W. Schlafhorst & Co.

Zinser Textilmaschinen Gmbh

Joachim Rohner

Heinz Zumfeld

Reinhard Mauries

Hans-Jurgen Preuhs

Heinz Kamp

Josef Bertrams

Gregor Kathke

Rolf Becker

Herbert Knors

Klaus Rosen

Klaus Rautenberg

Erich Quack

Gunter Wilms

Jakob Leven

Wolfgang Kiesewetter

Franz Grabatsch

Edmund Wey

Helmut Nickolay

Wilhelm Maassen

Franz-Josef Reiners

Ivica Romic

Manfred Chardon

The process for replacing an empty roving bobbin with a full roving bobbin in a spinning machine, particularly in a ring spinning machine, in a dispensing position by an automatic roving bobbin changing device comprises taking the full roving bobbin from a storage location and putting the full roving bobbin in place of the empty roving bobbin. The full roving bobbin associated with the dispensing position is taken from one of a plurality of stand-by positions in the storage location. To provide a more automatic operation the process further comprises testing whether the full roving bobbin is present in one of the stand-by positions adjacent the dispensing position before beginning the exchange and when the absence of the full roving bobbin is indicated inducing a relative motion between the roving bobbin changing device and the stand-by positions until the roving bobbin changing device stands adjacent to one of the stand-by positions having a full roving bobbin. An apparatus for performing the process of our invention is also provided.

Process and apparatus for replacement of an empty with a full roving

A service device in a ring spinning machine is moved after a yarn break to the appropriate spinning position to separate the broken yarn end from the winding by generating an air blast that acts on the yarn end. If the winding build-up is in a stage in which the initial winding cone has not yet been completed, the air blast is set at a high value so that a relatively strong separating force acts on the broken yarn end. If, on the other hand, the build-up of the winding cone has been completed, the separating force acting on the yarn end is less. The stage of the winding build-up is determined with the aid of a switch, which is connected to a stop member that contacts and rests on the ring rail of the spinning position. The setting of the two air blasts is performed by a switchable trottle. Taking into consideration the stage of the winding build-up when setting the air blast that acts on the yarn end assures that the broken yarn end is separated in every instance from the winding, yet prevents loops from being separated at the same time.

Service device and method for applying an air blast to a broken yarn end

The spinning machine comprises a drafting frame for drawing sliver and at least one fiber suction station connected to a vacuum source associated with this drafting frame. To save energy each fiber suction station is provided with a sensing means for detection of broken fiber or roving and throttling means for throttling the suction. The throttling means is adjustable to a throttled position in the air stream which considerably reduces the air flowing into the fiber suction duct. This throttling means is also automatically disengagable into a position resulting in a considerably increased air flow rate following detection of broken fiber or roving by the sensing means.

Spinning machine

A method of producing a tension-proof thread connection by splicing includes preparing threads for splicing by contacting ends of the thread with a hot gas before splicing for dissolving the thread ends into open-ended individual fibers, for softening the individual fibers and for making the fibers better suited for splicing; and subsequently splicing the threads by alternatingly tangling, interlocking, swirling and intertwining the fibers of the thread ends, and a device for carrying out the method.

Method and device for producing a thread connection by splicing

A textile thread winding operation, includes a method of forming a thread reserve from the thread end of a textile coil wound on a hollow coil core which comprises removing a textile coil from a winding device and slowly rotating the textile coil in direction opposite to the direction in which a thread is wound thereon, pneumatically seizing a thread end of the textile coil with a suction gripper and sucking the thread end into the suction gripper, displacing the suction gripper so that the suction opening thereof is located at the end of the coil core extending out of the textile coil, and releasing the thread end at the coil core.

Method and apparatus for forming a thread reserve from the thread end of

A compressed air thread splicing device for producing a knot-free thread connection by splicing includes a splicing head having a splicing channel formed therein with two at least partially open ends for receiving threads to be joined in a given insertion direction and for alternately tangling, intertwining, swirling and winding fibers of the threads around each other, the splicing head having at least one compressed air inlet orifice formed therein leading into the splicing channel, the splicing head having at least one flow-channel formed therein branching off from the splicing channel transverse to the given insertion direction between the at least one inlet orifice and one of the ends of the splicing channel, and a switchable device connected to the at least one flow channel for generating a temporally limited current in the at least one flow channel in a flow direction away from the splicing channel.

Compressed air thread splicing device

A make-ready device for making a thread end ready preparatory to tying it to another thread end in a thread tying device, the make-ready device including s hollow body open at opposite ends thereof and traversible by a gas flow for receiving the thread end therein so as to at least partly stretch and parallelize the fibers of the thread end and cleanse them of short fibers, as well as for retaining the thread end therein, the gas flow being generated by an injected pressurized gas current, and pneumatically operative means conducting the injector gas for guiding the thread end in a central region of the inner hollow space of the hollow body.

Make-ready device for readying a thread end

A compressed-air thread splicing device for producing a knotless thread connection by splicing, the device having a splicing channel for receiving therein threads to be spliced to one another, the splicing channel being formed with at least one compressed-air injection opening and affording at least one of a plurality of operations to be performed on the fibers of the threads consisting of tangling, hooking, whirling and entwining the thread fibers mutually includes a first device for forming a thread guide contour edge at one end of the splicing channel, and a second device for forming a thread guide contour edge at the other end of the splicing channel, the thread guide contour edges partly covering a respective outlet and inlet of the splicing channel, and a controllable device for holding at least end fibers of ends of the threads in friction contact with at least one of the thread guiding contour edges during the splicing operation.

Compressed-air thread splicing device

Splicing head operated by a compressed gas for use in an automatic splicing device for producing by splicing a thread connection without knots, having a splicing head with at least two openings to admit the compressed gas, which accepts the two threads which are to be joined together, and has the capability to effect the mutual tangling, interwining, mixing and/or winding around of the fibers of the thread and which is provided at both ends of the splicing channel with thread- and air guides which cover the ends of the splicing channel asymmetrically so that only a part of the termination of the splicing channel remains free and which includes thread- and air guides connected with a removable cover which covers the splicing channel.

Splicing head operated by compressed air

A make-ready unit for making a thread end ready preparatory to connecting it with another thread end in a thread splicing device, the make-ready unit having a thread splicing device, the make-ready unit having a thread channel formed in a hollow body and traversible by a gas flow produced by injected gas, the thread channel being open at both ends for receiving the thread end transitorily therein, including a pressure-gas guiding device formed as a first ring channel surrounding the hollow body and having at least one pressure-gas supply location, the thread channel being formed with a thread inlet end through which the thread end is received and having a funnel-shaped flaring portion at the thread inlet end extending from a main cylindrical part of the thread channel, and a likewise funnel-shaped cover formed with a central opening and covering the funnel-shaped flaring portion of the thread channel in such manner that a second ring channel defined by conical surfaces extends from the first ring channel to the main cylindrical part of the thread channel.

Make-ready unit for making a thread end ready

In a winding machine having a plurality of sequentially disposed winding sections and common end sections, each of the winding sections includes a plurality of winding stations, and a bobbin tube transporter selectively adjustable for clockwise and counterclockwise rotation for discharging empty bobbin tubes, the bobbin tube transporters of all of the winding sections being mutually sequentially aligned.

Winding machine

A method for locating and holding an end of a thread wound on a spool at a winding station, with a thread connector having a thread suction nozzle with a thread sensor connected thereto, for partially unwinding the thread, includes starting the thread connector with the winding station, simultaneously bringing the spool at the winding station to a standstill after rotation in a forward direction and bringing the thread suction nozzle of the thread connector from a starting position to a position close to the surface of the spool, subsequently supplying the thread suction nozzle with suction for a limited time as soon as the rotation of the spool has ceased for sucking-in the thread end, rotating the spool in a reverse direction during the suction step after the rotation of the spool has ceased, subsequently holding the sucked-in thread end with the suction nozzle, and subsequently moving the thread suction nozzle back to the starting position thereby inserting the thread into the thread connector if the sensor has sensed the presence of the thread in the thread suction nozzle, while bringing the spool to a standstill again, and supplying the thread suction nozzle with suction again before moving the thread suction nozzle to the starting position if the thread is not sensed by the sensor, and a device for carrying out the method.

Method and device for locating and holding a thread end

Method of tying an upper thread to a lower thread by means of a device having a splicing chamber formed with an elongated slot for laying-in and tying the threads, including mutually tying the threads by splicing with compressed air acting thereon from a side, moving a thread regulator from a thread take-up location to a thread delivery location for laying-in the threads into the elongated slot of the splicing chamber, automatically severing the ends of the upper and the lower threads, blowing compressed air into the splicing chamber, and sucking in and firmly holding each newly formed shorter thread end by means of an air current, which comprises producing the air current for sucking-in and firmly holding the thread ends as a suction air current by means of an injector to which compressed air is admitted, and guiding the suction air current simultaneously in an approximately helical path, and a device for carrying out the method.

Method and device for tying an upper thread to a lower thread

A device for collecting ejected wound, partially wound, or empty spools at the working stations of an automatic spool winding machine, includes a device guided along the working stations for horizontally transporting the spools; at least two laterally spaced apart mounting devices disposed in vicinity of the transporting device; at least one spool removal device mounted to one of the mounting devices, the spool removal device including a spool diverting device downstream of the transporting device for receiving the spools, a spool lifting device for lifting the spools from the diverting device, and a spool collecting container for receiving the spools from the lifting device; and a device for transmitting force from the transporting device for driving the spool lifting device.

Device for collecting spools

Method for the knot-free connection of two threads formed of textile fibers of limited length having at least one twisted fiber strand, including a splicing device for mutually tangling, intermixing and intertwining individual fibers of the two threads, which includes inserting the two threads coming from opposite sides into the splicing device, trimming the end of each thread to a predetermined distance from the splicing device, vibrating, loosening, combing and separating the thread ends into individual fibers, cleaning and spreading apart each thread end by blowing compressed air into the splicing device obliquely to the longitudinal direction of the individual fibers and by beating, pulling and tearing with mechanical and pneumatic stresses in direction toward the thread ends, withdrawing the prepared thread ends from opposite sides up to the splicing device, tangling, mixing and hooking the individual fibers of the two thread ends to each other to form a splice connecting the threads after setting the splicing device in operation, introducing a thread twist into the splice, and removing the connected threads from the splicing device, and a device for carrying out the method.

Growing community of inventors

Monchen-Gladbach, Germany

Joachim Rohner