W. Schlafhorst & Co.

W. Schlafhorst Ag & Company

Heinz Zumfeld

Joachim Rohner

Reinhard Mauries

Josef Bertrams

Hans-Jurgen Preuhs

Klaus Rosen

Gregor Kathke

Rolf Becker

Herbert Knors

Gunter Wilms

Jakob Leven

Wolfgang Kiesewetter

Franz Grabatsch

Klaus Rautenberg

Erich Quack

Wolfgang Irmen

Ivica Romic

Rudolf Consoir

Manfred Chardon

Heinz Differding

In a method and apparatus for preparing yarn ends, two yarns to be joined together by pneumatic splicing are placed in a splicer head of a splicer at a given instant with ends of the yarn to be prepared protruding out of a splicing channel of the splicer head in mutually opposite directions. The yarn ends are held taut at given points. The yarn ends protruding from the splicing channel are shortened to a length required for a splicing process by cutting off portions of the yarn ends between the given points and the splicer head and producing cut edges. The yarn ends to be prepared are aspirated with the cut edges leading into respective preparation nozzles at a predetermined speed. Twists in the yarn ends beginning at the cut edges are pneumatically unravelled with compressed air during the aspiration into the preparation nozzles. Locations of the yarns in the splicing channel are maintained relative to one another and to the splicing channel from the given instant until the pneumatic unraveling is completed. The yarn ends are aspirated far enough to prepare a yarn length for splicing being optimally matched to applicable yarn parameters while a not-unraveled portion of the yarns remains stationary in the splicing channel. The duration and intensity of preparation of the yarn ends are adapted to the yarn parameters.

Method and apparatus for preparing yarn ends to be spliced

In a yarn splicing device having a splicing head defining a splicing chamber and a yarn insertion slot, a compressed air passageway network is formed for delivering compressed air into the splicing chamber, the passageway arrangement having opposed air discharge passageways which extend laterally with respect to the splicing chamber in spaced relation therealong in a common plane at the back side of the chamber opposite its entrance slot to open tangentially into the chamber in opposite directions for contacting the yarn ends with one another for splicing.

Yarn splicing device

A splicing head for a compressed air yarn splicing device has a splicing chamber with a yarn insertion slot opening thereinto and an arrangement by which a pair of compressed air entrance openings may be adjustabley located at differing dispositions with respect to the splicing chamber so that differing splicing air vortices may be selectively generated within the splicing chamber as required for differing yarn characteristics. A common compressed air supply with a single control valve is provided for supplying compressed splicing air to each entrance opening. In one embodiment, a plurality of entrance openings are formed in the splicing head and a shiftable slide plate having a pair of compatible openings enables selective communication between the compressed air supply and the splicing chamber through alternate pairs of the plural entrance openings. In another embodiment, a pair of the entrance openings are formed in a shiftable member mounted to the splicing head for adjustable disposition of the openings relative to the splicing chamber. The splicing head thereby eliminates the need for a plurality of interchangeable specialized splicing heads.

Splicing head with variable compressed air entrance openings

A device for producing a thread connection by splicing includes a splicing head having a splicing chamber formed therein in which a tension-proof thread connection is formed by mutually entangling, hooking, intermingling and/or wrapping fibers of thread ends, means for supplying heated splicing air to the splicing channel, and an adjustable heat source coupled to the splicing head.

Device for producing a thread connection by splicing

An automatic splicer for spun yarn, including open end spun yarn. Opposite yarn ends for splicing are inserted in opposed yarn clamping devices, adjacent yarn loop pulling devices, in a splicing slot of a splicing chamber, adjacent mechanical combing devices and in yarn severing devices. Excess yarn is cut from the yarn ends by the yarn severing devices at a predetermined distance from the splicing slot and the yarn loop pulling devices are advanced to pull the ends of the yarns to the combing devices at which air is applied to the yarn ends to direct the yarn ends to the combing devices. The yarn loop pulling devices are then partially retracted to feed the yarn ends into the combing devices at a controlled rate of feed for combing the yarn ends progressively from their ends to a length corresponding approximately to the length of the subsequent splice. The yarn loop pulling devices are then advanced further to withdraw the yarn ends from the clamping devices and into alignment in the splicing slot in which compressed air is applied to splice the yarn ends. The combing devices are rollers with needle clothing and they may be driven by the force of the air that is applied to the yarn ends to direct the yarn ends to the combing devices. Yarn feed slots may be formed in the splicing chamber extending transversely from the splicing slot to combing devices, in which case the severing and application of air for directing the yarn ends may be performed sequentially for the two yarns to avoid both yarn ends being drawn into the same feed slot.

Automotive splicer for splicing ends of spun yarn and a method 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

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

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.

Method and device for the knot-free connection of two threads

Device for the partial straightening and parallelizing of fibers of a thread or thread end, including a turbine being drivable by compressed gas, the turbine including a rotor being accessible from outside the turbine, the rotor having a central opening formed therein being coaxial with the axis of rotation of the rotor for receiving a thread or thread end.

Device for the partial straightening and parallelizing of the fibers of

A compressed gas splicing head assembly in an automatic splicing device for producing a knot-free thread connection by splicing, includes a compressed gas splicing head having a splicing channel with two ends formed therein defining a plane of symmetry in longitudinal direction of the splicing channel, the splicing head having outlets for the splicing channel formed therein, and the splicing head having at least two compressed gas injection openings formed therein discharging in said splicing channel mutually opposite and offset to the left and right of the plane of symmetry for holding and mutually tangling, bunching, swirling and winding fibers of two threads to be interconnected, said injection openings including an injection opening disposed closest to a given portion of each respective outlet, and thread and air guides each disposed at a respective one of the ends of the splicing channel, each of the guides obstructing a respective one of the given portions of the outlets, and the threads being disposed between at least two of the compressed air injection openings.

Compressed gas splicing head

Thread splicing device, including a stationary base body having a first compressed-air canal formed therein, a splicing head being interchangeably connected to the base body, the splicing head having a second compressed-air canal formed therein being in communication with the first compressed-air canal formed in the base body, the splicing head having a plurality of air discharge nozzles formed therein being in communication with the second compressed-air canal formed in the splicing head, and the splicing head having a splicing chamber formed therein being in communication with the air discharge nozzles formed in the splicing head, the splicing chamber including a selectively coverable longitudinal slot for inserting and joining threads.

Thread splicing device

Device for tying a first thread to a second thread by splicing with pressure gas, the device having a splicing chamber formed with an elongated slot for inserting and tying the threads, at least one pressure-gas channel terminating in an interior space of the splicing chamber, a thread regulator movable from a thread take-up position to a thread delivery position for laying the thread into the elongated slot of the splicing chamber, and controllable parts including thread severing devices for separating ends of the threads, a controllable and adjustable pressure-gas dosing device connected to the pressure-gas channel, a device disposed above the splicing chamber for taking up the thread end of the second thread, a device disposed below the splicing chamber for taking up the thread end of the first thread, a controllable thread gripper for the first thread, and a controllable thread gripper for the second thread, including an opening device in the thread gripper of the second thread, and the pressure-gas channel terminating eccentrically in the interior space of the splicing chamber for forming a vortex.

Device for tying a first thread to a second thread by splicing with

Method of producing a knot-free thread connection by splicing, which includes mixing, alternately interlocking and anchoring individual fibers of the threads to be joined to each other in a first pre-splicing operation, and subsequently further and finally intertwining and anchoring the threads to each other in a separate finish-splicing operation, and an apparatus for carrying out the method.

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Monchen-gladbach, Germany

Heinz Zumfeld