Abstract: In the case of a drafting arrangement for a spinning machine, at least one drafting zone has a sliver guide with a guiding surface for the travelling sliver. The sliver guide is arranged in a wedge-shaped gap, which is formed by a roller pair downstream of the drafting zone. According to the present invention, the sliver guide comprises a sliver brake with a pressing element which slides on the sliver. The pressing element is resilient with a pressure in the direction towards the guiding surface, and is disposable against the travelling sliver. The evenness of the drafting is thereby improved.

Abstract: A device is disclosed for damping the vibrations of a package on spinning, twisting or winding machines. Damping elements act on the swivel-mounted package holders, which damping elements are arranged on the machine frame and which are effective on the swivel direction of the package holders. The package holders are supported with tube sections on a swivel axle which is secured to the machine, and support the packages, which are pressed onto a driving roller and are rotatably supported thereon. In the swivel direction in which the packages are lifted from the drive roller, the damping is greater than in the swivel direction in which the packages are pressed onto the drive roller. The cylindrical outer contour of each individual tube section is surrounded, at a predetermined angle of contact, by a close fitting brake belt which is actuated by friction. One end of the brake belt is secured in a non-movable way on a stationary mounting, while the other end is secured to a loading spring.

Abstract: In the case of an open-end rotor spinning arrangement, in which the spinning rotor is arranged in a housing which is connected to a vacuum source, a fiber feeding duct is provided which extends from an opening roller to the area of a sliding surface which widens conically to form the fiber collecting surface of the spinning rotor. The smallest cross-section of the fiber feeding duct is situated at a distance from the mouth which is constructed as a slot, the height of which in the axial direction of the spinning rotor is much smaller than the ideal diameter of the smallest cross-section. The ideal diameter is defined as that diameter which corresponds to a circular area corresponding to the smallest cross-section.

Abstract: In the case of a supporting disk for a supporting disk bearing for open-end spinning rotors, the front side is provided with signal generators for the purpose of non-contact revolution counting, which function by means of magnetic field lines. Preferred are permanent magnetic pins which fit into the supporting disk, and which create an induction current. Single magnet embodiments include removal of surrounding disk material to mechanically balance the disk.

Abstract: In order to form a yarn reserve winding on the edge of a rotating empty winder tube after a doffing action on a package-producing spinning aggregate, the rotational speed of a drive roller which drives the winder tube is kept constant. The delivery speed of a delivery device, which draws the yarn from the spinning aggregate and delivers it to the winder tube, can be regulated. The yarn tension between the delivery device and the winder tube is thus kept constant during the forming of the yarn reserve winding as well as during and after the transfer of the yarn to a traversing device.

Abstract: In the case of a mounting for an opening roller comprising a plurality of teeth, all the tooth faces and the tooth backs are inclined in rotational direction. At their tips, the tooth faces form an angle relative to an opening roller radial plane of between 10.degree. and 30.degree. . The tooth backs are more inclined to the radial plane at the tooth tips than at the tooth bases. The tooth backs are inclined at the tooth tips in such a way that an extension of the tangent to the tooth back at the tooth tip intersects the tooth face of the following tooth at an intersecting point which is between one-fifth and four-fifths of the tooth height of the following tooth. At least one-half of a tooth height from the tooth tip to the tooth base has a roller circumferential direction width which is at least as large as the distance between the back of the respective tooth and the face of a next adjacent following tooth.

Abstract: A yarn withdrawal navel for an open-end spinning apparatus is provided with a ferromagnetic locating surface. This is used for the purpose of coupling to a mounting, which has at least one permanent magnet. The yarn withdrawal navel and the mounting have abutment surfaces which are configured to vary the magnetic mounting effect on the navel as a function of the relative rotation position of the navel and the mounting.

Abstract: In the case of a supporting disk for a supporting disk bearing for open-end spinning rotors, the front side is provided with signal generators for the purpose of non-contact revolution counting, which function by magnetic field lines. Preferred are permanent magnetic pins which fit into the supporting disk, and which create an induction current.

Abstract: A two-apron drafting unit comprises at least one sliver guide which projects into the wedge-shaped gap of the roller pair which follows the apron unit. The sliver guide has a defined distance from the surfaces of the roller pair and can be moved within certain limits in the longitudinal direction of the roller pair. The sliver guide is arranged in a holding device which is aligned in parallel to the roller pair as well as with respect to the height of the drafting zone plane. The holding device, which has a slideway for the sliver guide, is arranged on a supporting part which is connected with the lower deflection guide for the bottom apron.

Abstract: In the case of a device for open-end rotor spinning, the axles of the spinning rotor, the supply roller and the opening roller--in plan view--are arranged in parallel planes to each other. In side view the axles of the supply roller and the opening roller are arranged inclined compared to the horizontal axle of the spinning rotor. A driving shaft extends perpendicularly to the above mentioned planes and drives the supply roller with a worm and a worm gear. The axle of the drive shaft is also the swivel axis for a hinged housing which supports the supply roller and the opening roller, the hinged housing also containing the cover for the spinning rotor. The hinged housing is supported independently from the rotor housing and is detachable at right angles to the swivel axis. Both the opening roller and the supply roller are accessible from the operational side when the hinged housing is in spinning position.

Abstract: In the case of a fitting for an opening roller of an open-end spinning device, it is provided that several rows of teeth extend essentially in circumferential direction of the opening roller. The teeth rows are separated from each other by grooves. The lateral flanks of the teeth extend over the groove base in to the lateral flanks of the neighboring row of teeth. The lateral flanks of the teeth, as well as the groove base are provided with a structured surface. The teeth tips connecting the lateral flanks are not provided with this structured surface.

Abstract: In the case of a tube coupling system for a spinning or twisting spindle, in the case of which cap-type buttons project away from the outer circumference and come to rest against the interior wall of the tube, it is provided to place in the hollow spaces formed by the cap-type buttons one body respectively with a given mass. Because of the centrifugal force exercised by the massive bodies, the buttons are pressed toward the outside during the rotation of the spindle and come to rest against the interior wall of the tube. During the stoppage of the spindle, no radial force is operative in the case of the tube coupling system so that an axial displacement of the tube, particularly the removal of a full package and the fitting of a new tube, are possible without the resistance of the tube coupling system.

Abstract: For the monitoring of the lap formation in the case of delivery bottom rollers of drafting units, sensing elements are provided which, when a lap is formed, as a result of the enlarged diameter at the delivery bottom roller, are moved radially away from this delivery bottom roller. The sensing elements are used as switching elements for an electric circuit to which a number of sensing elements, and preferably all sensing elements of the spinning machine, are assigned. When a lap is formed, the assigned electric contact is opened by the shifting movement of the sensing element so that the electric circuit is interrupted. The interruption of the electric circuit causes the triggering of a signal.

Abstract: A sliver guiding arrangement for drafting units of spinning machines is provided with forcibly traversing sliver guides. Two sliver guides respectively which are assigned to adjacent slivers and which are connected in front of a wedge-shaped gap of a clamping roller pair, are connected with one another by a coupling member to form one structural member. The coupling member is driven via a driving device by a traversing rod to carry out traversing movements. The driving device, which bridges a distance between the traversing rod and the coupling member, is movable relative to the coupling member in the direction of the wedge-shaped gap. The structural member, which includes the sliver guides, is guided in parallel to the wedge-shaped gap on a sliding surface.

Abstract: A spinning arrangement in which the working elements for the processing of fiber material are arranged within an adjustable climate-controlled zone. The climate-controlled zone can be adjusted in such a manner that the fiber material fed to the working elements has the tendency to supply humidity to the ambient air of the climate-controlled zone. Before the feeding, particularly when deposited in a can or on a roving bobbin and/or on the transport path to the working elements, the fiber material is surrounded by air whose climate differs from the climate in the adjustable climate-controlled zone of the working elements. During the processing, the fed fiber material and the working elements are each in a different climatic condition that is optimal for the processing.

Abstract: In the case of a spinning machine for the spinning of yarns from slivers with a can feeding, the slivers are transported from the cans to the spinning stations by a belt which is provided with holding elements which hold the sliver on its surface. The holding elements may comprise surfaces which guide the sliver laterally by a frictional engagement or may have devices so that the sliver adheres with its supporting surface to the belt. Advantageously, two slivers are transported by one belt.

Abstract: A spinning or twisting bearing assembly for supporting a spinning or twisting shaft is disclosed. The bearing assembly includes a spindle shaft neck bearing having roller bodies engageable with the spindle shaft at a first axial location above a step bearing assembly for supporting the bottom end of the spindle shaft. The neck bearing and step bearing assembly are disposed in a bearing housing. An outer housing is disposed to surround the bearing housing with an annular gap therebetween along a substantial length of the bearing housing. The outer housing is fixedly clamped to a spindle rail. In order to isolate sound causing vibrations from the roller bodies of the neck bearing, the bearing housing is clamped to the outer housing only at a position below the bearing housing.

Abstract: In a spinning machine having a plurality of spinning units arranged next to one another and having a movable servicing apparatus which can be applied to the individual spinning points for the piecing, it is provided that the servicing apparatus has a splicing device with a splicing duct directed toward the spool package. A yarn storage device is arranged approximately as an extension of the splicing duct and a guiding element of the servicing apparatus which transfers the newly spun yarn in the area of the yarn storage device can be brought between a device for the withdrawal of a yarn and devices for picking up this yarn which can be moved into the area between a spool package and the splicing device.

Abstract: In the case of a spinning or twisting spindle, a plate, which is clamped in between a flange of a spindle bearing housing and a spindle rail, is provided as the common holding element for a securing hook and a brake.

Abstract: In the case of a two-apron drafting unit for spinning machines, it is provided for the parallel alignment of the top apron cradle and of the pressure roller twin guided by it with respect to the pertaining bottom cylinder that the pressure roller holder arranged in the load carrier only takes over the function of providing the load and the lateral guiding. The parallel alignment of the apron cradle is caused by a preferably L-shaped stop against which the apron cradle will be placed. The shaft of the pressure roller twin is unguided in the radial direction in the pressure roller holder.