Abstract: Described are, among other things, methods and devices for providing a learning procedure in a yarn feeding arrangement (12). The learning procedure aims at providing control data to the controller (32) about system components and behavior of system components of the yarn feeding arrangement beforehand, such that the controller has knowledge of the system components before the weaving machine (10) is started to operate at full operational speed.

Abstract: Described are, among other things, methods and devices for providing a learning procedure in a yarn feeding arrangement (12). The learning procedure aims at providing control data to the controller (32) about system components and behavior of system components of the yarn feeding arrangement beforehand, such that the controller has knowledge of the system components before the weaving machine (10) is started to operate at full operational speed.

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 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 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: 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: 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: 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: 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: The invention relates to a thread detector (F) for detecting thread path/halt conditions and/or thread tension. Said detector is provided with a deflector assembly for re-directing the thread, said assembly transmitting the stress on the thread to at least one transducer device (W), which generates a signal and responds to mechanically transmitted stresses. The deflector is also provided with at least one electronic evaluation circuit (6) for deriving output signals, (i1, i2) and with thread guides (8), which are located upstream and downstream of the deflector assembly and define the course of the thread. The deflector assembly comprises a first and second deflector (D1, D2) that lie one behind the other in the course of the thread, one of Which transmits the stress from the thread tension and the other the stress from the path/halt conditions to a respective transducer device (W).

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 position of rotation, the thread guiding element must be 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 relation to the axis of the motor shaft, 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: The invention relates to a yarn feeding device with a stationary storage drum and an adjustable yarn pitch. The yarn feeding device comprises a motor housing, a drive shaft of a winding element and a storage drum. Said storage drum consists of meshing finger-shaped cages. The finger-shaped advance cage has an advance bushing that is eccentric and skew with respect to the drive shaft. A backturn detent for the take-up element is mounted in said advance cage. The backturn detent is furthermore interposed between the finger-shaped advance cage and the drive shaft.

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: A measuring feeding device for an air or water jet weaving machine having a stationary storage body for a yarn store consisting of yarn windings wound on tangentially in a predetermined winding direction, from which yarn store the yarn can be withdrawn overhead of the storage body. The device includes a stop element associated with the storage body which can be moved by means of a control unit between a stop position blocking withdrawal of the yarn and a release position allowing withdrawal of the yarn, and a yarn clamping device having a displacement drive and a brake shoe which is adjustable between a lifted position and a yarn clamping position. The braking shoe, in the yarn clamping position is positioned behind the stop element in the winding direction and is maintained in the yarn clamping position after a stroke of the stop element into the release position.

Abstract: In a yarn feeding device having a winding element which is rotatingly drivable relative to a stationary housing and which has an outer, ring-like edge that overlaps an interior housing flange in an axially open gap portion, a catching element for catching dirt adhering to the inner surface of the edge is provided within an overlap at at least one point of the outer circumference of the housing flange, the catching element either projecting into the gap portion or receding from the gap portion.

Abstract: A thread feed system having a measuring feeder, a supply bobbin supplying thread to the measuring feeder and a textile machine which withdraws the thread from the measuring feeder so as to perform a weaving operation. The measuring feeder includes a storage drum and a winding element which removes the thread from the supply bobbin and winds the thread onto the storage drum. A control device is provided for monitoring the operating conditions of the thread system so as to identify increases in thread tension. The control device is operatively connected to an auxiliary conveyor device having a drivable friction roll which is frictionally engaged with the thread between the supply bobbin and the storage drum. The auxiliary conveyor device is operable so as to provide an increased frictional action on the thread so as to advance the thread at an increased rate to the storage drum so as to preparatorily counteract the thread tension increase and eliminate short picks of the thread in the textile machine.

Abstract: An insertion system for the weft yarn of a jet loom, comprising a jet insertion device in the jet loom for withdrawing the weft yarn and for transporting the same into a shed, and a weft-yarn storage, supply and measuring device arranged upstream of the jet insertion device. The weft-yarn storage, supply and measuring device including a weft-yarn stopping and releasing device which is controllable in response to a weaving cycle. The insertion system also includes a mechanical weft-yarn slip conveyor arranged in the yarn path of the weft-yarn stopping and releasing device relative to the jet insertion device, which comprises at least on conveyor roller rotating in the insertion direction of the weft yarn at a faster circumferential speed than the maximum weft-yarn insertion speed and can be deactivated while the conveyor roller is rotating during the insertion process.

Abstract: A weft-thread measuring feeder comprising a storage drum for a thread stock consisting of tangentially wound turns, from which a thread can be withdrawn overend in sections of a predetermined length. The storage drum includes a power accumulator which can be triggered from outside the storage drum for temporarily extending a spreading body which is positioned below the turns of thread stock and is defined circumferentially.

Abstract: According to a method and apparatus for controlling the insertion process of a weft yarn, the weft yarn is temporarily exposed to a braking friction and the yarn tension is mechanically picked-up. In order to prevent the friction from having a disturbing or damaging effect on the yarn, the yarn tension is only temporarily picked-up during certain phases of the insertion process, in order to derive information from the tension curve that is useful for the control of the insertion process. In a power loom, in particular a jet, rapier or gripper shuttle loom, a tension sensor for sensing the tension of the weft yarn can be switched during insertion between its sensing position and a passive position in which it does not touch the weft yarn. Preferably, the tension sensor is integrated in the insertion brake or even forms the braking element itself.