and second cooperating withdrawing rolls immediately adjoin the first gap for pulling the sliver therethrough upon their rotation. The first and second withdrawing rolls define a bight into which the first and second wall faces extend. The first and second withdrawing rolls have respective first and second circumferential roll surface portions forming the bight.

Abstract: The invention relates to an apparatus for forming a sliver with a first regulated drafting arrangement (10) with several pairs of rollers (11, 12, 14) for the regulated drafting of the fibre mass (8) supplied to the drafting arrangement, with the fibre fleece (28) delivered by the drafting arrangement being joined and supplied to a measuring member (32) from where the measured fibre material is thereafter supplied to a second drafting arrangement (40) and with the autoleveller device (35, 52, 21) of the first drafting arrangement (10) intervening in a regulating manner in the drive of the first drafting arrangement (40) in order to compensate fluctuations in mass on the basis of the signals issued by the measuring member (32) by including a predetermined setpoint value.Various regulating and control devices are known in practice in order to obtain a high-quality sliver.

Abstract: A method of regulating a drafting arrangement, in which measuring signals are acquired at a feed end of the drafting arrangement, compared with a set value to provide a differential signal, and an adjusting signal for the control unit of a variable speed motor for the pair of drafting rollers is derived from the differential signal, provides reliable control results and adjustment of the sliver where a difference has been detected. Set values are entered by a transfer address from a set-point register. The basic speed is derived from actual speed of a doffer and supplied as basic voltage to the control unit of the variable speed motor. A measuring clock pulse of low frequency is generated, dependent upon a roller of the drafting arrangement. With every measuring clock pulse a measuring signal is obtained, converted into a digital signal, compared with the activated transfer address of the set-point register and a differential signal is generated.

Abstract: The invention relates to a process for rapid measurement of thickness or mass of a fiber sliver in a draw-frame or card (so-called "regulation"). The object of the invention is to accelerate the process of measuring according to the state of the art while maintaining measuring precision and even improving it. For this, a process for rapid measuring of the thickness or mass of a fiber sliver in a machine processing fiber slivers, such as a draw-frame or card, in which the primary measuring signal (u.sub.1, u.sub.1 ') of the measurement indicator is taken via a signal-influencer which modifies the primary signal by segment or point before transmission in the form of measuring signal (u.sub.2, u.sub.2 '); the modification is predetermined by a characteristic line stored previously by segment or point which is based on a relationship (K1) measured by point between defined predetermined thicknesses at the measurement indicator and the primary measurement signal (u.sub.1 u.sub.1 ') measured at that moment.

Abstract: The invention disclosed a two-head one-cubican drawing system provided with two sets of drafting mechanisms and two coilers. A cubic can is used to receive slivers from two coilers so as to decrease the space occupied by the system and facilitate the arrangement of automatic transportation. Through the control of driving mechanisms by transverse devices, evener drawing frames, and rollers the system can have two slivers equally formed in the cubic can.

Abstract: An automated drafting system particularly suitable for drafting textile strands of sliver is provided. The automated drafting system includes a synchronous drive sliver drafting roller system utilizing toothed gears in the preferred embodiment operatively connecting a pair of drafting rollers with one of the rollers being directly driven by a motor to thereby cause identical rotation of both rollers. The automated drafting system also includes a system for securing and pressuring together upper and lower sliver drafting rollers wherein the lower roller of a pair of drafting rollers is preferably maintained in a fixed but rotational position while the upper roller of the pair is pressured towards the lower roller and controllably restricted as to both horizontal and vertical movement during the drafting process.

Abstract: An automated drafting system particularly suitable for drafting textile strands of sliver is provided. The automated drafting system includes a synchronous drive sliver drafting roller system utilizing toothed gears in the preferred embodiment operatively connecting a pair of drafting rollers with one of the rollers being directly driven by a motor to thereby cause identical rotation of both rollers. The automated drafting system also includes a system for securing and pressuring together upper and lower sliver drafting rollers wherein the lower roller of a pair of drafting rollers is preferably maintained in a fixed but rotational position while the upper roller of the pair is pressured towards the lower roller and controllably restricted as to both horizontal and vertical movement during the drafting process.

Abstract: A process for direct ascertainment of setting values for point of autolevelling and/or amplification application (R, K) of a draw frame or carder with adjustable drafting of fiber sliver in which the autolevelling of the adjustable draw frame or carder is provided at least with one pilot control (10) in order to change the drafting of the fiber sliver (20) is proposed. The process accelerates optimation but not so that it may produce an inherent restlessness in the autolevelling of the draw frame. This is achieved if a function (a, b) is found through several measured values (CV1, CV2, CV3) of a quality-characterizing magnitude such as CV-value, the minimum of which (am, bm) results in an optimizing parameter such as the point of autolevelling or amplification application (R0, K0) for the autolevelling (10) of the draw frame or carder.