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 transport belt for transporting a fiber strand to be condensed through a condensing zone of a ring spinning machine is provided with a perforation for an air suction stream which suctions the fiber strand. In at least one fiber strand transporting area, the perforation has at least 100 holes per square centimeter.

Abstract: An apparatus for condensing a fiber strand, which travels through a condensing zone in an untwisted state after leaving a drafting unit, comprises an air-permeable transport belt, which transports the fiber strand over a sliding surface comprising a suction slit. The sliding surface is formed by means of the outer contour of a hollow body connected to a vacuum. The hollow body comprises in addition a pressurized chamber, which has in one area facing away from the suction slit at least one air outlet opening directed against the inner side of the rotating transport belt.

Abstract: A drafting frame for a spinning machine, especially a ring-spinning machine can be readily retrofitted with a compaction device adjacent the last pair of drafting rollers if the condensing zone is defined between a clamping location formed by the nip of the last roller pair and a clamping location formed by a number of elements of the compacting device against the upper roller of the last roller pair.

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: In a process for feeding of textile fibers supplied from a point of delivery of a textile machine to a drafting equipment which continues to process the fibers, the fibers supplied from the point of delivery are formed into a fiber sliver. They are then conveyed in the form of the fiber sliver to a drafting equipment which continues to process the fiber sliver, whereby the fibers are conveyed at least in the area before the drafting equipment by a feed mechanism and are introduced by same into the drafting equipment. In a textile machine to carry out the process, the feed mechanism is provided with a conveying channel which is located between the point of delivery and the input area of the drafting equipment and which conveys the fiber sliver. The conveying channel reaches up to the input area of the drafting equipment. The feed mechanism is provided with a drive arrangement for the conveying of the fiber sliver in the conveying channel.

Abstract: An air-permeable transport belt, drivable by a drive roller, is provided for transporting a fiber strand to be condensed over a sliding surface of a spinning machine condensing zone which includes a suction slit. The transport belt has at least one area arranged to contact the drive roller, which area differs in relation to its surface structure from an area arranged to contact the sliding surface and from an area arranged to contact the fiber strand.

Abstract: A method of operating a sliver draw unit of a spinning preparation machine includes the following steps: applying, by incremental rotary displacement sensors, signals to an electronic control and regulating device; determining from the signals the angular position and/or the rotary direction of at least one of the roll pairs of the draw unit during operation and standstill; and rotating at least one of the roll pairs into a predetermined angular position by controlling the electric motor driving that roll pair.

Abstract: A high efficiency method of producing a high quality knit fabricis diclosed. The method includes the steps of drafting a blended sliver of cotton fibers and polyester fibers in a four roll draffing zone in which the nip to nip spacing in the break zone is no more than 2.5 mm longer than the effective fiber length of the polyester fibers, and no more than 1.5 mm greater than the effective fiber length in the intermediate zone, and at least 7 mm greater than the effective fiber length in the front zone, thereafter spinning the drafted sliver into yarn at a take up speed of greater than 150 meters per minute, and thereafter knitting the spun yarn into fabric.

Abstract: A condensing zone for condensing a drafted twist-free fiber strand is arranged downstream of a drafting arrangement of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit extending essentially in a fiber strand transport direction. A perforated transport belt transports the fiber strand over the suction slit of the sliding surface. The transport belt wraps around a bottom roller of a front roller pair of the drafting arrangement and is driven by the bottom roller. The transport belt drives in turn a nipping roller, which limits the condensing zone on its exit side with a nipping point serving as a twist block. The nipping roller presses the fiber strand and the transport belt against the sliding surface of the condensing zone.

Abstract: The spinning cylinder for drafting systems comprises a cylindrical roll body (1) forming a sliding bearing together with a sliding bearing bush (3) which is slid on and axially fixed. The sliding bearing bush (3) includes a cylindrical socket (4) made of tubular plastic material or plastic compound onto which an elastomeric covering (5) has been extruded.

Abstract: A sliver supplying apparatus for simultaneously feeding a plurality of slivers to a draw frame includes an intake table; a plurality of supply rolls supported in a series by the intake table for guiding the slivers from the coiler cans to the draw frame; and an rpm-setting device for individually setting a circumferential speed of the supply rolls. The rpm-setting device includes a roll drive independent from the drive of the draw frame.

Abstract: A transport belt of a ring spinning machine for transporting a fiber strand to be condensed over a suction slit of a condensing zone is provided with a perforation or perforations for a suction air stream which suctions the fiber strand. The transport belt comprises a nonperforated area which permits a friction drive, and also an effective area containing the perforation, the width of the effective area being larger than the width of the suction slit. For example, the transport belt comprises a skeleton belt forming a supporting structure with a close-meshed woven fabric applied thereto.

Abstract: A drafting frame is provided with at least one compaction unit in which a belt with a perforation under suction serves to draw together the fibers of a drafted roving. The belt is juxtaposed with a stripper spaced from the belt to remove fiber accommodations thereon. The gap between the stripper edge and the belt is adjustable.

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 condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a drafted roving or a sliver is condensed. The condensing zone has a suction device which has a closed hollow profile and which serves as a sliding surface for a circulating sieve belt. The sieve belt transports the drafted fiber strand to a nipping roller, which presses the fiber strand and the sieve belt against the sliding surface at a nipping point. The fiber strand travels over an essentially in transport direction extending suction slit located in the condensing zone, which suction slit extends to the nipping point.

Abstract: The present invention concerns a stretch machine with a drive mechanism which is placed in a drive enclosure (3). This drive is covered by a movable top (2), which lies with its edge areas (24) on a stationary part (10) of the stretch machine and which top carries a blower (4) with at least one suction side and one discharge side. The blower stands with its suction side in connection with a filter (5) and with its discharge side open to the interior of the drive enclosure (3). Within the drive enclosure is provided an air distribution system (6). This is so arranged and so oriented that the blower (4) produces, in the entire peripheral area of the cover (2), an effect which is essentially of uniform strength. The blower 4 is provided with a control apparatus (71) for a reversal of its direction of impelling air.

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: 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: A draft free condensing zone for condensing a drafted fiber strand is provided between a front roller pair of a drafting unit of a ring spinning machine and a delivery roller pair arranged downstream thereof. The apparatus for condensing comprises an air-permeable und suctioned sliding surface which is in contact with the fiber strand, under which sliding surface is located a suction slit which is stationarily arranged and extends essentially in transport direction of the fiber strand. The sliding surface is the front surface of a rotating disc, whose rotational axle extends essentially perpendicular to the transport direction of the fiber strand.

Abstract: A textile machine is provided with drafting equipment for drafting fiber material. The drafting equipment includes a suction device disposed to remove dirt separated from the fiber material. The textile machine further includes a guiding device configured to guide fiber material into an inlet of the drafting equipment. The guiding device further includes a dirt separating device configured therewith so that dirt particles are separated from the fiber material prior to the fiber material reaching the inlet of the drafting equipment.

Abstract: When a roller cylinder of a top roller is installed, it may collide against an outer bearing and damage it. Since the roller cylinder is loosened, when drafting is executed at a high speed, the roller cylinder may vibrate, causing non-uniform drafting. A pre-loading spring 30 is installed between an inner bearing 20 and an outer bearing 21 and on the inner circumferential side. Due to the elastic force of the pressurizing spring 30, inner rings 20b and 21b of the bearings rotate integrally with a shaft 10. When the roller cylinder 12 is installed, if it collides against the outer bearing 21, the pre-loading spring 30 acts as a buffer to prevent damage to the bearings. O-rings 31 and 32 installed between outer rings 20a and 21a of the bearings 20 and 21 fill the gap to prevent the roller cylinder 12 from loosening. As a result, uniform drafting can be executed at a high speed.

Abstract: A fiber processing textile machine includes a mechanism for advancing a sliver bundle, formed of a plurality of slivers, in a travel path in a direction of sliver feed; and a sliver guiding body positioned in the travel path and having an axis of rotation and a plurality of sliver guiding surfaces disposed about the axis of rotation. The sliver guiding surfaces are of different arcuate shape as viewed perpendicularly to the direction of sliver feed. Further, a holding mechanism is provided for positioning the sliver guiding body and supporting it for rotation for orienting a selected one of the sliver guiding surfaces toward the sliver bundle, whereby the sliver bundle is contacted and guided by the selected surface.

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 drawing unit for drawing sliver includes first and second drawing roll pairs being spaced from one another in the direction of sliver advance. One drawing roll in each drawing roll pair is a driven roll.

Abstract: A drafting and spinning apparatus is disclosed that produces highly uniform yarns with improved mechanical properties. The apparatus comprises a plurality of pairs of drafting rolls for drawing a sliver formed of one or more types of staple fibers, each fiber type having a predetermined effective fiber length. The plurality of pairs of drafting rolls comprises at least two pairs of intermediate rolls, with the distances between the nips of adjacent intermediate roll pairs being no more than the effective fiber length of the longest fiber type in the sliver. The apparatus further includes device for spinning the sliver into yarn at a take-up speed of greater than 150 meters/minute.

Abstract: A spinning apparatus is disclosed according to the invention having a drafting zone comprising at least four roll pairs for drawing a sliver comprising one or more types of staple fibers. The rolls pairs include a back roll pair, intermediate roll pairs and a front roll pair and the distance between the nip of the back roll pair and the nip of the adjacent intermediate roll pair, and the distances between the nips of adjacent intermediate roll pairs is no more than the effective fiber length of the longest staple fiber type in the sliver. The drafted sliver may be spun into yarns at high speeds, such as the speeds used in air jet spinning apparatus to provide yarns having increased strength and reduced defects. The present invention also includes a method of forming high quality and high uniformity yarns by advancing a sliver through a drafting apparatus and thereafter spinning the sliver into yarn.

Abstract: In the pneumatic pressing of textile strands in a drafting frame the pressure in the pressure line is monitored by a pressure sensor and/or a flowmeter and used to control a value between the pressure source and that pressure line. According to the invention a disturbance signal is outputted when the pressure in the line drops below a threshold, the control signal for the valve exceeds a threshold, the displacement of the value member exceeds a certain level and the flow rate exceeds a value so as to indicate leakage beyond a tolerance level.

Abstract: In order to control cotton fibre fluctuation between the compactor device (5) and the drafting unit (6) within a card (1A), the drafting unit (6) can be moved (either along a rectilinear trajectory and/or along a circular trajectory) between a first position (L) coinciding with its maximum distance from the compactor device (5) and a second position coinciding with its minimum distance from said compactor device (5) until said distance is reduced to the minimum possible. The distance between the drafting unit (6) and the compactor device (5) varies in a manner inversely proportional to the operating speed of the card (1A). In an alternative embodiment:a support and guide element (40) for the web (9) is positioned between the doffer (2) and the pair of rollers (7, 8) of the compactor device (5);a conveyor device (24) is interposed between the compactor device (5) and the drafting unit (6) (FIG. 2).

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: 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.

Abstract: In the blending and spinning processes, 1/f fluctuation signals are imparted to the feed slivers or rovings, wherein the blending ratio of the blended slivers, blended rovings, or blended yarn varies with a correlation, specifically a correlation with a 1/f fluctuation.

Abstract: A compression bar for use in the main drafting zone of drafting rollers of the textile industry. The invention considerably reduces deposits on a compression bar. The fixed compression bar has a rectangular cross-section, with its narrow faces being rounded off. On the other hand, the compression bar is rotatably mounted about its longitudinal axis, whereby the compression bar has preferably a circular cross-section.

Abstract: Worsted grade all-wool of fair quality can be spun on cotton spinning system. Wool top is processed at first passage of cotton drawing frame instead of gill, with cutting and drafting with suitable distance between front and third rollers. Second and back top rollers are removed so that wool sliver which is more uniform and which has a shorter staple length distribution can be processed with roller drafting only. The second to last passage is processed with the same distance between the front and third roller as the first passage and also has the second and back top rollers removed. The sliver is fed through three (3) pairs of the rollers and one pair of aprons of a cotton roving frame, the draft is the same distance as the first passage of drawing process between front and back rollers and uses an engraved middle top roller. Yarn is spun on a cotton ring frame by drafting the fed roving through three pairs of rollers and one pair of aprons.

Abstract: A process and device for bundling a fiber composite which has been drafted in a drafting device having a pair of output rollers and a pair of delivery rollers gathers together the fiber composite leaving the pair of output rollers in a fiber bundling zone. The fiber composite is conveyed through the fiber bundling zone and supported through the fiber bundling zone on one side by a conveying plane which moves in the direction of conveyance of the fiber composite. A suction air stream is drawn through the fiber bundling zone at substantially a right angle to the conveying direction of the fiber composite. The suction air stream causes the gathering together of the fiber composite in the bundling zone at a width substantially equal to a desired width of the fiber composite.

Abstract: A process and a device for the correction of the regulation onset point and of the intensity of regulation relate to a regulated drawing frame of the textile industry, i.e. a drawing frame in which drafting can be regulated or can be changed in a controlled manner. A selected transient signal of the fiber sliver thickness starts the process for a limited time span so that, independently of the existing regulation, the response signal is detected at the drawing frame output and its difference with the input signal is evaluated in order to correct the regulation onset point and/or the intensity of regulation.

Abstract: The textile silica sliver is produced by a continuous process of the dry spinning of sodium silicate filament yarn, direct formation of sodium silicate silver by the drum drawing process, transformation to textile silica sliver in a post-treatment line, and direct winding on of the sliver. The various textile products manufactured from textile silica slivers or staple fiber yarns made therefrom are suitable for application in insulation and heat protection up to 1100.degree. C., substitute for asbestos and improve energy efficiency.

Abstract: In a textile machine with a drafting arrangement and textile spindles, the spindles are driven by an electric main drive. The drafting arrangement cylinders are coupled so that their speed is a given proportion of the speed of the main drive. The coupling is via a position-controlled brushless D.C. motor with electronic commutation for driving the drafting arrangement. An additional flywheel mass on the drafting arrangement drive is dimensioned so that the slowing-down time of the drafting arrangement is of the same order as the slowing-down time of the main drive, resulting in controlled slowing-down conditions if the voltage suddenly fails. The drafting arrangement motor can be made much smaller than hitherto. Also, the starting and slowing-down conditions can be accurately and sensitively controlled, thus reducing the risk of thread breakages.

Abstract: A process for controlling the operation of a textile draw frame wherein a plurality of fiber slivers are fed to the draw frame at a predetermined desired delivery speed includes monitoring the presence of individual fiber slivers delivered to the draw frame and decreasing the delivery speed of the draw frame if any of the monitored fiber slivers is indicated as missing from being fed to the draw frame. The process includes subsequently increasing the delivery speed of the draw frame if the respective missing fiber slivers are again indicated as being fed to the draw frame. The invention also includes a draw frame including apparatus for carrying out the controlling process.

Abstract: An apparatus for controlling a fiber processing plant including a series of processing stages in order to supply fibrous material as a product with predetermined qualities, whereby the qualities of the product can be influenced by suitable, selectively adjustable treatment of fibrous material during its passage through the plant and whereby in at least one of the intermediate stages of the plant an ascertainable quality of the product of this stage is determined. In this intermediate stage a signal is obtained which is equivalent to the ascertainable quality and which is used for controlling the previous stages.

Abstract: The combing machine has a row of combing heads which are allocated with a drive shaft extending parallel to the longitudinal direction of the row. The combing heads are provided downstream with a drafting arrangement whose cylinders are arranged horizontally and at a right angle to the drive shaft. A funnel wheel and a can plate are rotatable about vertical axes. The transmission for driving the cylinders of the drafting arrangement, the funnel wheel and the can plate has two V-drives with a crossed toothed belt each. The first V-drive connects the drive shaft to a drafting arrangement drive shaft which is parallel to the cylinders of the drafting arrangement. The second V-drive connects a shaft which is parallel to the drafting arrangement drive shaft to a vertical drive shaft for the funnel wheel and the can plate.

Abstract: Disclosed are various needle-based devices for individualizing single fibers and other entities from a fibrous mass, particularly for testing purposes. In one embodiment, an accelerated pin drafting machine has a plurality of combing elements which sequentially pierce a fiber mat and move within a drafting zone with increasing distance between adjacent combing elements. The accelerated pin drafting machine in turn feeds a fiber individualizer. In another embodiment, a comb-like needle sampler is provided which moves past a perforated plate such that portions of fibrous material protruding through the perforations are loaded onto the needle sampler. An elastomer clamping feedroll moves against the needles to clamp the sample, and then rotates to gradually feed fibers from the sampler. As an alternative to the elastomer clamping feedroll, a clamping block presses against the needles, and the needles are slowly retracted to gradually release fibers.

Abstract: The invention relates to an autolevelling draw-frame of the textile industry in which the drafting of the fiber sliver can be modified in a controlled and/or autolevelled manner. It is the object of the invention to analyze electrical signals or measured values of a draw-frame so that correction may be made on basis of these analyses. This object is attained in that additional, time-related signal analyses are conducted independently of autolevelling. They make it possible to recognize corrigible deviations within the analyzed signals as well as the establishment of appropriate correction values. If deviations exceed a tolerance, a determination is made in combination with the knowledge memory of a computer whether the deviation is due to a disturbance in the machine or whether the deviation can be explained as a logical consequence.

Abstract: A sliver of animal wool is subjected to hot drawing under its wet state to provide a slenderized fine animal wool.

Abstract: Combing machine. The combing machine includes a process control computer for the preparatory machine of a textile spinning mill, the former being located upstream of a combing machine which reacts to signals from the combing machine, which signals are representative both of the evenness of feed material supplied to a controlled drafting arrangement as well as of the comber waste share, with the computer producing a signal which is indicative of a change in the evenness behavior of the machines located upstream of the combing machine when the evenness of the feed material changes while the comber waste share remains unchanged. A method for operating the combing machine is also set forth.

Abstract: A sliver guiding arrangement for drafting units of spinning machines is provided with forcibly traversing sliver guides. Two sliver guides respectively which are assigned to adjacent slivers and which are connected in front of a wedge-shaped gap of a clamping roller pair, are connected with one another by a coupling member to form one structural member. The coupling member is driven via a driving device by a traversing rod to carry out traversing movements. The driving device, which bridges a distance between the traversing rod and the coupling member, is movable relative to the coupling member in the direction of the wedge-shaped gap. The structural member, which includes the sliver guides, is guided in parallel to the wedge-shaped gap on a sliding surface.

Abstract: This invention relates to a coiler using tongue and groove rollers preferably for measuring sliver thickness and guiding sliver emerging from between these rollers, using guide means such as a pair of calender rollers driven for rotation in the same conveying direction.Optionally the sliver between the conveying nip at the tongue and groove rollers and the guide means (when embodied as calender rollers) is severed by intermittent operation of the conveying and guiding nips.

Abstract: In the case of a textile machine comprising drafting units that are disposed next to one another, the bottom cylinders are arranged in the longitudinal direction of the machine so that they continue along several or all drafting units. The continuous bottom cylinders are disposed at several bearing points which are arranged at a spacing from one another in the longitudinal direction of the machine. It is provided, in the case of the delivery bottom cylinder, to design at least some of the bearing points such that they can be radially adjusted. As a result, radial directional deviations of the delivery bottom cylinder can be compensated which occur along its longitudinal dimension.

Abstract: A creel device for a drawing frame, having a drive train for lifting rollers for taking out slivers from respective cans. In one embodiment, the cans are divided into two groups each constructed at consecutively located cans. The drive train is divided into two sections for driving respective lifting rollers for respective groups of cans. The basic section is for driving lifting rollers for the group adjacent the draft part, and the second section is for driving lifting rollers from the group remote from the drafting part. The first section is connected to a rotating movement source in the machine frame, while the second section is connected to a variable speed motor.

Abstract: A sliver is created by directly condensing the carded web from a carding apparatus and then feeding it to a drafting set from which it is subsequently delivered by way of an autoleveller comprising sliver thickness sensing means and variable draft means.