Abstract: A device for texturing a thread-like plastic material in order to form a crimped textile yarn, comprising a texturing unit having at least two texturing channels for forming respective yarn plugs, wherein the texturing channels extend in the texturing unit along respective axes which converge in the direction of the discharge openings. The device preferably also comprises a discharge channel in order to guide the yarn plugs from the texturing channels to a moving conveying surface in a converging manner.

Abstract: The invention concerns a yarn brake (B) comprising a brake (L) electromagnetically stressed against a fixed braking surface (17), a housing (1) whereon the cover bearing the brake (L) is mounted such that it is capable of being lifted relative to the fixed braking surface (17), and at least an adjusting arbor (S) controlling the lifting movements of the cover, said arbor being mounted on the housing (S) in geometric association to the path of the yarn (W). The invention is characterised in that the cover is a flap cover (K) mounted so as to be capable of being lifted about the adjusting arbor (S) for completely clearing the braking zone (12) of the yarn tension device (B).

Abstract: The invention relates to a method for inserting weft yarn material, comprising an insertion system in a loom. According to the invention, for every insertion the insertion system (A) is supplied with a substantial part of the weft yarn required for the insertion in a loose and substantially tension-free manner so as to be intermittently pulled off. A tubular package of adjacent windings is produced from the weft yarn material on an inner mechanical support (S) by way of an at least substantially continuous winding process and is conveyed forward in withdrawal direction. For an insertion, a number of windings that corresponds at least approximately to the weft yarn section intended to be inserted is detached or set free from the support while maintaining its tubular configuration without yarn tension. The weft yarn material is withdrawn directly inwardly from the frontmost winding and then further along the tube axis (X).

Abstract: The invention relates to a pneumatic thread stretcher (T) for a rapier weaving machine or a knitting machine, in which the air current deflection surface (19) for deflecting the thread (Y, Y1) forms a seamless extension (12) of the inner wall of the linear guide channel, through which the thread runs. The invention also relates to a device (H) for changing the flow rate or the pressure of the air current along the deflection surface (19) of the pneumatic thread stretcher (T) between at least two different levels, in accordance with the operating cycle o the textile machine.

Abstract: The invention relates to a method for inserting weft yarn material, comprising an insertion system in a loom. According to the invention, for every insertion the insertion system (A) is supplied with a substantial part of the weft yarn required for the insertion in a loose and substantially tension-free manner so as to be intermittently pulled off. A tubular package of adjacent windings is produced from the weft yarn material on an inner mechanical support (S) by way of an at least substantially continuous winding process and is conveyed forward in withdrawal direction. For an insertion, a number of windings that corresponds at least approximately to the weft yarn section intended to be inserted is detached or set free from the support while maintaining its tubular configuration without yarn tension. The weft yarn material is withdrawn directly inwardly from the frontmost winding and then further along the tube axis (X).

Abstract: The invention relates to a yarn processing system comprising a textile machine and at least one yarn feeding device, which are assigned to the peripheral auxiliary devices wherein the yarn feeding device has a computerised control device that is connected by signal transmission to the auxiliary device. At least certain auxiliary devices have at least one component configured in such a way that they generate and/or receive signals. The yarn feeding device has at least one local, autonomous communication bus system for the transmission of serial data at least from and/or to the auxiliary devices, said bus system being connected to the control device.

Abstract: The invention relates to a yarn feeding device (F) for weaving or knitting machines whose winding element (W) is driven by an electric motor (M) controlled by an electronic speed control device (CU). According to the invention, the electric motor (M) is a synchronous motor, in particular, a permanent magnet (PM) motor with the speed control device (CU) provided for effecting a permanent vector control with the stator being sinusoidally acted upon. Continuously determined information pertaining to the relevant rotational position of the rotor (R) of the motor (M) is used in the speed control device (CU), which serves to perform permanent vector control, in order to adjust at least one predetermined rotational position (X1, X2) of the winding element (W).

Abstract: The invention relates to a yarn processing system, comprising a yarn feeder (F), a textile machine (M), at least one controlled yarn brake (B) and a tensiometer, which senses the yarn downstream of said yarn brake, for at least measuring the yarn tension (g). According to said invention, the tensiometer (T) is permanently arranged within the yarn path, can be adjusted between a passive position (I) and at least one deflection position (II, III) and can be readjusted from said detection position (II, III) to the passive position (I) after a number of weft cycles, which number suffices to represent at least the proper adjustment of a yarn tension target profile.

Abstract: A thread supplying device provided with a housing containing an electric motor wherein the stator is non-rotatingly mounted and the rotor is rotatingly mounted on a motor shaft. A thread guiding element is fixed to the motor shaft and a threader device which is fixed to the housing is also provided. When the motor shaft is in a set rotational position, the thread guiding element is physically associated with said threader device. A permanent magnet motor with pole cores provided with windings is integrated into the stator and permanent magnets are integrated into the rotor in such a way that the stator, rotor and the thread guiding element are arranged relative to the housing, in such a way that the motor shaft adopts the set position of rotation when the permanent magnet motor is devoid of electric current in a stable relative position of rotation, caused by magnetic forces, of the rotor in the stator.

Abstract: A weft yarn deflection brake including a braking element 5 which can be adjusted in timed fashion and by its variable braking force, a drive motor 6 for said braking element and a control device CU connected with said drive motor 6 is equipped by a position detection means E associated to said braking element 5. Said position detecting means E is connected to an adjustment means 9 for functional parameters of the deflection brake. During operation functional parameters as e.g. the braking force and the time of the activation of the deflection brake are varied adaptively in order to assure a performance of the deflection brake which is deemed to be optimal for the insertion system. At selected points in time known target positions of the braking element are set and compared with the actual positions. In case that deviations are detected a respective functional parameter is varied.

Abstract: A device for controlling and monitoring a yarn processing system, which comprises an electronic main control unit and at least one yarn feeding unit, and inside of which a serial communications field bus system is provided with at least one field bus for carrying out communication. At least one bi-directional event line is provided outside the field bus system in order to transmit a time critical and/or time-specific, digital and anonymous event signal for carrying out and/or confirming events. For at least one communication participant connected to the field bus system, an event specific characteristic feature of respective event signal can be defined by the software side configuration inside the field bus system.

Abstract: A feeding device for a mechanical weaving machine, including a winding element which can be driven in a rotating manner, a stationary storage, and at least one stop element. The stop element can be axially and radially moved in relation to the storage body, between an unwinding position releasing thread yarn and a stop position wherein the stop element is applied to the foremost winding and which ends the weft insertion. A yarn clamp is arranged downstream from the stop element, which initiates the respective weft insertion, and which can be switched between a passive position and a clamping position. The storage body has a small diameter, and the stop element is moved axially to the stop position solely by the windings due to a transport motion of the windings on the storage body.

Abstract: A yarn processing system includes a weft yarn feeding device with a control unit and a power loom which consumes weft yarn. In operation, a run-signal is generated by the power loom that initializes the start-up of the weaving operation. A start-signal that is derived from the run-signal is transmitted to the feeding device. The start-signal is generated externally of the feeding device. The drive motor of the feeding device is driven at a predetermined speed, after receiving the external start-signal in order to prevent an undesired reduction of the size of a yarn store by the initial consumption demand of the start-up of the weaving operation of the power loom. A signal transmitting connection is provided in the yarn processing system between the power loom and a control unit of the feeding device for transmitting the start-signal.

Abstract: The invention relates to a method for the control of a power-loom yarn feed device, whereby a drive motor for a rotating winding element is accelerated, decelerated or stopped, on demand, for yarn storage and, in order to avoid slack yarn during the stopping of the motor, the motor is independently driven slowly during a crawl phase, such that the motor is first stopped and then after stopping is slowly rotated in the crawl phase.

Abstract: In a monitoring device used for the weft thread of a weaving machine, which comprises at least one insertion element having a thread clip movable to a thread-release position, and comprising a weft thread detector, which is used for monitoring the movement of the weft thread and which, during each insertion, is activated only for an observation interval ending at least approximately with the release of the inserted weft thread by the thread clip, an electric sensor (S) is provided in an opening device (B) arranged in the weaving machine and used for opening the thread clip (G) of the insertion element, said sensor (S) responding to the release position of the thread clip with a signal (i) representative of the end of the observation interval.

Abstract: A method for controlling the motion of a yarn stopper magnet in a measuring feeder for textile machines, preferably for weaving machines of the air-or waterjet-type. The stopper magnet has an armature connected to a yarn stopper element, which armature co-acts with at least one electromagnetic coil in order to achieve the desired motion of the stopper magnet. During an initial part of the motion of the stopper element, the electromagnetic coil is supplied with a voltage with an amplitude considerably exceeding the average level of the voltage during the remaining part of the motion, in order to achieve an optimally fast motion with a low input energy amount and thereby a low heat development, as well as low kinetic energy (speed) of the stopper element at the end of its motion.

Abstract: The invention relates to a method for controlling a yarn processing system comprising a textile machine, a yarn feed device and a supply spool. According to the inventive method, the yarn feed device pulls the yarn from the supply spool with varying speed and forms and maintains a yarn intermediate store. In addition, a rotatable supply spool (B) is turned at least by the yarn tension elicited by the winding drive (4) of the yarn feed device (F), and the yarn (Y) is tangentially removed from the supply spool (B).

Abstract: A method for inserting a longitudinally elastic yarn from a yarn supply into a shuttleless weaving machine. The yarn is first removed with positive yarn feed from the yarn supply. Afterwards, the yarn in intermediately stored in adjacent windings with a predetermined elongation while using a winding speed that is synchronized with the positive feed speed, and for each insertion process, the yarn is released only with a predetermined insertion length.

Abstract: A method and apparatus for feeding a thread to a textile machine in a twist-free manner, which thread has a band-like character. The thread is taken twist-free from a stock and is stored on a stationary storage drum in a thread feeding apparatus. The thread feeding apparatus has a rotatable central shaft and a winding element which protrudes therefrom. During operation of the thread feeding apparatus, functional twists are produced in the thread only during the transition from the central shaft into the winding element. The twists are inhibited from being transported oppositely to the thread path direction and are regularly conveyed to the storage drum in almost perfect match with the rotations of the central shaft. At least one guide gap that is stationary in relation to the central shaft is provided along the thread path in the area of transition of the central shaft into the winding element.

Abstract: A method of monitoring the weft yarn run/stop conditions during each insertion cycle in a shuttle-less weaving machine like a rapier or projectile weaving machine by means of an electronic weft yarn feeler generating run output signals representing said weft yarn run condition, said weft yarn feeler including means to adjust the working sensitivity level, comprises that the present working sensitivity level effectively used for confirming run output signals continuously and automatically is adjusted during operation of the weaving machine to oscillate about an optimum and safe working sensitivity level by observing within a predetermined restricted observation interval of each insertion cycle the signal stability at an observation sensitivity level lower than the present working sensitivity level and by lowering or raising both said present working and observation sensitivity levels in dependence from output signal stability.