Abstract: A closing member 1 for compressed air carrying polygonal tubes, which is inserted in a sealing manner into the polygonal tube at one end thereof. The closing member 1 includes an elastic sealing element 3, and the closing member is constructed such that it biases in its inserted state the sealing element 3 in such a manner that it seals and secures the closing member 1 relative to the polygonal tube 8. Closing members of this type are used to seal mounting tubes in yarn spinning machines with pneumatically loaded top roller support and weighting arms.

Abstract: A pneumatically energized loading mechanism for a drafting device is proposed for loading the upper rolls of the device. This mechanism possesses pneumatic cylinders which subject the upper rolls to a force, which acts from a holder plate (4) for the securement of the cylinder (2). The support is effected by a stop plate (200), which acts in unison with holder plate (4). The cylinder (2) possesses a guide surface (201) positioning the cylinder on the support (4). The cylinder (2) exhibits a piston with a circular cross-section and is comprised of plastic. The cylinder (2) is affixed to the holder (4) by a securement means (20). By the support of the cylinder (2) on the holder (4), the securement means (20) need accept no force engendered by the piston. The cylinder (2) simultaneously forms a passage for a current bus which serves as the power cutoff of the drafting device when fiber windup difficulties arise.

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

Abstract: A magnetic roll for use in roller pairs of a drafting system on a textile machine. Each magnetic roll includes a central pole member having a rare earth magnet positioned on either side thereof. An end pole member is provided adjacent each magnet, and a cot is provided next to each end pole member for gripping and propelling fibers between the roller pairs of the drafting system.

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: A novel weighting device for draft rollers, in which a diaphragm is provided, as a pressing unit, above each top side roller. The diaphragms provided on a spinning frame are classified into a plurality of groups corresponding to species of rollers such as front rollers, middle rollers, and back rollers. Each group of diaphragms has common piping having a regulator for air pressure and branched to the diaphragms belonging to the group. One end of the piping is connected to a common high pressure air source, from which air of a uniform pressure controlled by the regulator is supplied to the diaphragms belonging to the group. Since a weighting force onto a top side roller is a function of a air pressure supplied to the diaphragm, it can be changed or diminished at once in a centralized manner by adjusting the regulator. Therefore, troublesome adjustment of individual pressing units is unnecessary.

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: A machine for blending, matting, shortening or sizing natural or artificial fibers, in which the work is performed by groups or trains of three rollers. A first working stage has a single head delivering two slivers and in which the twin bearing rollers are of large size, the two slivers emerging from the single head being fed axially or perpendicularly by directional and juxtaposing members towards a second working stage in a single lap, the width of which is at least 50% less than the width of an individual sliver. The second working stage has a reducing head which comprises a plurality of trains with twin lower retaining and traction rollers, respectively, mounted overhung on frames, adjustably spaced from one another.