Abstract: The drawing mechanism for drawing textile fibers includes an input nip between a first pressure roller (6) and a first drafting roller (1), a first intermediate nip between a second pressure roller (7) and a second drafting roller (2), and an output nip between a third pressure roller (8) and a third drafting roller (3). Two additional nips are formed between a fourth and a fifth pressure rollers (9, 10) and the second drafting roller. A second intermediate nip is formed between a sixth pressure roller (11) and the second drafting roller (2). If the treated fibers are short, the draft occurs between the input nip (6 - 1) and the first intermediate nip (9 - 2), and between the second intermediate nip (10 - 2) and the output nip (8 - 3). If the fibers are long, pressure on the fourth and fifth pressure rollers (9, 10) is reduced. The draft zones then extend to the intermediate nips (7 - 2, 11 - 2). In this manner an adaptation to different fiber lengths is possible without alteration of the roller distances. .

Abstract: The machine comprises a series of rotatable spindles (3), each of these being associated with respectively one cap-shaped thread guide member (7) rotatable about the spindle axis. A first drive belt (5) serves for turning the spindles (3). A second belt (12) is in contact with whorls (11) on the thread guide members (7). A device exerting contact pressure (13, 14, 15) urges the second belt (12) during operation against the whorls (11) with an adjustable force so that the belt (12) exerts, by means of friction, a small braking force on the whorls (11) running faster than the belt (12). The contact pressure device (13, 14, 15) can be switched over in order to press the second belt (12) against the whorls (11) with a substantially greater force. Upon shutoff of the spinning machine, the contact pressure device (13, 14, 15) is switched over so that the decelerating second belt (12) exerts a substantially greater friction force on whorls (11) and rapidly brakes the thread guide members (7) concomitantly.

Abstract: The spinning device comprises a vertically displaceable spindle bearing plate (2) carrying a rotatable spindle (1), and a cap-shaped thread guide member (6) rotatable about the spindle axis. The bobbin changer has a supporting element (11) and a bobbin holder element (10) which are movable transversely to the spindle axis. An extension (9) is releasably mounted on the top end of the spindle (1) and/or of a bobbin tube (8) placed on the spindle. Once the bobbin tube (8) has been fully wound with yarn, a short yarn section is wound onto this extension (9), and then the spinning device is shut off. The spindle bearing plate (2) is lowered, and the supporting element (11) is moved toward the spindle axis in order to seize the extension (9). The spindle bearing plate (2) is lowered further, and the bobbin holder element (10) is moved toward the spindle axis, seizes the fully wound bobbin tube (8), and transfers the latter to a conveying means (14, 15).

Abstract: The apparatus comprises a stretching unit (S) delivering two stretched fiber rovings (4, 5). One fiber roving (4) serves as the core for the wrapped yarn to be produced and runs to a twist-imparting device (6, 7). The fibers of the other fiber roving (5) are transferred to a moving fiber feeding and holding surface (9) constituted by a perforated peripheral surface of a hollow disk (10). This surface (9) comes into contact with the core (4) at a point (C) in front of the twist-imparting device (6, 7). At this contact point (C), the fibers fed on the surface (9) are seized by the rotating core (4) and wound up. At the contact point (C), a fiber catching device (12) is likewise arranged, having an air-permeable surface (11) behind which a vacuum is maintained.

Abstract: A twist generator for a running fiber aggregate possesses two friction discs rotating in opposite directions and having end faces turned towards one another for the twisting of the fiber aggregate running between the friction discs. One friction disc is made flexible and is pressed by pressure rollers towards the end face of the other friction disc and consequently against the fiber aggregate. To allow defined conditions to be obtained as regards pressing force, there are two pressure rollers, of which one is arranged shortly before and the other shortly after the thread contact point of the friction discs in the direction of movement of the flexible friction disc. The two pressure rollers are mounted next to one another, but preferably offset in the direction of movement of the fiber aggregate, on a carrier which is pivotably fastened to a spring-loaded lever. The distribution of the pressing force to the two pressure rollers can be changed by adjusting the carrier relative to this lever.

Abstract: A twist is imparted to fiber slubbing (1) exiting from drawing rollers (2) by means of twister (4). Oriented, parallelized fibers (F) are applied to rotating fiber slubbing (1) in front of or within twister (4), the fibers (F) wrapping themselves around core thread (1). Because of these fibers (F), the twist of fiber slubbing (1) no longer unravels completely after twister (4), so that a spun thread (12) of great strength is obtained. The feed of fiber (F) to fiber slubbing (1) occurs by means of rotating feed element (8). It has a circular perforated surface (9), behind which a negative pressure is maintained to keep fibers (F) on the surface. The oriented, parallelized fibers (F) exit from drawing rollers (10) and are conveyed to perforated surface (9). The rotating fiber slubbing (1) comes into contact with surface (9) and then draws fibers (F) from surface (9).

Abstract: A drawing frame has an electric driving motor (M) and a main shaft (H), which is drivingly connected to several driven rollers (W1-W4, W1'-W4') in the two draw heads (11) of the drawing frame. Between the motor (M) and the main shaft (H) are arranged a belt adjusting gear mechanism (V and HO) and a clutch (K). The transmission ratio of the adjusting gear (V and HO) is automatically gradually reduced from a maximum value to the operating value, so that the main shaft (H) is smoothly accelerated.Cut-off devices are provided for automatically stopping the frame when a disturbance of any kind occurs. The cut-off devices switch off the electric motor (M), release the clutch (K) and actuate a brake (B) which acts upon the main shaft (H), and also an adjusting member of an adjustable disc (V) of the belt-adjusting gear (V and HO). The brake (B) can be relatively small, as it does not have to decelerate the uncoupled motor (M).

Abstract: Slubbing, which is to be drawn, is pulled from cans (25), which are mounted behind a drawing frame. The frame comprises a double draw head section with devices for filling two cans (7 and 8), which are situated at respective filling stations. The filled cans (7 and 8) are then automatically replaced by empty cans (2): A slide (15 and 16) moves two empty cans (2) rectilinearly, counter to the working direction of the draw heads, into the filling stations and simultaneously moves the filled cans (7 and 8) rectilinearly in the same direction into two removal stations (13 and 14). Thus, the replacement of the cans (7 and 8) proceeds very rapidly and with a minimal gap between the filled cans (7 and 8) and the empty cans (2), which avoids the need for the frame to be stopped. A device (M and H) for controlling and driving the frame is accommodated in a rear part (6) of the frame housing which is situated on the side of the removal stations (13 and 14) facing the filling stations (7 and 8).

Abstract: The device is composed of a spindle (7) which is provided with a drive means (9 and 10), and of a member for providing a twist, in the form of a bell (1), which encloses the spindle and can be rotated about the extended spindle axis. The bell is mounted independently of the spindle and provided with a drive means (5 and 6), which is furnished with a built-in freewheel (4) to enable the bell to rotate more rapidly than its drive means.

Abstract: The object of the process is to produce a yarn comprising a core of continuous filament and a sheath of staple fibers. The staple fibers are delivered to a suction surface comprising a perforated collecting surface exposed to relative suction in a suction zone, the fibers being conveyed in a current of air moving virtually at right angles to the surfaces of two counter-rotating friction discs having narrowly spaced opposing faces defining a gap. From the suction zone, the staple fibers are transferred, generally at right angles to the axis of the current of air, into the gap. The continuous filament is united with the staple fibers in the suction zone, and both components are twisted in the gap between the counter-rotating friction discs.

Abstract: A cylindrical tube is inclined from the vertical below a sliver guide, the bottom end of the tube being mounted on a supporting element, and the upper part being accommodated in a bearing, the outer race of which is located in a horizontal plate. The horizontal plate has a gyratory motion imparted to it through two crankshafts, such that the tube would undergo a nutational movement. To improve the distribution of the sliver, the axis of the cycloidal loops of sliver passing from the tube is shifted by journaling the crankshafts on a second horizontal plate to which a gyratory movement is imparted by a second pair of crankshafts. The first pair of crankshafts is driven more slowly than the second pair.

Abstract: A process and apparatus for spinning textile fibres in which the separated fibres are conveyed in an air stream into a confined space between two contra rotating friction discs (6,7). The air stream enters through an opening (5) in one disc (6) and passes through a permeable collecting surface (9,13) into a static suction exit passage (15) located within the other disc (7). The fibres are drawn off at right angles through the annular gap between the two discs and in doing so are twisted into a roving (16).

Abstract: Pressure between rollers in each set thereof in a drawing frame is maintained by oil pressure in a main pipe circuit connected to piston and cylinder assemblies allocated to the sets of rollers. A motor driven pump feeds oil from a tank through a feed pipe to the main circuit except when a first solenoid-controlled valve directs the oil through a first return-flow pipe branched from the feed pipe. So long as a pressure gauge connected to the main circuit is indicating the pressure to be below a minimum, it excites the first solenoid-controlled valve to close the first return-flow pipe. When, as a result of lapping on a drafting roller the gauge indicates a maximum pressure, it causes the machine to stop. A second solenoid-controlled valve has its excitation periodically suppressed to open a passage through a second return-flow pipe to prevent the temperature of the drawing frame from overheating the main pipe circuit.

Abstract: Apparatus for receiving and gathering a fibre band from a card or stretcher is arranged for a hopper wheel to deliver the band into the top of a cylindrical tube inclined to a vertical line passing centrally through its lower end, the tube being arranged to wobble so that its longitudinal axis traces out the surface of a cone around this vertical line. This movement is effected by crank mechanism acting on the outer race of a ball bearing assembly embracing an upper portion of the tube. The lower end of the tube rests on an internal flange of a cylindrical ring that centers the lower end of the tube. The band is gathered in rings of overlapping loops contacting the inner surface of the tube. The gathered material passes through the ring and then through a tubular duct to a container at one side of the apparatus.