Abstract: A spindle of an airjet spinning machine for guiding back the free yarn end after an interruption in a spinning process is disclosed. The spindle contains an injector duct in the immediate vicinity of the spindle orifice. To guide the free yarn end back after an interruption, compressed air is admitted through the injector duct and generates a suction action at the spindle end. After the yarn end has been guided back level with the entrance of the injector duct the yarn end is blown out of the spindle orifice by the compressed air.

Abstract: The invention relates to a slubbing machine, the use of a twist application means, and a method for the manufacture of a roving yarn (9). The roving yarn (9) is manufactured according to the invention from a fiber assembly (3), which undergoes a true twist application (rotation) by mean of one or more air flows.

Abstract: A drawing frame-slubbing machine combination for manufacturing a roving yarn from a fiber assembly is disclosed. The drawing frame-slubbing machine combination includes a drawing frame for doubling and stretching a fiber assembly into a drafter sliver and a slubbing machine with a twist application component configured to apply a true twist to the drafter sliver by one or more air flows.

Abstract: A spinning position for spinning yard from a fiber structure including a fiber guidance element is disclosed. The fiber guidance element includes a fiber guiding surface having a deflection point located in the interior of the fiber guidance element. The input direction of a fiber structure into the fiber guidance element forms an angle of inclination ? with the fiber guiding surface at the deflection point. The splaying of the outer fibers of the fiber structure is increased and the quality of the yarn is thereby increased. The jamming of the fiber elements lying parallel to the direction of introduction may also be avoided.

Abstract: A spindle (10) for an airjet spinning machine is proposed, which, for guiding back (B) the yarn end after an interruption in a spinning process, contains: an injector duct (1) which issues in the immediate vicinity of the spindle orifice (8). For guiding back, compressed air is admitted through the injector duct (1) and generates a suction action at the spindle end (11). After the yarn end has been guided back (B) level with the entrance of the injector duct (1) into the yarn guide duct (5), the yarn end is blown out of the spindle orifice (8) by the compressed air.

Abstract: During a jet spinning method, the rotating fibre ends or the subsequent wound fibres of the spun yarn (70) cause a spinning tension Fs. In tests, a direct correlation has been established between the spinning result and the spinning tension Fs. The aim of the invention therefore is to provide a method for spinning yarn in a jet spinner that permits an ideal spinning tension Fs despite high spinning speeds, thus achieving an optimal spinning result, in particular with regard to the yarn quality. According to the invention, a jet spinner is operated with a spinning tension Fs<20 cN by means of a configuration of spinning box elements.

Abstract: The invention relates to a spinning position (6), on a jet spinner, comprising a fibre guidance element (3). According to the invention, the splaying of the outer fibres of the fibre composite (1) for introduction, may be increased, and hence the quality of the yarn increased and also jamming of the fibre elements lying parallel to the guide element (34) may be avoided, whereby the introduction direction (34) of the fibre composite (1) is inclined to the direction of the fibre guide surface (5) at an entry edge (32) by an angle alpha and the entry edge (32) is arranged within the fibre guide element (3).

Abstract: The invention relates to a slubbing machine, the use of a twist application means, and a method for the manufacture of a roving yarn (9). The roving yarn (9) is manufactured according to the invention from a fibre assembly (3), which undergoes a true twist application (rotation) by means of one or more air flows.

Abstract: The invention relates to a Drawing-Frame-slubbing machine combination (35), with which, in the same machine, several fibre assemblies (38) are first doubled and stretched and a roving yarn (9) is then manufactured from this. The manufacture of the roving yarn (9) takes place in that a twist (rotation) is applied to the drafter sliver (3), whereby the twist application is effected by means of one or more air flows. To achieve this, the device (35) according to the invention exhibits a drawing frame (36) and one or more twist application means (4) arranged downstream of this.

Abstract: The invention relates to textile machines with several spinning places, whereby each spinning place comprises a can feeding means, a spinning unit, and winding unit. The invention is based on the task to design the spinning places in such a manner, to minimize the downtimes due to failures of machine components, or during re-fitting. According to the invention, such a spinning place is furnished with modularly structured and exchangeable spinning units and or winding units.

Abstract: A device for the manufacture of a spun thread from a fiber sliver includes a fiber conveying channel with a fiber guidance surface. A yarn guidance channel includes an inlet mouth aperture disposed such that the fiber guidance surface guides fibers to the inlet mouth aperture. A fluid generating device creates eddy currents around the inlet mouth aperture to incorporate individual fibers into an end of a yarn being formed in the yarn guidance channel. The fiber guidance surface includes a fiber delivery edge having a shape and disposed relative to the inlet mouth aperture such that the fibers are guided over the delivery edge and conveyed to the inlet mouth aperture in an aligned generally flat planar formation.

Abstract: To manufacture a spun yarn from a loose fiber structure, devices are used in which a swirl chamber is provided between a fiber delivery channel and a yarn extraction channel. A fluid is blown into the swirl chamber. This device exhibits in the swirl chamber a guide surface, which delimits the swirl chamber downstream for the purpose of guiding fibers or fiber sectors that are swirling in the swirl chamber, the surface extending in collar fashion around the inlet aperture of the yarn extraction channel. The guide surface may form an angle of at least 30° with the axis of the yarn extraction channel in the yarn extraction direction, and outer areas of this guide surface are at a distance interval from the inlet aperture of the yarn extraction channel that corresponds to at least one tenth of the effective staple length of the fibers that are to be processed.

Abstract: The application relates to a device for air spinning, i.e., for the manufacture of a spun yarn from a sliver. The device contains in particular a fiber guide element, a fiber conveying channel, and an eddy chamber housing attached to the fiber guide element. The eddy chamber housing contains in its turn a spindle with a yarn guide channel arranged at a distance interval from the fiber guide element. In addition, the eddy chamber housing contains a fluid device with at least one jet nozzle for the production of an eddy current about an inlet aperture mouth of the yarn guide channel. The fiber conveying channel exhibits a tunnel cladding, which is dimensioned in such a way that at the end of the fiber conveying channel a step to the eddy chamber housing is formed.

Abstract: The invention in the sector of textile technology relates to a housing (1) with a roller pair (2) mounted in it, whereby the housing and the roller pair (2) are for preference constituent part of an apron drafting device (3). The roller pair (2) consist of a bottom roller (4) and a top roller (5), which together form a nip or grip line (6). Both rollers are mounted in the housing (1), whereby one roller (5) is mounted rigid or essentially only movable in the housing (1) in the plane (7) formed by the two axles of the rollers (4, 5). The other roller (4), by contrast, is mounted so as to be movable in the housing (1) in such a way that the nip or grip line (6) can thereby be moved. According to the invention, the roller (4) mounted in the housing (1) so as to be movable exhibits an apron (8).

Abstract: The invention concerns a start of spinning or the method of piecing for spinning positions of air spinning frames, which, during a spinning process, produce a thread from a longitudinal fiber structure and which, for this, comprise a fineness influencing unit with parts drivable at the inlet side and part drivable at the outlet side with clamping points, a means for the air twist generation and a means for the thread take-off, whereby, after an interruption of the spinning process, the resumption of the production of the thread comprises the following steps. In particular, the method does provide for,that the start-up of the part of the drafting unit, driven at the outlet side, takes place with a subsequent time coordinated and delayed start-up of the part driven at the inlet side, in such a manner that the end portions of the torn longitudinal fiber structure and of the thread end overlap and pass, in overlapping condition, the clamping point of the part driven at the outlet side.

Abstract: The invention relates to a device for the production of a spun thread from a staple fiber strand by means of air spin method. The fiber guiding element according to the invention includes a fiber conveying channel with a fiber guiding surface, whereby the fiber guiding surface ends at a fiber presenting edge and leads the fibers of the staple strand in the form of an essentially flat arrangement lying next to each other. The fiber-guiding surface is configured in such a manner that it includes a diverting point which causes a deviation of the staple fiber strand, where the deviation is being provided in such a manner that the free fiber ends of the fibers within the staple fiber protrude from the staple fiber strand.

Abstract: To manufacture a spun yarn (4) from a loose fibre structure (2), devices are used in which a swirl chamber (3) is provided between a fibre delivery channel (1) and a yarn extraction channel (5). A fluid is blown into the swirl chamber (3). This device exhibits in the swirl chamber (3) a guide surface (20), which delimits the swirl chamber (3) downstream, for the purpose of guiding fibres or fibre sectors (6) which are swirling in the swirl chamber (3), said surface extending in collar fashion around the inlet aperture (11) of the yarn extraction channel (5). The guide surface (20) forms an angle (&agr;) of at least 30° (for preference 45-90° ) with the axis of the yarn extraction channel (5) in the yarn extraction direction, and outer areas of this guide surface (20) are at a distance interval from the inlet aperture of the yarn extraction channel (7) which corresponds to at least one tenth (for preference at least one sixth) of the effective staple length of the fibres which are to be processed.

Abstract: The invention relates to textile machines with several spinning places, whereby each spinning place comprises a can feeding means (2), a spinning unit (3) and winding up unit (4). The invention is based on the task to design the spinning places in such a manner, to minimize downtimes due to failures of machine components or during re-fitting. According to the invention such a spinning place is furnished with modular structured and exchangeable spinning units (3) and/or winding up units (4).

Abstract: An apparatus for producing yarn spun from a loose fibre array using a vortex flow includes a fibre supply duct having an outlet opening. A vortex chamber in communication with the outlet opening is also provided. A yarn take-off duct is present with an inlet opening in communication with the vortex chamber. The vortex chamber is also in communication with an exhaust duct. A wall that defines at least a portion of the vortex chamber is present and has an opening disposed therethrough allowing for communication between the exhaust duct and the vortex chamber.

Abstract: The invention concerns a start of spinning or the method of piecing for spinning positions of air spinning frames, which, during a spinning process, produce a thread (11) from a longitudinal fibre structure (10′) and which, for this, comprise a finess influencing unit (28) with parts (30, 29) drivable at the inlet side and part (32) drivable at the outlet side with clamping points (11), a means for the air twist generation (3) and a means for the thread take-off, whereby, after an interruption of the spinning process, the resumption of the production of the thread comprises the following steps.