Abstract: A selvedge tucker for the formation of a cloth edge in a weaving machine is presented which includes a selvedge tucking needle and a first drive implemented as an electrical drive which moves the selvedge tucking needle during normal operation of the weaving machine for tucking one or more weft thread ends into a shed formed on the weaving machine, wherein the selvedge tucker includes a second drive moving the selvedge tucking needle into a safe position in the event of a disturbance of the first drive and/or a deactivation of the first drive in order to prevent accidental contact between the selvedge tucking needle and other components of the weaving machine.

Abstract: A method for the insertion of a weft thread (2) into a shed of an air jet weaving machine (1) is presented in which the weft thread drawn from the thread store (21) is accelerated by means of an acceleration nozzle (3, 4) and supplied to the shed; the weft thread is transported further in the shed by means of a plurality of auxiliary nozzles (5.1 a-c to 5.n a-c); and measured values dependent on the speed of the weft thread and/or on the path traveled by the weft thread are measured in contact-free manner by means of one or more measurement pickups (7.1, 7.2, 17). In the method at least one of the measurement pickups is formed for multiple measurement within the weft insertion and is arranged at or after a first acceleration nozzle (3). Furthermore, measured values are measured in contact-free manner a plurality of times during the weft insertion by means of the at least one measurement pickup (6, 6.1-6.

Abstract: A weaving machine for the manufacture of leno cloths includes a leno apparatus with leno elements (5, 5?, 7, 7?, 8, 8?) for the forming of a shed (6) as well as additionally a cleaning apparatus with a plurality of nozzles (10.1, 10.2, 11, 13) for the removal of contaminations in the region of the leno apparatus and of the shed (6). Two of the nozzles (10.1, 10.2) are arranged above the shed, by means of which a compressed air flow (16.1-16.4) which is directed downwardly through the shed (6) from above is produced, and one of the nozzles (11) is arranged in the lower region of the leno elements, by means of which a compressed air flow (17) which is directed substantially horizontally towards the leno elements (5, 5?, 7, 7?, 8, 8?) is produced. In addition, a suction nozzle (13) by means of which a downwardly directed suction air flow (19) is produced is arranged beneath the shed.

Abstract: A selvedge tucker for the formation of a cloth edge in a weaving machine is presented which comprises a selvedge tucking needle for tucking in one or more weft thread ends into a shed as well as an electrical drive for moving the selvedge tucking needle, with an emergency operating system and/or emergency drive being provided for the selvedge tucking needle in order to move the latter into a safe position in the event of a disturbance.

Abstract: A weaving machine for the manufacture of leno cloths includes a leno apparatus with leno elements (5, 5?, 7, 7?, 8, 8?) for the forming of a shed (6) as well as additionally a cleaning apparatus with a plurality of nozzles (10.1, 10.2, 11, 13) for the removal of contaminations in the region of the leno apparatus and of the shed (6). Two of the nozzles (10.1, 10.2) are arranged above the shed, by means of which a compressed air flow (16.1-16.4) which is directed downwardly through the shed (6) from above is produced, and one of the nozzles (11) is arranged in the lower region of the leno elements, by means of which a compressed air flow (17) which is directed substantially horizontally towards the leno elements (5, 5?, 7, 7?, 8, 8?) is produced. In addition, a suction nozzle (13) by means of which a downwardly directed suction air flow (19) is produced is arranged beneath the shed.

Abstract: A system for inserting a weft thread into a shed of an air jet weaving machine includes a thread store with a measuring apparatus, a plurality of air nozzles for the insertion of the weft thread and a control system which is connected to the measuring apparatus in order to be able to control the compressed air supply of the air nozzles in dependence on measurement values of the measuring apparatus. Switch-on points are associated with the air nozzles, with the control system charging one or more of the air nozzles with compressed air as soon as a predictor value for the position of the weft thread tip, which is formed with the help of the measurement values, reaches the switch-on point of the relevant air nozzle or air nozzles respectively.

Abstract: A weaving machine for the manufacture of leno cloths includes a leno apparatus with leno elements (5, 5?, 7, 7?, 8, 8?) for the forming of a shed (6) as well as additionally a cleaning apparatus with a plurality of nozzles (10.1, 10.2, 11, 13) for the removal of contaminations in the region of the leno apparatus and of the shed (6). Two of the nozzles (10.1, 10.2) are arranged above the shed, by means of which a compressed air flow (16.1–16.4) which is directed downwardly through the shed (6) from above is produced, and one of the nozzles (11) is arranged in the lower region of the leno elements, by means of which a compressed air flow (17) which is directed substantially horizontally towards the leno elements (5, 5?, 7, 7?, 8, 8?) is produced. In addition, a suction nozzle (13) by means of which a downwardly directed suction air flow (19) is produced is arranged beneath the shed.

Abstract: A method for the weft insertion in a jet weaving machine is proposed, in which in each work cycle a weft thread (S1) of predeterminable length which is to be inserted is drawn off from a winding drum (3) of a thread supply apparatus (2), the weft thread (S1) is inserted into an open shed (17) by means of a main nozzle (11) which is fed with a transport medium, is bound in into the cloth (G) through the change of shed, and is severed at the cloth edge which is near the main nozzle (11). In each work cycle the drawing off of the weft thread (S1) to be inserted is interrupted at least once in such a manner that at first a first predeterminable thread length is released for the drawing off from the winding drum (3) and then at least one further predeterminable thread length is also released for the drawing off from the winding drum (3).

Abstract: The weaving machine comprises a needle bar (3) and an insertion-element (4) with which warp threads (13, 14) are guided and which are two components of a shed forming apparatus for the manufacture of leno cloths (1). The two components are moved vertically in a reciprocal manner. A horizontal displacement movement (40b) transverse to the direction of the warp thread is executed with the insertion element in addition to the vertical movement (40a) The movements of the two components cause a leno binding to take place in interplay with the insertion of a weft thread (12, 12?). The shed forming apparatus can be modified such that, on the one hand, the horizontal displacement movement (40b) of the insertion element is switched off and, on the other hand, for both components a stroke (h) of the vertical movement (30, 40a) is in each case increased and controlled in such a manner that a cloth without leno binding, in particular a simple cloth (1?), can be manufactured.

Abstract: An apparatus at a weaving machine serves for the protection of persons in danger regions which extend about a beat-up edge along a weaving width and beyond the latter. In this apparatus, monitoring means which emit and register light beams are arranged about the danger regions. Signals which arise as a result of an encroachment into the danger regions and through which an operating stop of the weaving machine can be triggered can be produced in the monitoring means by means of the light beams. First monitoring means are associated with a more comprehensive region and second monitoring means are associated with a central region, the actual danger region. During a normal operation of the weaving machine the first monitoring means are in an active state which ensures the protection. An activation of the second monitoring means is provided for use during activities which are occasionally to be carried out at the weaving machine within the more comprehensive region.

Abstract: A system for inserting a weft thread into a shed of an air jet weaving machine (1) includes a thread store (21) with a measuring apparatus (23.1, 23.2), a plurality of air nozzles (3, 4, 5.1a-c to 5.na-c) for the insertion of the weft thread (2) and a control system (10) which is connected to the measuring apparatus (23.1, 23.2) in order to be able to control the compressed air supply of the air nozzles (3, 4, 5.1a-c to 5.na-c) in dependence on measurement values of the measuring apparatus (23.1, 23.2). Switch on points (xj) are associated with the air nozzles (3, 4, 5.1a-c to 5.na-c), with the control system (10) charging one or more of the air nozzles (3, 4, 5.1a-c to 5.na-c) with compressed air as soon as a predictor value (xF) for the position of the weft thread tip, which is formed with the help of the measurement values, reaches the switch on point (xj) of the relevant air nozzle or air nozzles respectively.

Abstract: A weaving machine for the manufacture of leno cloths includes a leno apparatus with leno elements (5, 5′, 7, 7′, 8, 8′) for the forming of a shed (6) as well as additionally a cleaning apparatus with a plurality of nozzles (10.1, 10.2, 11, 13) for the removal of contaminations in the region of the leno apparatus and of the shed (6). Two of the nozzles (10.1, 10.2) are arranged above the shed, by means of which a compressed air flow (16.1-16.4) which is directed downwardly through the shed (6) from above is produced, and one of the nozzles (11) is arranged in the lower region of the leno elements, by means of which a compressed air flow (17) which is directed substantially horizontally towards the leno elements (5, 5′, 7, 7′, 8, 8′) is produced. In addition, a suction nozzle (13) by means of which a downwardly directed suction air flow (19) is produced is arranged beneath the shed.

Abstract: A method for the weft insertion in a jet weaving machine is proposed, in which in each work cycle a weft thread (S1) of predeterminable length which is to be inserted is drawn off from a winding drum (3) of a thread supply apparatus (2), the weft thread (S1) is inserted into an open shed (17) by means of a main nozzle (11) which is fed with a transport medium, is bound in into the cloth (G) through the change of shed, and is severed at the cloth edge which is near the main nozzle (11). In each work cycle the drawing off of the weft thread (S1) to be inserted is interrupted at least once in such a manner that at first a first predeterminable thread length is released for the drawing off from the winding drum (3) and then at least one further predeterminable thread length is also released for the drawing off from the winding drum (3).

Abstract: The weaving machine comprises a needle bar (3) and an insertion element (4) with which warp threads (13, 14) are guided and which are two components of a shed forming apparatus for the manufacture of leno cloths (1). The two components are moved vertically in a reciprocal manner. A horizontal displacement movement (40b) transverse to the direction of the warp threads is executed with the insertion element in addition to the vertical movement (40a). The movements of the two components cause a leno binding to arise in interplay with the insertion of a weft thread (12, 12′). The shed forming apparatus can be modified such that, on the one hand, the horizontal displacement movement (40b) of the insertion element is switched off and, on the other hand, for both components a stroke (h) of the vertical movement (30, 40a) is in each case increased and controlled in such a manner that a cloth without leno binding, in particular a simple cloth (1′), can be manufactured.

Abstract: The apparatus at a weaving machine (3) serves for the protection of persons in danger regions which extend about a beat-up edge (34) along a weaving width and beyond the latter. In this apparatus, monitoring means (1) which emit and register light beams (12) are arranged about the danger regions. Signals which arise as a result of an encroachment into the danger regions and through which an operating stop of the weaving machine can be triggered can be produced in the monitoring means by means of the light beams (12). First monitoring means (1) are associated with a more comprehensive region and second monitoring means (2) are associated with a central region, the actual danger region. During a normal operation of the weaving machine the first monitoring means are in an active state which ensures the protection. An activation of the second monitoring means is provided for use during activities which are occasionally to be carried out at the weaving machine within the more comprehensive region.

Abstract: A method for the operation of a thread supplying apparatus of a weaving machine. The method include transmitting information about a required weft thread to subsequent weft insertions. The information is transmitted after every complete weaving machine cycle to the thread supplying apparatus and at the same time. Thus, the information about the required weft thread of at least one of the two subsequent weft insertions has already previously been transmitted.

Abstract: An apparatus for severing a weft thread which is to be inserted into a shed comprises a clamping device with a stationary clamping part and a settable clamping part in order to hold back the weft thread and a severing device in order to sever the weft thread after release by the clamping device. The severing of different yarn types is ensured by means of a problem-free clamping of the weft thread in the thread clamp.

Abstract: The weaving machine with a weft monitoring insertion system (1) for a large number of different weft threads (11, 11', 11") comprises a weft insertion member (6, 60), thread brakes (3), a weft thread selector (4) for the serving of a thread (11, 11', 11") or of more than one thread at the same time, a thread monitor (51) for weft threads (11) which are correctly inserted, and an electronic and programmable control member (8) for the setting of the thread brakes. The weft threads (11), when correctly inserted, form incoming angles (.alpha.) at the thread monitor in the presence of a deflection which depend on the choice of the weft thread. Utilizing the thread monitor (51) a signal can be produced for the control member (8) which is dependent on the incoming angle and the thread tension. Control signals can be calculated and produced in the control member as a result of this signal and as a result of information on the current serving of the weft thread or of the weft threads, i.e.

Abstract: An apparatus for changing the beat-up positions of a reed in a weaving machine. The apparatus includes a drive, a drive member, a transmission and a kinematic chain. The kinematic chain is connected to the transmission and the pivot axle for the reed, with the pivot axle being pivotally mounted on the sley sword. A basic movement is imparted by the drive to the apparatus with the beat-up position of the pivot axle of the reed being changed by the drive member.

Abstract: A Jacquard weaving machine includes a weaving apparatus and a Jacquard apparatus, which are both connected to one another for the transmission of torque via a mechanical transmission device and are driven by a common motor. An additional drive device is provided which acts at least on the Jacquard apparatus. An angle sensor is provided for the measurement of an angle of rotation and/or a torque sensor is provided for the measurement of the torque present between the weaving machine and the Jacquard apparatus. The sensors are connected to a control device that controls the drive device in such a manner that peak values in the torque and/or fluctuations in the speed of rotation are reduced.