Abstract: An apparatus for pneumatically aspirating a yarn end from a spinning cop (15) with a suction nozzle (33) whose working position is adjustable has a housing (16) defining a vertical aspirating slit (19) over which a sealing belt (31) is disposed. An air passage (32) is formed in the belt (31) with the suction nozzle (33) fastened on the belt (31) about the passage (32). The belt (31) is selectively displaceable between a sealing position completely closing the aspirating slit (19) in the housing (16) and various aspirating positions wherein the air passage (32) of the belt (31) is in communication with the aspirating slit (19) of the housing (16) to apply suction through the nozzle (33) to initiate an effective, yet gentle loosening of a yarn end (46) from the conical windings (43) or the surface area of a spinning cop (41).

Abstract: An apparatus is disclosed for removing bobbin tubes axially from individual tube carriers conveyed along a conveying path. The bobbin removing apparatus basically comprises a pair of bobbin withdrawal devices located at opposite lateral sides of the conveying path for frictionally engaging the bobbin tubes therebetween to thereby draw the bobbin tubes off the respective carriers while they are continuously conveyed along the conveying path. According to the invention, one or both of the withdrawal devices comprises a freely rotatable disk having an annular periphery of a high coefficient of friction arranged for peripheral engagement with the bobbin tubes conveyed along the conveying path to be rotated by engagement with each bobbin conveyed past the disk. The disk or disks are arranged to engage the bobbin tubes at an acute angle with respect to the conveying path of the individual carriers on which the tubes are supported.

Abstract: An open-end spinning unit having a one-piece fiber guide conduit inserted between the opening roller housing and the rotor housing is drawn from a steel tube and embodied as an interchangeable component. The fiber guide conduit can be releasably mounted at one end in the opening roller housing in a seating recess and at the other end in the rotor housing in a bore of a sealing plate that is attached to the rotor housing. The sealing plate maintains a low pressure condition created by a vacuum line attached to the rotor housing. This low pressure condition induces the pneumatic conveyance of opened fibers from the opening roller to the rotor through the fiber guide conduit. Sealing components, such as an O-ring in the opening roller housing and a sealing nozzle at the rotor housing assure that a sealed connection of the fiber guide conduit both with the opening roller housing and with the sealing plate is maintained for pneumatic conveyance.

Abstract: A yarn being spun in a spinning station of a spinning machine is drawn off with an apparatus which includes a pair of rollers for clamping the spun yarn in a gap between the rollers and transporting the spun yarn. The rollers include a draw-off roller being driven continuously in a draw-off direction at a given circumferential speed and a switchable feed roller for contacting the draw-off roller and for being driven through friction by the draw-off roller when contacting the draw-off roller. A method for drawing off the spun yarn includes positioning the yarn to be drawn off between the rollers while the feed roller is not contacting the draw-off roller. The feed roller is driven with a fluid in a circumferential direction and accelerated to a circumferential speed being at most the given circumferential speed. The feed roller is then placed in contact with the draw-off roller.

Abstract: A servicing apparatus for automatic repair of yarn breaks in open-end spinning machines is provided with a device for replacing finished yarn packages with empty tubes, and a multi-functional yarn manipulating element having a work head equipped with a yarn brake and a contoured yarn guide element, the manipulating element being selectively movable between a position (c) at a top end of the tube for forming a top winding at the completion of winding a full yarn package, a position (a) at a base end of the tube for forming a yarn reserve winding upon beginning the winding of an empty tube, and a position (b) moving axially along the tube to prevent the creation of parallel windings during the repair of a yarn break.

Abstract: A sliver feeding device for an open-end spinning frame, comprising a sliver draw-in roller and a sliver feed trough pivotable about a supporting shaft for movement toward and away from the draw-in roller. The draw-in roller has an annular sliver conveying collar which defines a sliver nip between the collar and the feed trough, and the feed trough has opposed laterally spaced bars for receiving the collar therebetween to guide the sliver at the nip. The draw-in roller is rotatably supported so as to permit a predetermined amount of axial movement of the collar between the guide bars of the feed trough. Similarly, a predetermined amount of axial movement of the feed trough is permitted on the supporting shaft. The collar has axial end faces each comprising a respective cleaning device. The guide bars of the feed trough have inwardly facing bevels which, in connection with the axial play of the feed trough on the supporting shaft, assure automatic pivoting of the feed trough into its operating position.

Abstract: An open-end rotor spinning machine includes open-end spinning apparatuses each having a rotor housing, a spinning rotor revolving at high rpm in the rotor housing, and a yarn draw-off device extending into the spinning rotor. A cooling device includes a channel plate closing the rotor housing in an operating state. The channel plate has double walls defining a cooling chamber therebetween surrounding the yarn draw-off device. Connection sleeves connect the cooling chamber to a coolant loop.

Abstract: A conveyor system for transferring yarn packages or other yarn packages from one conveyor belt to another downstream located conveyor belt traveling in the same conveying direction and at the same speed. The conveyor belts are guided on support structures which are embodied as lateral guide elements which are height-adjustable in a selected area. The lateral guide elements are connected by a linkage such that, when the inward guide elements are lowered, the outward guide elements are simultaneously raised, thereby to cause yarn packages to gravitationally roll from the first belt to the other belt.

Abstract: A device for determining the velocity of a longitudinally traveling textile material, especially a yarn, using the closed-loop correlation of a transit time correlator in such a way that its reliability is improved. At least one sensor g.sub.1 consists of two signal receivers disposed one behind the other in the running direction of the yarn, having a sensor output characteristic curve with the intersection of the abscissa in the effective sensor center axis, and wherein the output characteristic curve shows a point-symmetrical behavior at least in the vicinity of the intersection with the abscissa. A second sensor g.sub.2 has a steady state output characteristic curve in the area of its effective sensor center axis. The control loop circuit of the transit time correlator is designed such that the undifferentiated cross-correlation function is used as the controller input signal for determining and readjusting the adjustment point for the model delay time .tau..

Abstract: A yarn splicing device for textile winding machines comprises a splicer mechanism for pneumatically joining yarn ends, upper and lower clamping and cutting devices, and suction-actuated yarn placement devices for placing the yarn ends to be spliced. According to the invention, one yarn placement device is a gripper tube normally parked in a zero position upstream of the yarn travel. The gripper tube has a spring-biased, pivotable gripping flap and a yarn placement hook for simultaneously placing both the lower yarn and the upper yarn to be spliced. For that purpose, one of the gripper tube and gripper tube flap carries the yarn placement hook forwardly for manipulating the upper yarn and a yarn guide disposed between the yarn placement hook and the pivot axis of the flap for placing the lower yarn.

Abstract: A pneumatic debris aspirating device adapted to be retrofitted on open-end spinning frames originally designed for a mechanical debris disposal installation utilizes an asymmetrical debris pickup funnel which can be connected via a connector conduit to a source of suction which is part of the spinning mill. The debris aspirating device is embodied and disposed such that opening of a cover to each rotor spinning unit is not hampered.

Abstract: A method and apparatus for transmitting data within a textile machine of the type having a central main power supply and many identical work or spinning stations is disclosed with the data being for controlling operational at independently operable work stations, particularly in open-end bobbin winding machines. A separate power supply is included for providing a buffer voltage for use at memories within the individual spinning station central units, with the power supply output being DC voltage at a predetermined level. The DC buffer voltage signal is modulated with the data for transmission to the work station, transmitted to the work station and demodulated thereat for use.

Abstract: An open-end spinning apparatus in a spinning machine for continuous spinning of textile fibers includes a spinning rotor having an axis. A cap covers the spinning rotor and is pivotably supported about a pivot axis oriented at right angles to the rotor axis. Delivery and opening devices are disposed in the cap for supplying textile fibers to the spinning rotor. A stationarily installed shaft extends longitudinally of the spinning machine for driving a multiplicity of opening devices. A worm transmission drives at least the opening device and has a driving worm on the stationarily installed shaft and a worm wheel with teeth on a drive shaft of the opening device. The worm wheel meshes with and plunges into the driving worm upon closure of the cap. The driving worm includes at least one thread having adjacent windings with end surfaces and with lateral surfaces having an additional shaping tapering the end surfaces to a point.

Abstract: In a textile machine wherein a creel is pivotably supported on a pivot shaft, pivoting movements of the creel and its shaft are controlled via an electrical motor generating torque and a belt transmission unit connecting the motor to the pivot shaft. The belt transmission unit includes at least one belt wound about the drive shaft of the motor and secured to the drive shaft and to two securing points of a transmission lever fixed to the pivot shaft.

Abstract: An open-end rotor spinning machine is equipped with a service structure for the automatic correction of yarn breaks occurring in the course of the bobbin winding and for the automatic exchange of empty tubes for finished packages, wherein empty tubes are delivered to and finished packages are removed from the work stations via an endless transport device. The service structure has a package ejector for ejecting finished packages from the work stations, a tube gripper for retrieving an empty tube from the transport device, and a tube positioning device connected with the package ejector of the service structure to position an empty tube held by the tube gripper precisely into desired disposition relative to a respective work station to be supplied with an empty tube.

Abstract: An open end spinning machine with an associated service device having a supplementary yarn conveying device utilizing a delivery tube disposed on a delivery tube holder which can be pivoted into various work positions. A yarn guide plate is movably seated in the area of the delivery tube holder and has a yarn guide notch as well as a yarn placement slit and can be selectively controlled by means of a thrust cylinder. By pivoting the yarn guide plate, the yarn extending through the yarn guide notch is transferred to specially designed yarn catch devices of a tube supporting disk seated in a creel of a work station of the spinning machine. Subsequently, the grasped yarn slides automatically into the yarn placement slit which is disposed below the notch and, while being securely guided in the yarn placement slit, is wound as a reserve winding on the empty tube rotating in the creel.

Abstract: A sliver can transport system includes a can vehicle for transporting sliver cans while traveling between a can delivery station, work stations of at least one sliver-processing textile machine having machine parts with fixed locations, a discharge station for empty cans, and path locations within the can transport system. The can vehicle has parking places for the cans, a loading and unloading device for the cans, and a positioning device for positioning the can vehicle relative to the parking places for the cans. At least two spaced-apart can stands each have at least two parking places for sliver cans and the parking places are each combined into self-contained structural units. The structural units have vertically adjustable floor supports for vertically positioning the can stands, and stops for engaging at least one of the fixed locations of the machine parts, a further one of the can stands and the path locations, for horizontal positioning in two degrees of freedom.

Abstract: A device for searching for the yarn end on the conical windings of textile yarn cops increases the dependability of the detection of the position of the conical windings by providing a nozzle element in the yarn grasping mechanism for contacting the conical windings and whose position can be changed in relation to a sensor-controlled lifting mechanism. A sensor is arranged on the yarn grasping mechanism to detect a position change of the nozzle element relative to the lifting mechanism caused by contact of the nozzle element with the conical windings. The sensor is electrically connected with the drive of the lifting mechanism. The nozzle element, which advantageously is of a tubular bell-shaped configuration having a conical interior configuration, can be displaced coaxially to the longitudinal axis of the cop in an end of the yarn grasping mechanism which can be moved by the lifting mechanism. A marking, which can be easily recognized by the sensor, is placed on the displaceable nozzle element.

Abstract: Sliver is delivered from a drawing frame to an open-end spinning frame in sliver containing cans and, at a transfer location along the travel path of a servicing device for the spinning frame, sliver is removed from the cans in partial lots and transferred to a sliver transport location on the service device to be transported to a spinning station whose sliver supply has been exhausted, whereat the servicing device performs the transfer of the sliver lot to the spinning station as well as the introduction end the piecing-up of the sliver.

Abstract: A magnetic bearing is disclosed for an open-end spinning rotor having a shaft supported in a wedge-like gap formed between at least one pair of support rollers. The bearing comprises a housing for receiving the shaft, a magnet disposed in the housing to extend radially relative to the shaft, and a magnet disposed on and radially extending from the shaft axially adjacent and at a spacing from the magnet in the bearing housing. The magnets have respective poles of the same magnetic orientation disposed to face and thereby repel one another. According to the invention, a coupling connects the shaft and the magnet disposed on the shaft, the coupling being releasable in response to an axial force exerted on the shaft.