Abstract: A drafting system unit for a drafting system of a spinning machine having a first top roller and a second top roller spaced apart therefrom, characterized in that an apron cage to which negative pressure can be applied is arranged between the first top roller and the second top roller for guiding an air-permeable apron in circulation jointly around the apron cage and an apron top roller, the apron top roller being formed by the first top roller or by a third top roller that is assigned to the apron cage and arranged on the same side as the first and second top roller in relation to the fiber band being transported. The apron cage has at least one through-opening, to which negative pressure can be applied, for applying suction air to the fiber band running between the first and second top roller, through the air-permeable apron.

Abstract: The purpose of the invention is to reduce the abrasive impact of the fiber or the yarn on the rollers coated with elastic material, which are used for drafting and guiding purposes in yarn production techniques, and thus keep the operating conditions and yarn quality parameters constant. The fiber on the top rollers coated with elastic material especially in the mechanical ring compact yarn production among the yarn production techniques, is an apron cladding method, over the top roller and the bearing guide arms connected to a bearing body found on the bearing unit placed on the pressure arm, in a way that it would cover these together. The method includes the operation steps of stretching the aprons by application of tension via a tension component and, while the fiber drafting operation continues, the bearing unit carrying the aprons being shifted in the horizontal plane in certain intervals.

Abstract: A press monitoring system includes an electronic processor for accessing a communication network connected to the processor. A sensor is used for measuring a desired quality of the press connected to the electronic processor. The processor sends the communication network corresponding to the measured quality. A remote unit connected to the communication network is adapted to accept the signal from the electronic processor, and to display the measured quality of the press, whereby the press may be monitored remotely during a production run.

Abstract: A rail for supporting and guiding the lower belt of a drafting frame of a textile machine is provided with a coating of one or more of aluminum oxide, titanium dioxide, chromium oxide or molybdenum oxide in an oxide ceramic powder with a hardness of 800 to 1500 HV and a grain size of 45 to 5 .mu.m. A pressing arm urges the stand against its belt.

Abstract: A drafting apparatus for drafting a sliver in the yarn spinning machine preferably comprises upper and lower inlet rollers (2, 3), upper and lower apron belts (9, 6), upper and lower apron belt guides (10, 7) and upper and lower outlet rollers (4, 5). The upper apron belt (9) passes around the upper inlet roller (3) and the upper apron belt guide (10) and the lower apron belt (6) passes around the lower inlet roller and the lower apron belt guide (7) and cooperates with the upper apron belt (9) to define a nipping area (22) between the belts for nipping the fiber sliver (20) as it passes between the upper and lower inlet rollers while being sandwiched between the upper and lower apron belts (9, 6). The sliver is nipped in the nipping area (22) and is subsequently directed by the belts to a nip (25) formed between the upper and lower outlet rollers.

Abstract: An apparatus for drafting a continuous strand of staple fibers into a finer strand of the staple fibers and including a mechanism for supplying separated fibers suspended in a fluid and a rotating fiber chute receiving the fluid with the separated fibers axially and dispensing the fluid and the fibers radially. A collection belt with a porous portion is used for passing the fluid but holding back the fibers wherein the belt moves in a circular path around the chute and leaves the circular path to move the collected fibers thereon out of the circular path. A vacuum housing is positioned in close proximity to the collection belt and with an opening facing the collection belt for collection of the fluid.

Abstract: A drafting apparatus for roving or sliver, designed for high speed pneumatic spinning machines. The drafting apparatus comprises inlet and outlet drawing pairs of rollers as well as pair of endless aprons. The upper drawing roller of the outgoing drawing pair of rollers is offset angularly about the axis of the lower drawing roller, towards the closest pair of endless aprons. The angle of offset of the upper drawing roller is from 15.degree. up to 65.degree.. The advantage of the drawing apparatus according to the invention is that impairment of the roving by the air flow around the outgoing pair of drawing rollers is avoided because of the offset of the upper drawing roller about the axis of the lower drawing roller towards the drawing aprons.

Abstract: A roving of short fibers is converted to a continuous twisted thread by a device which grips the roving between the facing teeth of two endless belts, and an acoustically generated transverse air jet is directed at the side of the roving, at a fixed point situated between the two belts. The direction of the air jet is reversed each time the fixed point is passed either a pair of facing teeth, or the midpoint in the gap between two successive pairs of facing teeth.

Abstract: An apron for a draft apparatus being suitable for use with a pneumatic high speed spinning frame. The apron includes a front side rubber layer, a reverse side rubber layer adhered to the front side rubber layer and core cords interposed between the two rubber layers. The peripheral borders of the apron have such a construction that one of said rubber layers is retracted from the other of the rubber layers.

Abstract: Device for aligning and attenuating soft or brittle fiber mats employing a rotating vacuum roller for gently grasping the fiber mats under sufficient compressive force to hold the same without breaking or otherwise damaging the fiber mats.

Abstract: The control system is constituted by a succession of elongate parallel control elements, made of elastomer, which extend in directions transverse to the direction of the path of the fibres to be controlled and which each have a work face and an opposite face provided with at least one longitudinal fixing rib engaged in a longitudinal slit of a tubular support part and terminated by a retention head in the said tubular support part, the drawing device including means for guiding, driving and orientating all the aforesaid tubular support parts, to ensure the displacement of the said control elements for the fibres while abutting against the other control system of the drawing device.