Abstract: This rapier is for drawing-in a weft yarn into a shed of a weaving loom (2), along a drawing-in path. The rapier includes a rapier head (206) mounted at one end of the rapier, which extends along a main longitudinal is driven, along the drawing-in path, by a drive. Also included is a clamp (320) for catching a weft yarn, with the clamp being mounted in the rapier head, operable between an open and closed configuration. The rapier includes an electric motor, (208) mounted on the body for actuating the clamp and a mechanism (260-328) for transforming an output movement of the motor, which is a rotation around an axis (A208) parallel to the main longitudinal axis, into an opening or a closing movement of the clamp.

Abstract: Piloted electromagnetic brake for controlling the tension of the weft threads in weaving machines, in particular of a weft thread which has a high number of knots, of the type including a pair of opposite elastic thin plates between which the weft thread runs, an operated thin plate being adjusted in position by an electromagnetically controlled operating piston, and a resisting thin plate being resistant against an elastic contrast unit, in order to control the intensity of the contrast force between the pair of thin plates. The resisting thin plate and the operated thin plate have fulcrum points in correspondence of a central portion thereof, so as to be able to freely oscillate in a plane containing the weft thread, during the passage of a knot between them, and the fulcrum points are offset by a set length along the weft thread running direction.

Abstract: A shuttleless weaving loom with a weft insertion device. A transfer device and retaining disc are connected to the weft insertion device such that the retaining disc holds the weft fiber in a fixed orientation as it traverses through the shed of the loom. A plurality of sensors which are part of a microcircuit are mounted on the retaining disc for measurement of the weft fiber's position. A signaling circuit is mounted on the shuttleless loom and an electrical connector is connected to the signaling circuit to allow for external monitoring or display of the weft fiber's position. The measurements from the plurality of sensors are communicated through the electrical connector to an external device such that the position and orientation of the weft fiber can be monitored or displayed as the weft insertion device travels through the shuttleless loom.

Abstract: Woven products using combined materials are provided. An intermittent weaving splicer terminates and combines materials having different functional and/or aesthetic properties to create woven products that reflect the different properties of the combined material. Further, a dynamic tensioner variably adjusts tension on the combined materials based on the different properties of the combined material.

Abstract: A power loom includes a frame, a plurality of warps, a weft spool, a plurality of wefts, and a speed adjustment device. The speed adjustment device includes a support rack, a rotation shaft, a drive motor, a sensor, a press member, and a press rod. Thus, when the output speed of the wefts is gradually reduced to a preset value, the wefts are tensioned and moved upward, and the press member is moved upward to touch the sensor which sends a signal to actuate the drive motor which increases the rotation speed of the rotation shaft and the weft spool to increase the output speed of the wefts largely so that the wefts can be pulled outward from the weft spool quickly to prevent the wefts from being torn or broken due to an excessive pulling force.

Abstract: A power loom includes a frame, a plurality of warps, a weft spool, a plurality of wefts, and a speed adjustment device. The speed adjustment device includes a support rack, a rotation shaft, a drive motor, a sensor, a press member, and a press rod. Thus, when the output speed of the wefts is gradually reduced to a preset value, the wefts are tensioned and moved upward, and the press member is moved upward to touch the sensor which sends a signal to actuate the drive motor which increases the rotation speed of the rotation shaft and the weft spool to increase the output speed of the wefts largely so that the wefts can be pulled outward from the weft spool quickly to prevent the wefts from being torn or broken due to an excessive pulling force.

Abstract: The tension is modulated by a weft-braking device controlled by a tension control block programmed for comparing the measured tension with a reference tension, and for transmitting a braking level signal to the weft-braking device, which braking level signal is adapted to minimize the difference between the measured tension and the reference tension. The yarn consumption speed is calculated, then the yarn consumption speed is compared with a predetermined threshold speed, and if the calculated consumption speed overcomes the predetermined threshold value, the tension control block is enabled, while, if the calculated consumption speed is lower than the threshold value, the tension control block is disabled and the last signal generated by the latter is maintained as braking signal, until the yarn consumption speed overcomes again the threshold value.

Abstract: A yarn braking device includes a braking body with the shape of a frustocone coat. The braking body is put over a rounded withdrawal end of a storage body and is pressed from the small diameter end by a resilient axial force against the withdrawal end. The axial force defines the braking effect between the braking body and the withdrawal end. Between a stationary holder and the braking body an axial force generator and a centering device acting in radial direction are provided. The axial force generator is formed by at least one pair of permanent magnets. The permanent magnets are axially aligned by the centering devices with an intermediate gap. The centering device neither is an axial sliding guiding system structurally and functionally separated from the pair of permanent magnets, or is formed free of contact directly by the pair of permanent magnets, respectively.

Abstract: A control unit for yarn-braking devices in weft feeders for looms, in which the yarn unwinding from the feeder is pressed between a drum and a braking member connected to two linear actuators controlled by position and provided with position sensors. A position control loop receives a position signal from the sensor and compares it with a reference variable in a subtracter for obtaining a position error. A position compensator receives the position error and outputs a reference current entering a current control loop connected to generate a voltage that supplies the actuator. The compensator incorporates a control transfer function that is variable as a function of an elastic constant of a mass-spring equivalent system, where the mass is the mass of the parts in motion between the braking member and the actuators, and the elastic constant matches with the elastic constant of the elastic elements.

Abstract: A thread stretching device for a weaving machine, especially an air jet weaving machine, includes a thread gripper (22) for gripping the weft thread (10) as a device for stretching a weft thread inserted into a shed. A mechanism (23) for deflecting the weft thread is arranged upstream of the thread gripper, relative to the weft thread transport direction.

Abstract: A thread clamp for a rapier head (1) is presented which contains a clamping part (4) for firmly clamping a weft thread (3) and an actuator (5) for moving the clamping part (4). The actuator (5) includes a ferromagnetic core (12), an armature (11) and at least one winding (13) which is arranged on the core or armature in order to produce a magnetic field in the latter and to move the armature and the clamping part, which is operatively connected to the latter, with the core (12) having two limbs (12.1, 12.2) between which the armature (11) is movably arranged, and with each limb being provided with a permanent magnet (14.1, 14.2) in order to hold the armature at one of the two rest positions in the current-free state of the winding.

Abstract: Method for introducing a weft thread (4, 5) in an air weaving machine, which method comprises controlling the instant when the supply of compressed air to a set of auxiliary blowers (13, 14, 15, 16) is interrupted based on measurements on the transported weft thread (4, 5) during transport of this weft thread (4, 5). Air weaving machine provided with auxiliary blowers for applying the method.

Abstract: A projectile-weaving machine is equipped with a weft yarn feeder having a stationary storage body for intermediately storing a yarn store consisting of windings, the weft feeder comprising a passive hollow balloon breaker functionally associated to a withdrawal rim of the storage body. In addition to the passive balloon breaker, several yarn control elements are separated in circumferential direction for being actively moved by a drive from an outer rest position into an inner operative position which without totally stopping withdrawn weft yarn are brought into a mechanical engagement on the weft yarn upstream from the withdrawal rim and starting with an end phase of an insertion on the weft yarn while the weft yarn is taken off from the yarn store over the withdrawal rim.

Abstract: The support is provided for the reed of a seam weaving machine used for joining two opposite ends of a synthetic fabric by means of a woven seam. The reed is provided with pivotally mounted reed dents (22) for sliding seam weft threads to the fell. The support comprises a tilt strip (24) and a pressure strip (30) which are disposed at a distance from the bearing mechanism (20) and apply opposite torques to the reed dents (22), as well as devices (26, 32) for positioning the tilt strip (24) and the pressure strip (30) at angles relative to the bearing mechanism (20) in order to stagger the reed dents (22) in the position thereof by means of the tilt strip (24) and the pressure strip (30) so as to operate the machine in a first mode of operation. A roll is also provided which can be moved along a track across the width of the reed in order to successively swivel the reed dents (22) towards the fell so as to operate the machine in a second mode of operation.

Abstract: A thread brake arrangement for use in a textile processing machine includes two brake elements with the thread running there between. An actuator, preferably a piezoelectric actuator, variably actuates one of the brake elements relative to the other to exert an adjustable braking force onto the thread. The thread exerts a reaction force in the thread running direction onto the brake elements. At least one of the brake elements is movably supported to be movable along the thread running direction, and is mechanically coupled to a force transducer that measures the reaction force, which is proportional or equal to the thread tension force. A regulating arrangement receives the measured force signal, and controls the actuator to adjust the adjustable brake element, so as to vary the applied braking force and thus regulate the arising thread tension responsive to and dependent on the measured reaction force.

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 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 measuring apparatus for the measurement of the cloth tension in weaving machines comprises a probe element and a guide part to which the probe element is connected in order to guide the probe element. The measuring apparatus furthermore comprises a holder to which the guide part is secured and a sensor element which is in contact with the probe element in such a manner that a force which acts on the probe element causes a corresponding change in the sensor element. In this the guide part is attached at one side to the holder, the probe element is spaced from the attachment of the guide part, and the measuring apparatus is executed as a module.

Abstract: A weft end recovery apparatus comprises weft end carrier for carrying by water flow weft ends formed as a result of weft insertion, a plurality of storing and dewatering sections to receive the weft ends carried from the weft end carrier together with the water, and switching mechanism for selectively switching the storing and dewatering sections to store the weft ends and the water from the weft end carrier.

Abstract: A supply spool supplies a weft thread through an adjustable actuated thread brake and a thread tension sensor to a weft thread accumulator, from which an accumulated insertion length of the thread is provided to a weft insertion device. The tension sensor provides a measured actual thread tension signal to a control arrangement, which compares the actual tension to a selected rated tension, and, dependent on the deviation therebetween, provides a control signal to an actuator of the thread brake, so that the actual thread tension constantly corresponds to the selected rated tension. Another sensor provides a signal indicating a change from an empty spool to a full spool. Responsive thereto, the control arrangement actuates the thread brake to an adjustable starting brake setting as a coarse adjustment. Then the self-regulating fine adjustment is continued. A constant winding tension and thread accumulation length are achieved in the thread accumulator.

Abstract: A weft holder device holds the free weft thread ends in an air jet loom, using pressurized air and without requiring a suction device. The body of the device has a tapering opening through which the end of the inserted weft thread extends. The opening tapers into a narrower slot in the beat-up and drawing-off direction. An air flow channel communicates downwardly from the slot. Nozzles blow pressurized air downwardly through the slot and into the channel, to pneumatically push the weft thread ends into the channel, so as to hold the weft thread ends from when they are beat-up and bound into the woven cloth and a catch selvage, until the catch selvage is trimmed from the cloth. The weft holder device may be stationarily mounted at a location between a weft detector and a weft tensioner that are connected to the reed so as to move therewith.

Abstract: A yarn tightening element for a weaving machine, comprising a passage (16) for a yarn (15) and a contact means (2) to transmit a tightening force to a yarn (15) moving along through this passage, the passage (16) being not bordered on at least one side of the plane of movement of the yarn (15) or comprises a boundary (14) that is interrupted across its width, so that a part of the yarn (15) running through from that side of the plane of movement, via the interruption (17), can be made to co-operate with the contact means (2).

Abstract: A loom with an insertion brake disposed between a yarn feeder and the shed of the loom, which insertion includes a movable brake element, which is capable of movement between two fixedly disposed yarn guides from a position of rest on one side of the yarn to an operative position on the other side of the yarn. The movable brake element is connected to a driving motor, the excitation of which is controlled by an electronic system, in which at least one program for the time and the position of the movable brake element is incorporated. The electronic system includes a position detection sensor for sensing the instantaneous position of the brake element.

Abstract: A tack-in apparatus is provided wherein injection ports are arranged at upper and lower sides of a weft yarn path, respectively. The injection ports inject currents for folding back an end portion of a cut weft yarn into a warp yarn opening on the weft yarn path which the weft yarn passes by a beating operation. Air guides projecting toward the warp yarn opening are formed at circumferential portions of the injection ports between the weft yarn path and the injection ports. The surfaces of the air guides which are on the sides of the injection ports are inclined toward the weft yarn path at front end portions of the air guides. In order to tack in the weft yarn end, the injection air currents are directed to the central portion of the warp yarn opening. This enables the weft yarn end to be transferred reliably, the tack-in operation to be carried out reliably, and the turbulence of the warp yarn to be reduced.

Abstract: A method for monitoring the cycle of the weft insertion into a weaving machine. The weft yarn passes a yarn brake and a yarn force sensor and the force acting on the weft yarn is measured in a known fashion and the reaction force of the yarn is converted by a pressure sensitive element into an electrical signal. The electrical signal outputted by the yarn force sensor is electronically amplified in an evaluation unit, is evaluated and is transmitted to an indicator informing the operator of the development of the weft insertion and of disturbances and corrections. For this purpose, the evaluation unit is connected via a data line with a machine control unit. Evaluation unit is supplied with time signals from the machine control unit associated with further machine functions participating at the weft insertion, e.g. the momentary angular position of the main shaft of the machine. The machine control unit receives monitoring signals of the yarn force evaluation via the data line, e.g.

Abstract: A brake arrangement is intended for or can be assigned. to a number of threads or yarns which can be fed in or to a textile machine, for example a weaving machine. The brake arrangement comprises two units (1,2) which have thread or yarn parts (11, 12, 13, 14, 15, 16, 17) lying between them and which are pressed towards each other by actuating members (3, 4, 5, 6 and 7, 8, 9, 10, respectively), which units (1, 2) cooperate with the thread or yarn parts via two opposite surfaces (1a and 2a, respectively) which are made of smooth material and are set substantially parallel by the cooperation with the thread or yarn parts. The actuating member is arranged to exert, via the unit, press forces (F) on the thread or yarn parts which are substantially identical, on the one hand, on the different thread or yarn parts and, on the other hand, along at least part of the length of the respective thread or yarn part.

Abstract: At least one of two flexible leaf springs that form a thread gap is controlled by a linearly moveable element of a linear motor or drive. Multi-thread brakes are formed by assembling a plurality of such brakes on a common support whereby a single stator may cooperate with a plurality of linearly moveable armatures forming a corresponding plurality of thread brakes or each thread brake may have its own stator and its own armature arranged in a row either linearly or along a curved support, whereby a compact structure is achieved.

Abstract: A yarn processing system including a feeding device, a power loom, a controllable yarn tension device which is situated downstream from the feeding device, and a tensiometer which supplies a signal that represents the yarn tension and which is arranged downstream from the yarn tension device. The tensiometer includes a separating device which can be adjusted between a passive position and a separating position and with which a temporary separation between the tensiometer and the weft yarn can be effected in order to generate a zero yarn tension signal for a signal analysis device. In addition, the weft yarn is temporarily separated from the tensiometer probe during the interval between successive insertion operations, and a calibration is carried out for a future control operation by using the zero yarn tension signal.

Abstract: A regulator works with a thread or yarn supply which is intended to provide a draw-out length of the thread or the yarn which is dependent on the one hand on the size of the supply and on the other hand on an assumed or adjusted thread tension in the draw-out thread or the draw-out yarn. A load cell is arranged so as to sense the actual thread tension in the drawn-out thread and to, supply to the regulator information for changing the size of the thread stock when the actual thread tension deviates from the assumed or previously adjusted thread tension (the desired value). The load cell can also function as a pick monitor.

Abstract: A method for controlling electrically actuated weft brakes for automatically adjusting mechanical tension of a weft thread in textile machines with mechanical insertion, comprising the steps of: generating and modulating an excitation current of an actuator of an electrically actuated brake. The above step is performed with a device which comprises a control chip which is sensitive both to variations of mechanical tension measured on the left thread and to an actual value (v) of a travel speed of the weft thread during insertion; the control loop is adapted to recondition a reference parameter of the braking action, determined by the control loop on the basis of a reference tension and a measured tension, with a multiplication factor which is represented by a decreasing function [f(v)] of the actual value (v) of the travel speed of the weft thread.

Abstract: The weaving machine contains an insertion system for a plurality of generally different weft threads, which comprises for each weft thread a thread supply (2), a thread store (3) and a color selector (4) for the selective serving of the weft threads as well as a rapier (10) for inserting the served weft thread. At least one common thread brake (7) is provided for all weft threads (1) in order to brake the respective served weft thread (1) during the insertion as required. In addition to the simple mechanical construction, the simple handling and controlling are seen as advantageous.

Abstract: At least one of two flexible leaf springs that form a thread gap is controlled by a linearly moveable element of a linear motor or drive. Multi-thread brakes are formed by assembling a plurality of such brakes on a common support whereby a single stator may cooperate with a plurality of linearly moveable armatures forming a corresponding plurality of thread brakes or each thread brake may have its own stator and its own armature arranged in a row either linearly or along a curved support, whereby a compact structure is achieved.

Abstract: A brake arrangement is intended for or can be assigned to a number of threads or yarns which can be fed in or to a textile machine, for example a weaving machine. The brake arrangement comprises two units (1, 2) which have thread or yarn parts (11, 12, 13, 14, 15, 16, 17) lying between them and which are pressed towards each other by actuating members (3, 4, 5, 6 and 7, 8, 9, 10, respectively), which units (1, 2) cooperate with the thread or yarn parts via two opposite surfaces (1a and 2a, respectively) which are made of smooth material and are set substantially parallel by the cooperation with the thread or yarn parts. The actuating member is arranged to exert, via the unit, press forces (F) on the thread or yarn parts which are substantially identical, on the one hand, on the different thread or yarn parts and, on the other hand, along at least part of the length of the respective thread or yarn part.

Abstract: A regulator (4) works with a thread or yarn supply which is intended to provide a draw-out length of the thread or the yarn which is dependent on the one hand on the size of the supply and on the other hand on an assumed or adjusted thread tension in the draw-out thread or the draw-out yarn. A load cell (7) is arranged so as to sense the actual thread tension in the drawn-out thread and to supply to the regulator (4) information (i1) for changing the size of the thread stock when the actual thread tension deviates from the assumed or previously adjusted thread tension (the desired value). The load cell can also function as a pick monitor.

Abstract: A woof yarn tension device for weaving machines, has a controllable tension device which acts upon the woof yarn and which, at least on the output side, has a yarn guide eye. In order to reduce the stressing of the woof yarn, the number of the deflection points for the woof yarn existing on the feeding side are reduced in that the yarn guide eye of the woof yarn tension device is simultaneously constructed as a woof yarn monitor.

Abstract: A tensioner for gripping an inserted thread in a weaving shed and applying or removing tension based on the thread's inserted tension. Through the use of sensors in a thread gripper, the inserted thread tension is compared to a desired value in a controller which controls the direction of rotation of a drive motor connected to the tensioner. A thread positioner which cooperates with the gripper assures that the threads are repeatedly gripped at the same general location. This expedites the detection of the inserted tension and avoids false initial tension readings.

Abstract: An apparatus for stretching and tensioning of a weft thread including a nozzle (6) for producing an air flow directed substantially transversely to a weft direction for deflecting a weft thread with respect to the weft direction; and a reception channel (8) for reception of a deflected weft thread, which is arranged at a distance from the nozzle with the nozzle (6) having at least one nozzle hole (14) and with the nozzle (6) being adjustably arranged in the weft direction relation to the reception channel (8).

Abstract: An arrangement for the holding of a weft thread for a series shed weaving machine has a holder apparatus (11) for the weft thread (4). Two forwarding elements (12, 13) are arranged at both sides of the holder apparatus and are movable relative to the holder apparatus in order to introduce the weft thread. The weft thread (4) extends transversely to the holder apparatus and transversely to the holder apparatus and transversely to the direction of movement of the forwarding elements, into the holder apparatus and furthermore, an apparatus (14) in order to catch and to tension the weft thread. The holder apparatus comprises a thread clamp (15) with a stationary clamping part (17) and a movable clamping part (18) which is under spring action and which forms a clamping gap (27). The weft thread is held in a stretch state by the forwarding elements (12, 13) and the apparatus (14) and is displaceable transversely through the clamping gap.

Abstract: A weaving machine with pneumatic weft insertion is provided which includes a fixed reed filler at an output end of a reed when it is in a weft insertion position. A catch salvage forming device is disposed at an output end of the fixed reed filler when the reed is in the weft insertion position and serves to keep the inserted weft stretched during movements of the reed between a weft insertion and a beating up position. In order to shorten the overall length of the assembly, a weft stop motion for detecting the insertion of the weft is located on the fixed reed filler.

Abstract: A weft yarn end removing mechanism is incorporated into a shuttleless loom that holds leading end part of a picked weft yarn under tension by a weft yarn tightening device and beats up the weft yarn into the cloth fell of a fabric on the shuttleless loom by a reed. The weft yarn end removing mechanism includes a weft yarn sucking device for holding the leading end part of the weft yarn beaten up into the cloth fell, and a weft yarn cutting device for cutting the leading end part of the weft yarn extending between the selvage of the fabric and the weft yarn sucking device. The leading end part of the picked weft yarn being shifted toward the cloth fell is sucked through a first suction opening into the weft yarn sucking device and then the leading end part moves from the first suction opening to a second suction opening of the weft yarn sucking device.

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 the method a weft thread which is supplied via a thread brake and a thread presenter is inserted into a shed by means of rapiers with a thread clamp, with the thread clamp being set in a freely selectable manner for each weft insertion during the weft insertion. This makes it possible to insert weft yarns of different types and thickness into a shed. The system comprises a rapier (1) with a thread clamp (4) and an arrangement (4) with a first apparatus (11) for setting the thread clamp and with a second apparatus (21) for the actuation of the first apparatus.

Abstract: A movable brake shoe (32) is mounted in a yarn brake (23). The yarn brake (33) includes two brake shoes (31, 32) arranged to brake a yarn (3) running between them. Actuating devices (33, 34) allow mutual compression of the brake shoes (31, 32). The movable brake shoe (32) is lamellar and tiltable about a tilt axis (49) which is located at a distance from and substantially parallel to the path of the yarn (3) to be braked.

Abstract: A weft thread clamp for a weft thread presenting lever is positively actuated to selectively open or close the clamp and thereby release or hold the weft thread respectively. To achieve this, a second clamp element is movable or deflectable relative to a first clamp element of the clamp. The movable second clamp element may be directly embodied as an actuator, or may be driven by an actuating motion provided by an actuator located remotely from the clamp on the lever. In the latter case, a motion transmission arrangement such as a sheathed push-pull cable or a rod linkage operatively connects the actuator to the movable second clamp element. The actuator may be a piezoelectric, electromagnetic, hybrid pneumatic-electric, or hybrid hydraulic-electric device, or an electric motor. The loom control unit is connected to the actuator for providing control signals thereto.

Abstract: A thread clamping device, particularly for the figuring weft threads on jacquard machines, in which figuring weft threads, e.g. those on jacquard looms, are only picked from time to time corresponding to the figured form of the woven jacquard fabric, with the figuring weft threads being held under tension and released as required, during their stationary period, by thread clamping devices which are controlled via the harness thread of the associated figuring weft cord heald.

Abstract: During weft yarn insertion in a loom, as the end of weft yarn insertion approaches, a controllable yarn deviation brake (B), positioned between a weft feeder (M) and a warp shed (F) of a loom (D) brakes the weft yarn (Y) with a high braking force, causing a deviation of the yarn deviation brake which subsequently smooths down a tension peak of the yarn, so as to partially reduce the yarn brake deviation back towards the starting position, or position having no deviation. The same function is performed upon cutting of the weft yarn (Y). After braking and reduction of the yarn tension peak, during the weft insertion step, the braking force is reduced to a level correlated to the yarn tension which prevails up to cutting of the weft yarn (Y).

Abstract: A device for feeding an elastically extendable yarn to hosiery knitting machines, which includes a positive yarn feeder composed of two mutually opposite contrarotating rollers which have parallel axes and between which the yarn to be fed passes. Elements are provided for rotationally actuating at least one of the rollers about its own axis with a rotation rate which can vary on command. Downstream of the positive feeder along the yarn feed direction, there are arranged elements for detecting the tension of the yarn and a programmable control and monitoring unit which is operatively connected to the detector elements. The control and monitoring unit compares the yarn tension detected by the detector elements with a yarn tension which is preset in the control and monitoring unit.

Abstract: A weft stretching and detecting device for a pneumatic weaving loom has a housing or mounting (6) with a weft guide channel section (8) in axial alignment with the weft insertion channel (2A) in the reed (2) of the loom and a weft stretching channel section (12) also in said housing or mounting (6). A single weft stop motion device (13) is constructed and positioned for detecting a weft insertion fault either in the guide channel section (8) or in the stretching channel section (12).

Abstract: A weft stretching and detecting device has a first section (1A) for stretching a weft thread and a second section (1B) for monitoring the arrival of a leading weft end (11A) either through a weft guide path (4, 7, 7B) which is aligned with a weft insertion channel (2A), or through a weft stretching guide channel (6, 9, 8) which is laterally displaced relative to the weft insertion direction defined by the weft insertion channel. The weft monitoring second section (1B) is mounted in a sley extension (3A) for a sliding movement axially back and forth along the sley extension (3A), whereby a spacing between the first section (1A) and the second section (1B) is adjustable. A single weft stop motion device (10) is mounted in the weft monitoring second section (1B) for monitoring the weft guide path and the weft guide channel for the arrival of a weft thread leading end through the guide path or through the guide channel.

Abstract: A method for cutting a selvedge on a weft thread insertion side of a rapier loom equipped with a weft thread supply by creating a free space of warp threads arranged separately from a main warp body. The weft thread is inserted through an open shed of the warp body. The inserted weft thread is beaten, and inserted into a holding device which subjects it tension. The wet thread is cut after being beaten and while subject to tension. The end of the weft thread is inserted it into the open shed of the warp after the cutting.