Abstract: In a device for identifying undesirable particles in textile fibre material, especially on spinning preparation machines, in which the detection of the undesirable particles is effected by optoelectronic means, the fibre material can be detected by a recognition device and the measurement results can be supplied to an image-processing device. In order substantially to improve evaluation of the measurement of the undesirable particles, there is a combing-out element for at least one fibre sliver, with which a fibre tuft having open ends in the working direction and a fibre tuft having open ends opposite to the working direction can be produced. The measured values of undesirable particles at both fibre tufts can be supplied to a comparison device and the comparison values can be used for optimising setting parameters and/or structural elements of the spinning preparation machines.

Abstract: In an apparatus at a spinning preparatory plant for detecting foreign objects, for example, pieces of cloth, tapes, string, pieces of sheeting and the like, in fibre material, the fibre material is transportable in an air flow through a fibre transport duct or a feed chute and an optical sensor system is associated with the duct or chute, the wall surfaces of which have at least one transparent region through which the sensor system detects the fibre-air flow. To permit the at least one transparent region to be kept clean in a simple manner during operation, and to permit an unobstructed detection of the foreign objects, the transparent region projects into the fibre-air flow and the fibre-air flow is able to flow along the transparent region in force-applying contact therewith.

Abstract: An apparatus for detecting a foreign substance in a pneumatically advancing fiber tuft stream and for separating the foreign substance therefrom includes a conduit; an optical sensor arrangement situated at a first location of the conduit for detecting a foreign substance in flight and for emitting signals representing the foreign substance; a separating arrangement situated at a second location of the conduit downstream of the first location as viewed in the conveying direction; an evaluating device for processing the signals; and a control device connected to the optical sensor arrangement, the separating arrangement and the evaluating device for operating the separating arrangement.

Abstract: A process of and a feeding device for feeding material in fibre form to a machine for preparing the material for subsequent spinning includes a material feeding bin through which the material is continuously fed to a substantially horizontal feeding table situated approximate a rotary preparing roll. The horizontal feeding table and the approximate rotary preparing roll define an air gap therebetween. A feeder roll is located above the feeding table which conveys the material toward the air gap, and the feeding table is supported to move in a substantially radial direction relative to the rotary preparing roll under the influence of data detected by a detecting device which detects the impurity level of the material at a point upstream of the feeding table relative to the direction of fibre flow.

Abstract: The present invention relates to a charger for feeding a carding machine with a nap of textile fibers as regularly as possible, characterized in that the receptacle apron (5) is continuously driven at variable speed controlled by the cell (7 ) for control of the thickness of the fiber mat (4) on the spiked apron (6), in that the receptacle (2) is also provided at its outlet, above the receptacle apron (5), with a screed (8) for regulation of the flow of fibers and in that a regulator drum (9) of variable speed coacts with the spiked apron (6) for the regulation of the mat of fibers carried thereon.

Abstract: The combing machine is provided with a plurality of workstations each of which is provided with a table containing a funnel through which a combed web is formed into a sliver. Each table is pivotally mounted on a fixed shaft and a monitoring unit is provided to detect the rotation of the table about the shaft in response to a thick or thin place in the combed web passing through the funnel.

Abstract: A moisture spray device is positioned in overlying relation to the link slide and the cotton batt which moves down the slide with photoelectric sensing devices being provided on the lint slide for controlling a valve that supplies water to the spray device thus controlling the discharge of moisture onto the cotton batt in response to the thickness of the cotton batt. Time delay switches are incorporated to prevent the moisture control valve from shutting down in the event of a momentary break in the cotton batt and to allow the lint cotton in the slide to start normal flow after the tramper starts.

Abstract: A spinning machine is provided with a thread monitoring device having a light source and a light sensitive cell to sense the thread running to a spindle from the front exit rollers. The thread monitor is formed of two parts, each having a housing arranged on either side of the thread. Within each housing is the light source and the light sensitive cell. The housings are each detachably connected to a slider which is adjustably held in a guide support that can be swivelled and locked in a carrier which is secured to the free end of a support rail running alongside and parallel to the roller supporting arm.

Abstract: A bearing rail is provided extending along each side of the draw frame and spaced laterally from the outer edges of the double upper rollers. At the end of the each rail, in the area when the thread exits from the exit rollers, each rail is provided with two carriers, one of which is provided with a light source and the other which with a light receiving photo-cell. The light source on one side of the drawing frame is arranged in association with the thread being drawn adjacent the photo-cell on the other side so that the light source causes this remote thread to cast a shadow on the photo-cell adjacent to it. Similarly the light source on the other side, the thread remote from it and the photo-cell opposite it are also aligned. The shadow on each photo-cell produces an alternating current which is then independently fed to a circuit and switch means, housed at the inlet end of the bearing rail.

Abstract: A system for monitoring and securing a zone associated with a power driven textile machine, which machine includes a part which moves when the machine is in operation in a manner to endanger an individual present in the zone, which system includes a radiation emitting device for producing a beam of directed radiation and for directing such beam along a path coincident with at least one boundary of the zone, a radiation responsive device positioned in the path of the radiation beam for producing an output indication when it is not receiving the directed radiation and a control unit connected to the radiation responsive device for halting movement of the part in response to appearance of the output indication.

Abstract: An order produced by an interruption of yarn delivery at the exit of a spinning unit is cancelled so that the yarn-piecing automaton does not stop in front of the unit but continues to travel towards another spinning unit. At the same time, an alarm system is automatically triggered in order to warn operating personnel that a servicing operation is urgently required.