Abstract: In order to avoid the need for providing expensive fine rovings, a process is proposed in which two rovings are supplied to respective ring spinning stations (3). A common primary roving (2) is drawn and is subsequently divided into two separate rovings (2a, 2b) for feeding respective ring spinning stations (3). The primary roving (2) is divided into two separate rovings (2a and 2b) by conveying means (11), which comprise two juxtaposed suction zones (12a, 12b), which extend in the direction of conveyance.

Abstract: An apparatus for making a non-woven fabric comprises a plurality of tooth-carrying carding drums, which rotate in the same sense and succeed each other in the direction of travel of the preliminary web. Each carding drum which succeeds another in the direction of travel of the preliminary web constitutes a worker roller for the next preceding carding drum. The fibers flow off from the carding drums in discharge ducts and are deposited on a collecting surface, to which suction is applied. In order to ensure a uniform deposition of the fibers on the collecting surface, each discharge passage is provided adjacent to its boundary walls with an air inlet opening, which extends throughout the width of the collecting surface and is constituted by an air-entraining injector nozzle, which is directed toward the collecting surface and discharges an air stream which is parallel to the boundary wall.

Abstract: An apparatus for making a yarn consists of at least one ring spinning mechanism and a drawing mechanism, which precedes the ring spinning mechanism and defines at least one draft path for drawing a fibrous roving and includes two delivery rollers defining a clamping nip for the drawn roving, wherein one of said delivery rollers constitutes behind the clamping nip a guiding surface for deflecting the drawn roving. In order to increase the strength of the yarn, it is proposed that the delivery roller which constitutes the guiding surface for deflecting the roving constitutes at least near the delivery end of the guiding surface a slideway for guiding the roving transversely to its axis as the roving is twisted between the ring spinning mechanism and the drawing mechanism.

Abstract: For use in the making of slivers from a lap, an apparatus is proposed which comprises a plurality of tooth-carrying carding drums (3, 4, 5, 6), which succeed each other in the direction of travel of the lap. Each carding drum (4, 5, 6) which succeeds another constitutes a worker roller for cooperating with the preceding carding drum (3, 4, 5). The fibers which fly from the carding drums (3, 4, 5 and 6) into ejection ducts (10) are deposited in the form of strips on a collecting surface (7), to which a vacuum is applied only in zones.

Abstract: An apparatus for making a yarn (6) comprises two juxtaposed, closely spaced apart twisting drums (1, 2), which rotate in the same sense and between themselves define a generally triangular twisting space (4), to which a vacuum is applied, fiber-feeding means and withdrawing means (7) for withdrawing the yarn (6) which has been formed in that the fibers fed to said twisting space have been twisted together in said twisting space.

Abstract: In the making of a yarn, a stream of drawn core fibers (17a) is twisted in a triangular twisting space (4) between two juxtaposed, closely spaced apart twisting drums (1, 2), which are rotated in the same sense, and covering fibers are wound about said stream of fibers in said twisting space. To make said yarn from a single roving (17), the drawn roving (17) is fed to the twisting space (4) on the circumference of a feed roller (8), to which a vacuum is applied, the roving which has been fed on said feed roller is divided into two streams of fibers (17a, 17b) before reaching the twisting space (4), one (17a) of said streams of fibers is intended to constitute the core of the yarn to be made and is moved on the feed roller (8) as far as to the twisting space (4), and the other (17b) stream of fibers consists of the covering fibers and is detached from the feed roller (8 ) and its fibers are caused to fly freely into the twisting space (4).

Abstract: Apparatus for making a fibrous web comprises a plurality of carding drums (3, 4, 5, 6), which closely succeed each other in the direction of travel of the feed web and rotate in the same sense. An air-permeable collecting surface is provided, on which the fibers of the feed web are deposited which fly from the carding drums (3, 4, 5, 6). Each carding drum (4, 5, 6) which succeeds another (3, 4, 5) in the direction of travel of the feed web constitutes a worker roller associated with the preceding carding drum. In order to increase the permissible speed of travel of the feed web, an additional worker roller (20) and a clearer roller (21) are associated with each carding drum (3, 4, 5, 6) on that side thereof which is remote from the collecting surface (7).

Abstract: Apparatus for making a yarn comprises a device which succeeds a drawing frame and serves to twist a drawn roving and to wind covering fibers around the drawn roving, and means for supplying the covering fibers. In order to ensure that the covering fibers can be uniformly wound around the roving in a structurally simple apparatus, two spaced apart, coaxial twisting members are provided as well as a ring, which is disposed between and coaxial to the twisting members and serves to supply the covering fibers. Air is sucked from a portion of the periphery of the ring, which can be driven to rotate in the same sense as the twisting members but at a different surface speed. The line of yarn formation extends on the receiving twisting member and the ring to the delivering twisting member along a helix, which has a hand in the sense of rotation of the twisting members.

Abstract: A fibrous feed web is delivered by a feeder to tooth-carrying carding drums, which rotate at a surface velocity which causes the fibers to flow off under centrifugal force to fly onto a continuously moving, air-permeable collecting surface, which is subjected to suction. In order to make a uniform fibrous web with simple structural means even at a high throughput, the carding drums are closely spaced apart in the direction of movement of the collecting surface and each carding drum which succeeds another carding drum in the direction of movement of the collecting surface constitutes a working roller for such preceding carding drum.

Abstract: Apparatus for making a high-strength yarn from a drawn roving comprises a twisting device for twisting the roving is as well as a separate winding device, which serves to wind protruding fiber ends around the roving and comprises a guide gap which is tapered transversely to the direction of travel of the roving in said gap and is bounded by sliding surfaces in contact with the roving.

Abstract: Apparatus for manufacturing a yarn comprises two juxtaposed closely spaced apart suction drums, which rotate in the same sense and have confronting suction zones for producing a suction flow. This pulls the yarn more deeply into the triangular space between the suction drums. A drawing frame for drawing a roving that is to be pulled through the triangular space between the suction drums is disposed near one end of the suction drums. To permit the manufacture of a strong yarn without a supply of covering fibers, the two suction drums are provided with peripherally extending, confronting annular zones for roughening the roving and pulling ends fibers out of the roving. These annular zones are axially spaced from that end of the suction drums from which the yarn is withdrawn.

Abstract: Apparatus for making a yarn comprises two juxtaposed, closely spaced apart suction drums which rotate in the same sense and a delivery duct which protrudes into the triangular space between the suction drums and has an exit adjacent to the suction zones and serves to deliver through said exit singled covering fibers to a drawn roving, which has been delivered by a drawing frame disposed to said triangular space at one end thereof. The yarn thus formed in the triangular space between the suction drums is withdrawn by withdrawing means disposed from said triangular space at the other end thereof. In order to improve the wrapping of the roving with the covering fibers, the surfaces of the suction drums are rough and have a microstructure which will prevent a positive coupling to individual covering fibers and has a peak-to-valley depth up to one-half of the yarn diameter.

Abstract: In apparatus for making a yarn, two closely juxtaposed suction drums are rotated in the same sense and have suction zones which define a generally triangular space. A drawframe supplies a roving to one end of said triangular space. Withdrawing means are provided for withdrawing a yarn formed from said roving from the other end of said triangular space. Means are provided for supplying covering fibers to a predetermined length zone of said triangular space in a direction which is transverse to the axes of said drums so that said covering fibers cover said roving. To improve the twisting of the roving, means for twisting the roving are provided between the drawframe and said predetermined length zone of said triangular space.

Abstract: Apparatus for manufacturing a yarn comprises two juxtaposed, closely spaced apart vacuum drums, which rotate in the same sense and have vacuum zones that adjoin the triangular space between the drum. A drawing frame delivers a drawn sliver at one end of said drums to said triangular space, in which the sliver is twisted to form a yarn, which is then withdrawn by means provided at the opposite end of the drums. To ensure a uniform quality of the yarn and to enable the yarn to be withdrawn at high speed, at least one additional roller drawing frame is provided, which has a delivery end disposed over the triangular space and can be operated to deliver wrapping fibers in the form of at least one stream of drawn fibers moving transversely to the longitudinal direction of the drums to the sliver, which extends in the longitudinal direction of the drums.

Abstract: Juxtaposed, closely spaced, first and second drums are provided, one of which is approximately as large as the other. Said drums define between them a triangular space adapted to receive textile fibers approaching on one side of said drums in a freely flying state. Suction-exerting means are provided only in said first drum and operable to subject said fibers in said triangular space to suction. Said first drum has a suction zone adjoining said triangular space and communicating with said suction-exerting means. Said second drum has a structured outside peripheral surface. The first and second drums are operable to rotate in the same sense so that said first drum revolves away from said triangular space and said second drum revolves toward said triangular space on said one side of said drums so that said fibers received in said triangular space and subjected to suction therein through said suction zone are twisted together to form a yarn when said first and second drums are thus rotated.

Abstract: Two closely spaced apart, perforated suction drums are provided, which have parallel axes and confronting peripheral surface portions defining between them a region which is triangular in cross-section and adapted to receive fibers flying through a flight region which precedes said triangular region in a direction that is transverse to said axes. Suction means are operable to provide a suction zone in each of said confronting peripheral surface portions. Said drums are operable to rotate in the same sense so that fibers received in said triangular region and attracted to said suction zones by the operation of said suction means are twisted together by said drums to form a yarn. Yarn-withdrawing means are operable to withdraw said yarn from said triangular region toward one end thereof while holding said yarn against rotation. A throwing member is operable to move in said flight region toward said one end thereof in a plane which is transverse to said direction.

Abstract: A composite yarn is spun in a tapering gap between two suction drums which define suction zones adjoining the gap and facing each other. A yarn core is supplied to the gap between the facing suction zones from a bobbin at one end of the gap and flying fibers are supplied into the gap between the facing suction zones. Yarn drawoff rolls at the opposite end of the gap withdraw spun yarn while holding it against rotation, the flying fibers being twisted and wound around the yarn core in the gap between the facing suction zones to be spun into the composite yarn when the drums are rotated in the same sense.

Abstract: A machine for spinning textile fibers comprises a carding drum with a toothed surface which generates a cylinder during rotation, a mechanism for feeding a roving or sliver of the textile fibers to the carding drum for disintegration thereon and a spinning station arranged to receive the disintegrated fibers from the carding drum and for spinning them. The feeding mechanism comprises a pair of nip rollers in surface contact, each nip roller having an elastic surface layer, a smooth-surfaced large diameter feed roller close to the nip rollers and spaced as closely as possible from the cylinder defined by the toothed surface of the carding drum, the smooth roller surface and the cylinder defining a triangular space therebetween, and a small diameter feed roller in the triangular space and in contact with the smooth surface, the smaller diameter roller having an elastic surface layer and preceding the larger diameter roller in the direction of rotation of the carding drum.

Abstract: A unit for disintegrating a sliver into spinnable fibers fed to a spinning machine comprises a fiber-disintegrating drum with serrations generating a cylinder on rotation of the drum. A first smooth feed roller guides the sliver to the cylinder and defines therewith a first and second wedge-shaped space on the sides of which the serrations approach and depart from the first feed roller during a rotation, and this feed roller may be adjustably spaced from the cylinder. A second clamping and smoothing feed roller is disposed in the first wedge-shaped space and defines a nip with the first feed roller, the feed rollers being operable to feed the sliver through the nip to the serrations. A cover extends into the second wedge-shaped space and is closely spaced from the first feed roller and as closely as possible from the cylinder.

Abstract: A perforated table is pivoted on a vertical axis to a machine frame on one side thereof. An upper set of juxtaposed, closely spaced needling units is arranged over the table in a transverse row. A perforated stripper is disposed between the upper set of needling units and the table. A lower set of juxtaposed, closely spaced needling units is secured to the table and arranged on the underside thereof in a transverse row. Each row of needling units has the same length, which defines the working width of the machine.Drive means for operating the needling units of the upper and lower sets in unison are provided and comprise flexible couplings between adjacent needling units in each set. Each needling unit is provided on the underside with needles and operable by the drive means to move the needles up and down.