Abstract: Method for the manufacture of formed fabric from fibrous material by means of a carder or the like, whereby the fibrous material is carded upon employment of at least two working rollers of the same diameter running in the same direction as one another, characterized in that the fibrous material is conducted over at least three working rollers residing in mutually adjustable engagement with one another, being conducted thereover under adjustable, partial return storing; also a carder for the implementation thereof.

Abstract: An apparatus includes a fiber tuft feeder with discharge rollers for delivering a fiber tuft mass; a drive motor connected to the discharge rollers; a feeding device arranged for advancing fiber material obtained from the tuft feeder; and a textile processing machine having an input arranged to receive fiber material from the feeding device. An opening roller forms part of the tuft feeder and is arranged downstream of the discharge rollers for receiving fiber material from the discharge rollers and to advance fiber tufts. Devices produce a loose fiber tuft mass from the fiber tufts delivered by the opening roller, form a thin fiber lap from the loose mass and advance the fiber lap to the feeding device. A sensor is situated upstream of the textile processing machine for detecting fluctuations in quantity characteristics of the advancing fiber lap, and a transducer is connected to the sensor for generating electric signals representing the fluctuations.

Abstract: An apparatus for forming fibre webs including a first component and a second component in the form of two textile fibres differentiated by their average fibre length or a textile fibre and wood pulp, said apparatus including a card means having a discharge zone, means for feeding said second component to said discharge zone, and means for condensing the fibres in said discharge zone whereby a highly uniform fibre web is obtained.

Abstract: An installation for pneumatically supplying fiber material to a plurality of carding machines arranged for simultaneous operation includes a plurality of card feeders, each being operatively connected to a separate carding machine. Each card feeder has a feed chute delivering fiber material to the carding machine associated therewith and a reserve chute delivering fiber material to the feed chute associated therewith. The installation further has a common transport conduit connected to the reserve chute of each card feeder and a fan contained in the common transport conduit for advancing fiber material by an air stream to the card feeders and a control arrangement for varying the flow rate of the fiber material in the common transport conduit as a function of at least one operational parameter of the installation.

Abstract: Fiber material is conveyed over a sieve-like surface to remove dust from material. The fiber material is thereby exposed to a suction airstream which is guided through the sieve-like surface and which is guided away from the fiber material at an acute angle which is formed opposite to the fiber transport direction. The fiber material may be aligned in parallel before it is exposed to the suction airstream. In order to orient the suction airstream at the desired acute angle relative to the fiber transport direction, the fiber material is guided over sieve orifices which are inclined at the acute angle opposite to the fiber transport direction.

Abstract: An apparatus for feeding a fiber lap to a card, includes an upper reserve chute having an upper end through which fiber material is introduced into the apparatus, a feed roller situated at a lower end of the reserve chute and arranged for withdrawing fiber material therefrom; a feed chute having an upper end situated adjacent to the lower end of the reserve chute; and an opening roller situated in a space between the lower end of the reserve chute and the upper end of the feed chute. The opening roller is arranged under the feed roller to receive fiber material therefrom and to advance the fiber material into the feed chute through the upper end thereof.

Abstract: A transport duct for fiber flocks and similar fibrous material communicates via a plurality of openings with a corresponding plurality of feeding chutes leading to flock-processing equipment, such as carding machines. The duct includes at least one, but preferably more than one, duct section at which the duct undergoes an abrupt change of direction by between 70.degree. and 110.degree., so that the fibrous material which is carried through the interior of the duct by a transport medium is slowed down by contact with the duct and then descends more abundantly than otherwise into the chute that immediately follows such section as considered in the direction of flow of the transport medium. The presence of the section or sections with abrupt direction change also makes it possible for the duct to circumvent any obstructions which may be present between the individual chutes at the location of use of the duct, thus permitting optimum utilization of available floor space.

Abstract: In a chute feed apparatus for carding engines, cards and like machines, there is disclosed means for changing the widthwise configuration of sheet material being fed and exiting the apparatus by changing the deformation of a constituent wall of the delivery chute shaftway. This wall has a deformable member and displacement devices and holding members which deform the wall's shaftway contours responsive to the density or thickness of the sheet material exiting so as to provide sheet material with a desired contour widthwise.

Abstract: A web weight control system and method are disclosed wherein the actual weight of fibers supplied to a carding machine (36) are measured in a static condition in a weight pan (20). The supply roll (14) is controlled by computer (A) to supply a preset weight of fibers to weight pan (20). The weighed fibers are supplied to an apron feed (22) and to a pneumatic delivery system (28). Apron feeder (22) may be adjusted by adjusting the speed of an apron feed roll (50a). To maintain the fiber in a storage chute feed (32). Pressure sensed by a pressure gauge (52) is used to indicate quantity of fiber in chute feed (32) and pressure signal (53) is fed to computer (A) for control of delivery roll (50a). Card feed roll 62 which feeds fibers in the form of a batt (35) from chute feed (32) to the carding machine is controlled by computer (A) in synchronization with the speed of the carding machine as sensed by doffer roll (68).

Abstract: Apparatus and methods for controlled application of aeromechanical and electrodynamic release and separation forces to foreign particulate matter in fiber materials are disclosed. A number of elements are employed in various combinations. One important element is a perforated, pinned cylinder which facilitates foreign particulate matter removal and microdust classification and use of conditioned and controlled airflow for optimum fiber processing and foreign matter removal. Another important element is a counterflow slot. Other important aspects are air blast cleaning of a tenuous mat held onto a preforated cylinder; unidirectional and pulsating airflows to cause repeated engagement of fibers with static cleaning pins and to release additional dust; application of electrostatic release forces to particles bound onto the fiber; and the processing of fiber in properly conditioned inlet air to the machine, as opposed to ambient air.

Abstract: A control system and method for controlling the rate (Y) of fiber input (24) into a delivery system (28) in response to sensed fiber quantity (56) is disclosed. The control system generates a step control signal (C,D) in response to first deviations about a prescribed fiber quantity condition (1 or 1,2). Deviations of small magnitude caused by various fiber delivery conditions, i.e. fiber opening, duct friction, etc., are taken into account without overreacting to the variation. In response to deviations outside the range of the first deviations, an integrated ramp signal (E, F or 128, 124) is produced which automatically seeks a new level of fiber input rate. Such deviations are normally caused by changes in system requirements such as the changing consumption and production requirements of an associated carding machine (48) to which fibers are fed from a chute feed (42).

Abstract: A relatively heavy sliver creel frame is suspended from an overhead support by relatively stiff wires whose angle to the creel in combination with the weight of the creel minimize horizontal creel sway. A pair of additional stabilizing links connect the creel to and cantilever it from a support structure spaced from the floor region over which the creel is suspended.

Abstract: Apparatus and method for forming a uniform fiber column in a chute feed (A) which includes an entrance opening (34) in a reserve section (30) of the chute at which an inclined air deflection vane (42) is pivoted for deflecting the incoming fiber-laden airflow downwardly in nonturbulent, uniform flow paths. A fiber column (F) with a level top surface (43) is provided along the entire length (L) of the reserve chute (40). An adjustable width throat (B) in the reserve chute compacts and shapes the fibers into a fiber column having a desired form avoiding fiber drag down the chute walls. The adjustable throat includes a pair of longitudinal movable wall elements (66, 68). The wall elements may be adjusted and fixed in position to provide a throat cross-section having a desired width (W) or shape depending on the type fiber being fed.

Abstract: A control system for a textile chute feed is disclosed which includes first and second fiber quantity signals generators (A, B) which generate first and second fiber quantity signals (52, 54) proportional to sensed fiber volumes in chute (16). A fiber delivery weight signal generator (C) generates a delivery weight signal (60) proportional to the delivery weight of the fibers in the fiber batt (44). A delivery roll signal generator (D) generates a signal proportional to the rotational speed of the delivery roll (38). The fiber quantity signal (52) is integrated with a delivery roll signal (68) in a first controller device (70) to produce a feed roll control signal (71). The delivery weight signal (60) and the delivery roll signal (68) are integrated in a controller (74) to produce a control signal (75) which controls the oscillation of an oscillating fiber compaction plate (28).

Abstract: An apparatus for feeding a fiber lap to a card, includes opening roller arranged under the feed roller to receive fiber material therefrom and to advance the fiber material into the feed chute through the upper end thereof. There are further provided delivery rollers at a lower end of the feed chute for withdrawing fiber material therefrom as a fiber lap; and an air circulating arrangement for guiding a compressing air stream to a location bounded by the opening roller and then introducing the compressing air stream into the feed chute through the upper end thereof, driving the air stream through the feed chute to compress fiber material therein and withdrawing air from openings in a lower portion of the feed chute.

Abstract: A rapidly reacting measuring element is used at the delivery of the drafting zone on autolevelling drawframes used in the textile industry, which makes it possible to superimpose on the signal thus obtained from the measuring element by means of an electronic system a further measurement signal at the delivery of the drawing passage and thus correct the parameters governing the drafting values in such a way that even short-term variations in cross-section of the textile material are levelled out. The critical factors here are especially the delay time T of the textile material between the correcting element (pair of drafting rollers with variable speed of rotation) and the measuring element and also the overall amplification V of the measurement signal.

Abstract: An arrangement for pneumatically transporting fiber material flocks through respective chutes to individual carding machines includes a duct which bounds an internal passage that communicates with the chutes, the chutes extending downwardly from the duct. A plurality of control elements is arranged in the passage, respective two of such control elements being situated between each adjacent two of the chutes. Each of the control elements has a substantially plate-shaped control member which is pivotally mounted at the bottom region of the duct, and a block member that extends substantially at a right angle to the control member remotely from the pivot axis and extends toward and into the respective chute. The control element can be pivoted into and arrested in any selected pivoted position, including a closed position in which the block member thereof substantially completely prevents the flow of the transporting medium past the same.

Abstract: An arrangement for continuously determining the density of an elongated strip-shaped web of fiber sliver in the course of a spinning process in order to generate control signals for use in controlling the operation of machine elements operative for equalizing the distribution of the fiber sliver includes two of stepped rollers which together delimit, at a their nip region, a confining space for the passage of the fiber sliver web therethrough. One of the rollers is mounted on a support for rotation about a stationary axis and is driven in rotation, while the other roller is mounted on the support for free rotation about another axis which is parallel to the stationary axis and defines an imaginary plane therewith, as well as for movement along the imaginary plane against a spring force away from the one roller, so that the fiber sliver is compressed and moves the other roller to a greater or lesser degree away from the one roller as it passes through the confining space, depending on its density.

Abstract: An improved cleaning device for textile fibres is provided comprising at least one carding drum and a taker-in cylinder or drum in tangential arrangement with a lower peripheral portion of the carding drum, the taker-in drum having cooperatively associated therewith means for feeding textile fibres thereto for subsequent delivery to the carding drum for further treatment thereof. The improvement resides in employing at least a pair of first and second cleaning cylinders tangentially located at a lower peripheral portion of the taker-in drum, the first cleaning cylinder being tangentially associated with the second cylinder.

Abstract: Apparatus and methods for controlled application of aeromechanical and electrodynamic release and separation forces to foreign particulate matter in fiber materials are disclosed. A number of elements are employed in various combinations. One important element is a perforated, pinned cylinder which facilitates foreign particulate matter removal and microdust classification and use of conditioned and controlled airflow for optimum fiber processing and foreign matter removal. Another important element is a counterflow slot. Other important aspects are air blast cleaning of a tenuous mat held onto a perforated cylinder; unidirectional and pulsating airflows to cause repeated engagement of fibers with static cleaning pins and to release additional dust; application of electrostatic release forces to particles bound onto the fiber; and the processing of fiber in properly conditioned inlet air to the machine, as opposed to ambient air.

Abstract: A method and apparatus for straightening fibres in a sliver comprises subjecting the sliver to sliding frictional contact with a foraminous surface through which an airflow passes, the sliding contact having the effect of both straightening the fibres in the sliver to orientate them, and straightening the hooked ends of any fibres in the sliver, and the influence of the airflow serving to remove dust and/or trash from the sliver.

Abstract: In a webformer including a chute for feeding a web of fibers to subsequent equipment the improvement comprising an air deflector plate for controlling the amount of air that can be exuded from substantially all areas of a perforated wall.

Abstract: Apparatus for removing excess fibers from the doffer of a sliver high pile fabric knitting machine and returning the fibers to the main cylinder for refeeding to the doffer. During the return of the fibers to the main cylinder, they are combed and aligned into a thin uniform film of parallel fibers for uniform redistribution on the main cylinder and uniform mixture with fresh, incoming fibers fed to the main cylinder by the sliver feed elements. The invention includes pneumatic suction for drawing fibers from the doffer into a substantially closed suction chamber, a flat perforated filter sheet fixed within the chamber to separate the fibers from the air currents in the chamber and a rubber covered sealing roll permitting the fibers to be discharged from the chamber to the ambient atmosphere without impairing the integrity of the vacuum in the chamber.

Abstract: A feeding and opening device for open-end spinning machines is disclosed with a feeding table cooperating with a feeding roller and containing a fiberbeard support that is opposite the opening roller. The feeding table with fiberbeard support is held so that it can be swivelled from its operating position into a cleaning position. The swivelling can be carried out manually or by means of an adjusting element of an automatic servicing device. By means of the swivelling-away of the feeding table, the support surface of the fiberbeard support is exposed so that it can be cleaned in order to remove sticky components, such as honey dew or similar components.

Abstract: A chute feed means comprising upper and lower chutes intercommunicating through channelways between guide walls and a feed roller and a beater roller provides virtual elimination of stressing constituent fibers on the flock being processed by obviating all reversals in direction of movement of the flock through the chute feed means. This is the result of causing the feed roller and the beat roller to be rotated in opposite rotational senses to one another and by positioning the roller axes and guide walls such that the flow of flock through the intercommunicating channelways is made almost laminar.

Abstract: A fibre metering arrangement comprises a supply conveyor carrying fibre to a weighplate, and a nip roller arrangement removing the fibre from the weighplate, and being sufficiently spaced from the weighplate so as not to cause the fibre to accumulate over the weighplate. If the gap is such that some fleece might sag, a bridging plate or a take-off conveyor can be inserted. Preferably, there is a draft between the supply conveyor and the take-off conveyor or nip rollers.

Abstract: In the present invention, a plurality of fixed flats are disposed in juxtaposition to one another, and an opening 5 to 33 mm wide is formed between each pair of adjoining fixed flats, in such a manner that the dust is entrained in the discharge air current produced at the upstream side of the opening and extracted out of the opened fiber mass.

Abstract: In a carding apparatus, a precarding area is provided with two lickerin cylinders having a nip area between them in which is disposed a dihedric body having an edge projecting toward the nip between the cylinders which controls the passage and transfers of the fibers from one cylinder to the adjacent cylinder while removing short staple fibers and other impurities from the web; the body is pivotally mounted to provide a clearance between its inner surface and the surface of the second cylinder through which the impurities pass to be discarded from the carding device.

Abstract: A method of regulating fiber quantities supplied to a fiber processing machine of a fiber processing line. The latter includes a fiber storing apparatus connected downstream of the fiber processing machine and receives processed fiber therefrom. The fiber processing machine includes a feed roller supplying fiber thereto. The method comprises the following steps: continuously rotating the feed roller by a regulatable drive during operation of the fiber processing line; generating a measuring value representing momentary fiber quantities in the storing apparatus; generating an analog electric signal representing the measuring value; and applying the analog electric signal to the regulatable drive of the feed roller for varying the rpm thereof as a function of the fiber quantity in the storing apparatus.

Abstract: Apparatus and method for removing excess fibers from the doffer of a sliver high pile fabric knitting machine and returning the fibers to the main cylinder for refeeding to the doffer. Upon the return of the fibers to the main cylinder, they are combed and aligned into a uniform layer of parallel fibers for uniform redistribution on the main cylinder and uniform mixture with fresh, incoming fibers fed by the sliver feed elements. The invention includes pneumatic suction for drawing fibers from the doffer into a substantially closed suction chamber, a rotatable filter roll within the chamber, which separates the air and the fibers and discharges the fibers from the chamber, and a sealing roll permitting the fibers to be discharged from the chamber without impairing the integrity of the vacuum therein. Fiber feeding elements composed of a rotatable wire-covered fiber return feed roll and a cooperating fiber feed plate return the recovered fibers to the main cylinder.

Abstract: Textile fibers are blended by introducing them in a pre-blender; performing an at least two-fold doubling of the textile fibers in the pre-blender; pneumatically introducing the textile fibers in a principal blender from the pre-blender; performing a multiple doubling of the textile fibers in the principal blender; and removing the textile fibers from said principal blender.

Abstract: An electronic control system for a machine which forms fiber material into a length of silver which is delivered into a storage can, and which includes a carding cylinder, a feed roller for supplying fiber material to the cylinder, a doffer for removing a web of carded fibers from the cylinder and means for removing the carded fibers from the doffer and forming them into the length of fibers. The system includes monitoring devices for monitoring the operation of the machine, controllable regulator devices connected for controlling the operating speed of at least one of the doffer and feed roller, and a microcomputer connected to the monitoring devices and the regulator means for controlling the regulator devices.

Abstract: A feeding device for flocculent fiber material, e.g., cotton, synthetic fibers, etc., to processing machines, such as carding engines, etc., including an inlet which feeds fiber material through an intake roller and an opening roller into an inlet end portion of a duct, the duct having an outlet end portion at which are located take-off rollers for feeding the fiber material from the duct, the opening roller having a width corresponding to the predetermined width of the duct inlet end portion, and a transverse air current blower extending the predetermined width of the duct inlet end portion and the opening roller, the transverse air current blower being positioned above the duct inlet end portion and having an outlet directed downwardly into the duct inlet portion, and the transverse air current blower being operative at low air pressures and high air throughput.

Abstract: An apparatus for removing waste from a card has a circulating perforated component supported spaced from the licker-in in the lower zone thereof; a vacuum generator connected with the inside of the perforated component for drawing air through the perforated component; and a connecting chamber extending from an opening in the lower zone of the licker-in to the perforated component for providing a passage of air and waste drawn by the vacuum.

Abstract: A spinning preparation system and method for air-conditioning the same wherein a spinning preparation system having a plurality of fiber processing machines connected together defines a continuous fiber transportation path. An air-conditioning system is provided which is connected in such a manner that conditioned air is delivered directly to the fiber transportation path.

Abstract: Carding apparatus and method is disclosed wherein a plurality of lickerin rolls are provided for use with a combination card screen and plenum providing trash removal points so spaced as to provide, together with multiple carding locations, more even carding with less broken fibers and improved trash removal.

Abstract: An apparatus for producing a fiber lap includes a generally vertically oriented feed chute in which fiber tufts are introduced at the top and from which a fiber lap is discharged at the bottom. There is provided a movable wall element for varying an effective width of the feed chute for altering the width of the fiber lap produced by the apparatus.

Abstract: Carder for manufacturing non-woven formed fabric from fibrous substances comprising a plurality of principal rollers and workers and clearers working with said principal rollers, comprising a draw-in roller (1) and a licker-in (2) running in the same direction and with high drawing, comprising a first principal roller (3) running in a direction opposite the licker-in (2) and with low drawing, comprising at least one pair of rollers consisting of a worker (4) and a clearer (5) cooperating with said first principal roller (3), and comprising a first matting roller (8) running in the same direction as said first principal roller (3) and with low crushing or with low drawing, whereby the draw-in roller (1), the licker-in (2), the principal rollers (3, 9), the matting rollers (8, 12), the doffing cylinders (13, 18) and the second crushing cylinders (15, 20) are driven by respectively separate, independently controllable motors such that a change of the speed of the principal roller (3) effects a change of the spee

Abstract: A chute feed having a vertically extending chute for collecting and densifying fiber therein, the chute being formed by a plurality of fixed, imperforate walls, and a perforated wall portion mounted adjacent the lower end of the chute for oscillating movement about a horizontal pivot shaft. Pressurized air is forced downwardly through the collected fibers in the chute and is discharged through the perforated wall portion, thereby densifying the fiber. The oscillating movement of the perforated wall portion results in the upper and lower ends thereof being alternately moved toward and away from the collected fiber to alternately compress such fibers and then release such fibers from the holding effect of the air passing through the perforated wall.

Abstract: An apparatus for making a web of fibers has an upright and horizontally elongated supply duct having an upper end, an open lower end, and a foraminous side wall. Fibers are fed to the upper end of the supply duct so that they descend in this duct as a ribbon-shaped web. An upright and horizontally elongated forming duct has an upper end receiving the fiber web from the supply duct, a lower end, and a foraminous side wall. Gas is made to flow down in the ducts and through the foraminous side walls thereof to shape the web and advance it to the respective lower ends. Rollers are provided at the lower end of the forming duct for withdrawing the web therefrom. One or more sensors measure the thickness of the web at a plurality of sensing locations spaced transversely along the web downstream of the lower end of the forming duct. Respective individually operable flow-adjusting means can vary the gas flow in one of the ducts at respective zones spaced transversely across the web like the sensing locations.

Abstract: Method and apparatus for processing textile materials and, in particular, controlling the density of fiber in a carding system. A fiber feeder is provided which includes a blower and an oscillating plate, both of which act to compress fiber collected in the chute of the fiber feeder. A first sensing device is utilized at the discharge of the fiber feeder to sense the density of the batt being fed therefrom to a card, and a second sensing device is utilized at the trumpet of the card to sense the density of the fiber which forms the sliver in such trumpet. Control means is provided to regulate the operating speed of the blower and the oscillating plate in response to the signals generated by the first and second sensing devices.

Abstract: A fiber transfer system for feeding fibers to the needles of a sliver high pile fabric circular knitting machine, in which the width of the fiber transfer path from the feed rolls to the needle line at the doffer is constant. Adjustable sliver entrance guides accurately direct the roving into the feed rolls and determine the location and width of the fiber transfer path. A continuous film of fibers of selected width and uniform density is transferred from the feed rolls via the main cylinder and doffer to the knitting machine needles. The main cylinder preferably is of a greater axial width than the doffer. It is covered by a narrow, elongated strip of wire-covered clothing wrapped helically around its periphery. The doffer is enveloped by straight wound card clothing, preferably constituted of a rectangular segment of wire-covered clothing having its opposite ends abutting on the doffer. The invention maximizes utilization of the fiber transfer area available to the knitting machine.

Abstract: An apparatus for regulating fiber quantities supplied to a textile machine as a fiber layer, comprises a sensor device for mechanically sensing thickness variations of the fiber layer at a plurality of locations along the layer width and emitting individual mechanical signals representing the magnitude of thickness variations at each location, a transducer arrangement connected to the sensor device for converting each individual mechanical signal into an individual electric signal, a signal adder connected to the transducer arrangement for combining the individual signals into a joint electric signal, a regulator arrangement connected to the signal adder for comparing the joint electric signal representing an actual value with a predetermined desired value of fiber layer thickness for generating a setting signal, a fiber layer delivery device, and a setting device connected to the regulator arrangement and the fiber layer delivery device for controlling the setting device by the setting signals, whereby fiber

Abstract: An apparatus for forming a lap from fiber tufts has a generally vertically oriented feed chute having upper and lower ends; a mechanism disposed at the upper end for introducing fiber tufts into the feed chute; a mechanism at the lower end for discharging a lap from the feed chute; a mechanism for maintaining, in the feed chute, an air stream flowing downwardly in the direction of the lower end; and apertured separating walls bounding the feed chute along a vertical length portion thereof for providing an exit for the air stream from the feed chute. Each separating wall has a plurality of parallel-spaced, vertically extending slots and webs in an alternating sequence. The separating walls are in a parallel, face-to-face relationship and are spaced from one another by a distance less than the expected smallest size of the tufts.

Abstract: A regulating apparatus for obtaining a uniform sliver delivered by a carding machine includes an rpm setter connected to a roller drive of the carding machine for determining an operational speed for the drive, a signal generator for producing a first signal as a function of actual properties of the sliver and a PI-regulator having a component determining a regulating time constant. The PI-regulator is connected to the signal generator for receiving the first signal and for generating a second, regulating signal. Further, the PI-regulator is connected to the drive for applying the second signal thereto. A regulating time constant setter is operatively connected to the component which determines a regulating time constant. The rpm setter and the regulating time constant setter cooperate for adjusting the regulating time constant setter as a function of adjustments of the rpm setter, whereby the regulating time constant of the PI-regulator is varied as a function of the rpm of the fiber-engaging roller.

Abstract: Apparatus for forming fiber material into a length of sliver.

Abstract: Apparatus for separating impurities from fiber material, composed of: a cylinder provided on its circumference with clothing and connected to be rotated in a selected direction for gripping and transporting fiber material, a feed device disposed for feeding fiber material containing impurities to the cylinder, the feed device cooperating with the cylinder to define a feed path presenting a constriction at the location of the cylinder, a blocking element disposed in the path at the location of the constriction opposite the cylinder, and elements for delivering a stream of air and filter material along the path toward the constriction to be intercepted by the blocking element, while the cylinder is rotating, for causing the fiber material to be gripped by the clothing, and causing the air and impurities removed from the fiber material to flow through the blocking element and to be carried off from the region of the constriction.

Abstract: An apparatus for forming a fiber lap to be processed by a carding machine includes a generally vertically oriented feed chute having generally parallel and vertically oriented front and rear walls. The chute has an opening at the top for receiving fiber tufts and an opening at the bottom for delivering a fiber lap. An air stream is introduced into the chute for flow in the direction of the bottom thereof. Air exit openings are provided in the zone of at least one of the walls allowing the air stream to leave the feed chute. The depth of the feed chute measured horizontally at the height level of the air exit openings varies along the chute width, whereby a fiber lap of varying thickness along the lap width is produced.

Abstract: A chute feed having an opening roller and a vertical chute therebeneath for receiving and collecting fibers, the chute having one generally vertical side wall formed with an area of perforations extending above and below the normal level of fibers collected in the chute, and a blower for generating an air current around the upper portion of the opening roller and toward the perforations to entrain fibers leaving the roller and to assist in equalizing the level of fibers collected in the chute. A fiber level sensing device is provided adjacent the area of wall perforations to control the flow of fibers from the opening roller to the chute.

Abstract: A method and apparatus is disclosed for producing high quality fibrous webs at high rates of speed. Fibers are fed to a rotating lickerin for opening, then to a rotating card cylinder for individualizing, and are then doffed into an air stream from which the fibers are condensed, as on a moving foraminous belt.