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 catching and holding apparatus for catching-side weft thread ends in a weaving machine comprises a main nozzle and a catching passage for holding and stretching a weft thread end and a carrier on which the main nozzle and the catching passage are arranged. Furthermore, the catching and holding apparatus also comprises an auxiliary nozzle and one or more guides, which are arranged on the carrier in such a manner that a weft thread end which is located in the active region of the auxiliary nozzle is brought by an air jet of the auxiliary nozzle along the guides into the active region of the main nozzle.

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: In accordance with the invention a method (1) for braking a weft thread (2) of a weaving machine (3), in particular of a jet weaving machine (3) is provided, in said method a braking element (4) is brought into contact with the weft thread (2) and the braking element (4) is moved via a control device (5) by means of a drive (6). In this arrangement, during a weft thread insertion (7) a first measurement value (8) of a movement parameter (9) of the weft thread (2) is determined, a first estimate value (10) for the movement parameter (9) is estimated on the basis of the first measurement value (8) and a correction value (11) is determined from it. The movement parameter (9) of the weft thread (2) is then corrected on the basis of the correction value (11).

Abstract: The invention relates to a method (1) for braking a weft thread (3) of a jet weaving machine (10), in said method (1) a braking element (2) being brought into contact with the weft thread (3), with the braking element (2) being moved by means of a drive (21) in accordance with a predeterminable distance/time plot so that the weft thread (3) is deflected by the braking element (2) in accordance with a position function (23), so that the weft thread (3) is braked in accordance with a braking profile (31), characterized in that the position function (23) is matched to the braking profile (31) of the weft thread (3).

Abstract: A method for monitoring the transport of a thread in a weaving machine is presented in which the thread includes thread sections (21, 21.i) which are transported with an associated speed (vi). In this method, values (24) of at least one kinematic measurement parameter of at least one thread section (21, 21.i) are measured and, based on the measured values (24), approximation values (25) of the tensile force which acts on at least one thread section (21, 21.i) are calculated by means of a computation model (2). The computed approximation values (25) are displayed for monitoring purposes.

Abstract: The method for weaving low flaw cloths (4) comprises an elimination of weft thread sections which have irregularities (22, 22?). The method is carried out by means of a weaving machine (1) which in the presence of an irregularity on a weft thread (2) to be woven can be controlled in such a manner that at least one weft thread section which comprises the irregularity can be removed from the cloth being formed after an insertion operation. The irregularity is in each case detected by a sensor (23a, 23b, 23c) prior to the feeding in of the weft thread into a thread store (21). After the detection of the irregularity an incorporation of the weft thread into the cloth is prevented in that a shed forming apparatus (100), for example a dobby for the moving of heald frames (10), is controlled in such a manner that that all warp threads (3) of the cloth to be formed are deflected either downwardly or upwardly into positions to the side of a weft thread insertion line (2?).

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: A method for monitoring the transport of a thread in a weaving machine is presented in which the thread includes thread sections (21, 21.i) which are transported with an associated speed (vi). In this method, values (24) of at least one kinematic measurement parameter of at least one thread section (21, 21.i) are measured and, based on the measure values (24), approximation values (25) of the tensile force which acts on at least one thread section (21, 21.i) are calculated by means of a computation model (2). The computed approximation value (25) are displayed for monitoring purposes.

Abstract: A weaving machine having an apparatus for tucking in one or more weft thread ends (2?a) and for forming a cloth edge (10) as well as a shed forming apparatus for forming a shed (14) with a shed apex (14a). The apparatus for tucking in one or more weft thread ends (2?a) includes an air tucker (4) which is arranged outside the cloth width (12) and at least one additional blowing nozzle (6) which is arranged within the cloth width (12), and the jet direction (6a) of which is oriented towards the shed apex (14a) in order to be able to blow the weft thread ends (2?a) into the shed apex.

Abstract: A jet weaving machine is proposed in which a weft thread (S) can be inserted by means of a fluid from a weft insertion side (2) to a receiving side (3), including a weaving sley (9), along which a weft insertion path (4) extends, which determines a weft insertion direction (A), and including a monitoring apparatus (20) which is arranged at the receiving side (3) and which comprises two sensor devices (21, 22) for detecting the weft thread (S) or parts of the weft thread respectively, with exactly one of the sensor devices (21) being firmly mounted on the weaving sley (9).

Abstract: The method for weaving low flaw cloths (4) comprises an elimination of weft thread sections which have irregularities (22, 22). The method is carried out by means of a weaving machine (1) which in the presence of an irregularity on a weft thread (2) to be woven can be controlled in such a manner that at least one weft thread section which comprises the irregularity can be removed from the cloth being formed after an insertion operation. The irregularity is in each case detected by a sensor (23a, 23b, 23c) prior to the feeding in of the weft thread into a thread store (21). After the detection of the irregularity an incorporation of the weft thread into the cloth is prevented in that a shed forming apparatus (100), for example a dobby for the moving of heald frames (10), is controlled in such a manner that that all warp threads (3) of the cloth to be formed are deflected either downwardly or upwardly into positions to the side of a weft thread insertion line (2′.

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: With the measuring device movements are determined on a weaving machine (1). With this measuring device (2) digital signals can be produced at discrete points in time occurring in a periodic sequence by means of a positional determination of one or more identifiable points (31) which are located on a moved surface (30) and within a two dimensional measuring window (3) of the measuring device. These signals can be evaluated for determining an interval which can be associated with changes in position of the identifiable positions. Optical and electronic components (21, 22, 23, 20) for effecting pattern recognition are integrated in the measuring device. The identifiable positions can be defined by the pattern recognition. The positions of at least some of these positions can be determined at two sequential points in time of the said sequence. The interval associated with the changes in position can be calculated at each of the discrete points in time.

Abstract: A sley apparatus for a weaving machine which has a sley profile (1), a reed (2) and a drive (3), with the sley profile (1) carrying the reed (2) and being in active connection with the drive (3). The sley profile (1) has at least two separate parts, namely a main profile part (4) and an auxiliary profile part (5), with the auxiliary profile part (5) being releasably connected directly or indirectly to the main profile part (4).

Abstract: In accordance with the invention a thread carrying apparatus is proposed with a thread (2) lying in contact with or passing along the thread carrying apparatus with friction in the operating state. The thread carrying apparatus includes excitation means (3) for producing oscillations which reduce the frictional force between the thread (2) and the thread carrying apparatus. In this arrangement a resonator body (4) is provided with the thread (2) lying in contact with or passing along the resonator body with friction in the operating state. The resonator body (4) is designed in such a manner that the excitation means (3) produce resonant structural sound oscillations in the resonator body (4).

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.