Abstract: A water injection apparatus for a water jet loom, includes a weft insertion nozzle for weft insertion of a weft yarn by injection water, a weft insertion pump pumping water into the weft insertion nozzle, a water storage tank storing water introduced into the weft insertion pump, and a suction pipe passing water from the water storage tank into the weft insertion pump. The water injection apparatus includes an auxiliary water supply unit that is provided separately from the weft insertion pump and can supply water to the suction pipe. At least when the weft insertion pump sucks water, the auxiliary water supply unit supplies water to the suction pipe.

Abstract: A gripper head for the insertion of weft threads on a gripper weaving machine as well as a gripper weaving machine with such a gripper head. The gripper head thread clamp for the weft thread is controlled in a contact-free manner and with high transfer reliability of the weft thread even in the machine center.

Abstract: A thread draw-off nozzle (1) for an open-end spinning device with a draw-off nozzle funnel (6) that contains a yarn deflection zone (3) for deflecting a yarn (5) produced during the yarn draw-off process. The draw-off nozzle funnel (6) has a two-part design, an external part (6a) containing a first area (3a) of the yarn deflection zone (3) and an internal part (6b) containing a second area (3b) of the yarn deflection zone (3). Both parts (6a, 6b) are made of different materials and/or have different coatings at least in the areas (3a, 3b) of the yarn deflection zone (3) or only one of the two parts (6a, 6b) has a coating.

Abstract: Method for introducing a weft thread in an air weaving machine, wherein the instant when the supply of compressed air to a set or sets of auxiliary blowers is interrupted is controlled based on measurements on the transported weft thread during transport of this weft thread.

Abstract: A method and a clamping device for clamping a weft thread in a jet weaving machine are proposed. The weft thread strand runs through the beginning section (2.1) and the end section (2.2) of a mixing tube. The two sections between themselves form an engagement opening (8) and are connected with a first holding magnet (11) by a counter support (9). An actuator (6) in the form of an elastomeric bellows, which comprises a chamber (10), is located on the beginning section (2.1) of the mixing tube. The chamber (10) is connected to a valve (16) via a supply line (20) and is acted on variably with compressed air. By deformation of the actuator (6), a clamping element (7) connected thereto carries out a tilting movement between the counter support (9) and a contact stop part (19), which contains a second holding magnet (12). The holding magnets (11, 12) lead to an exact and reliable clamping of the weft thread (3).

Abstract: An apparatus (1) for the insertion of weft threads in a weaving machine is presented. The apparatus includes a nozzle holder (9) and, secured thereto, at least one nozzle (3) with a mixing tube (6) for the insertion of a weft thread (2) as well as a clamping device (7) which can be charged with a medium in order to firmly clamp a weft thread which is introduced into the nozzle. In addition the apparatus (1) contains at least one control valve (8) which is arranged at or in the nozzle holder (9) or nozzle (3) in order to control the clamping device (7).

Abstract: A device for inserting of weft threads in an air jet weaving machine comprising at least one set of main nozzles (13, 14) which are mounted in series, and to which individual regulating valves (21, 22) are assigned, is provided with a control and regulating unit (17) which defines the individual settings of the regulating valves (21, 22) with respect to one another, in order to form an overall value for the intensity of the impulse transmission of the set of main nozzles with each regulating valve contributing a proportion of the overall impulse intensity.

Abstract: The present invention has an object of providing a method for producing a carbon fiber woven fabric in which the length of each warp yarn made of a carbon fiber strand is uniform, weft yarns are straightly arranged without waviness, and that is excellent in quality can be obtained with high productivity (production speed), and is characterized that a method for producing a carbon fiber woven fabric using an air jet loom in which heald in a shedding motion has an angle of repose in a range of 0 to 50° when weaving a uni-directional carbon fiber woven fabric woven with a carbon fiber strand having a fineness of 400 to 6,000 tex as the warp yarn and an auxiliary fiber having a fineness of ? or less of the carbon fiber strand as the weft yarn.

Abstract: A method for transporting the weft thread through the shed of an air-jet weaving machine having a nozzle fed with a flowing transportation medium, wherein the portion, changeable along the weft thread, of the natural thread charges arranged irregularly on the weft thread is contactlessly registered by means of an electrode array, wherein the changing total charge is determined on the electrode array, wherein the periodic change in the total charge is evaluated for determining the axial velocity of the weft thread, and wherein the nozzle of the weaving machine is controlled as a function of the axial velocity of the weft.

Abstract: A weaving machine starts-up in slow speed operation during a first weaving cycle following the machine start. To help avoid weft breaks, a method is provided to hold a weft thread inserted into the loom shed during the first weaving cycle. A sensor monitors the weft insertion. The inserted weft thread is held by binding threads at a location downstream from an inlet side of the loom shed, before the weft thread is bound by the warp threads. The binding of the weft thread by the binding threads is carried out dependent on a signal of the sensor.

Abstract: The weaving machine comprises a pneumatic weft insertion. It is fitted with a weaving reed (12), wherein a guiding device (42) is associated with a guiding channel (40) for a weft thread (10). The guiding channel (10) comprising the weaving reed (12) can be pivoted between an insertion position and a stop position for the weft thread (10). Also, a fixed weft thread insertion device (8), which comprises at least two blast nozzles (22), is associated with the guiding channel (40) in the insertion position. A fixed blade (46) is used to cut the inserted weft thread (10). The blast nozzles (22) are pivotably mounted in the transversal direction (Q) counter to the blade (46) in order to improve the weaving machine and are connected by means of a motor drive device (28) in order to displace the blast nozzles (22) counter to the blade (46).

Abstract: The invention relates to a coated woven fabric or knit fabric for a safety air bag and to the production method thereof. More specifically, the invention relates to a coated woven fabric or knit fabric for a safety air bag, which is obtained using a method that does not involve a sizing step or a washing step and which is produced from threads having a pre-determined amount of a lubricant composition on the surface thereof. The invention also relates to the use of the aforementioned threads in the area involving the production of coated woven or knit fabrics for safety air bags, as well as to a safety air bag comprising said coated woven or knit fabric.

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 clamping device is provided for a jet weaving machine that has a main discharge nozzle (1) with a mixing tube (2) for inserting a weft thread (3) into a shed with a conveying fluid discharged from the main discharge nozzle. This clamping device is placed inside the mixing tube (2) in the area from which the weft thread exits, and has an actuator, which is situated outside of the mixing tube (2), and a lever connected to the actuator so that this lever is actuated by the actuator (6) to execute a tilting or pivoting motion whereby the weft thread is clamped between the lever and an abutment (9) in an opening of the mixing tube.

Abstract: A method for holding an inserted weft thread in an air jet weaving machine is presented which is provided with a reed (8). In this method the weft thread is inserted into the air jet weaving machine, is deflected by means of a nozzle (3) out of the weft insertion direction (9) and is blown into a receiving opening (5a) of the catching channel (5) and held in the same. The position of the nozzle (3) and of the catching channel (5) is for this purpose matched to the desired cloth width within the width of the reed. In the named method the nozzle (3) and the catching channel passage (5) are arranged at the beat up side of the reed (8).

Abstract: Glass cloth which is formed of a warp yarn and a weft yarn of the same glass yarn, wherein a ratio of warp yarn width to weft yarn width is not less than and not more than 1.20 and a ratio of an elongation rate in a length direction when a load in a range of 25 N to 100 N per 25 mm width of the glass cloth is added in a warp yarn direction, to an elongation rate in a width direction when said load is added in a weft yarn direction is not less than 0.80 and not more than 1.20.

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: Blowing nozzle for supporting a weft thread in a weaving machine, provided with a flow-through canalisation (17) for a fluid tracing a bend (20) near the free end of the blowing nozzle (3) to subsequently flow into the environment via at least one outlet opening (18), wherein a jet pipe (21) is formed in this flow-through canalisation (17), and the jet pipe (21) is integrated in the bend (20).

Abstract: A thread clamp for a weaving machine includes a clamp having at least two clamping parts between which a thread may be clamped and an actuator arranged to move the clamping parts between clamping and unclamped positions. The actuator is arranged to operate the clamp so that it moves at least in one direction by a negative fluid pressure. The actuator may be formed as a small piston that may be actuated both by positive pressure and negative pressure to move the clamp between clamping and unclamped positions.

Abstract: The method of disposing the weft, in a loom for displacing the weft led into a weft insert nozzle by jetting the air current from a guide nozzle disposed in a reed sley and releasing the weft from the upstream side of the weft inset nozzle to the vicinity of an intake of an discharge device, is characterized in that, when displacing the weft to the vicinity of the intake, the reed sley is stopped at a position where the air current from the guide nozzle is directed to the vicinity of the intake.

Abstract: A loom for weaving three dimensional woven structures which include interwoven bias fibers and at least one integrally woven junction. The loom includes bias fiber holders, bias shuttles, and independently controllable bias arms to interweave the bias fibers. Each bias fiber holder holds a bias fiber under tension. The bias shuttles may releasably grip a number of the bias fiber holders and translate them horizontally between a plurality of predetermined horizontal positions. Each bias shuttle is at a separate vertical position. At least one bias shuttle translates above the shed and at least one bias shuttle translates below the shed. Each independently controllable bias arm may releasably grip one of the bias fiber holders and translate it vertically, at one of the predetermined horizontal positions, with a range of motion extending at least between two of the bias shuttles.

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: The shed of a fluidic weaving loom is not changed simultaneously for all warp threads, but rather continuously starting at the weft entrance and continuing helically, so to speak, to the exit of the warp shed. This sequential shed closure takes place with a so-called domino effect along a helical line curved in space, whereby additional time is gained for stretching the inserted weft thread and temporarily stopping the shed formation or shedding is avoided.

Abstract: After a picking action of a weaving machine, a cloth-end warp maintains its shed over a plurality of weaving cycles including a weaving cycle in which weft ends are tucked in. Air is jetted toward a shed formed by warps in a widthwise direction of weaving from outside the cloth after the weaving cycle in which the weft ends are tucked in, and at latest before the cloth-end warp unsheds. The air jet energizes the weft ends, tucked in, inside the cloth in the widthwise direction of weaving.

Abstract: A method for controlling weft insertion in an air jet type loom, includes setting an upper limit and a lower limit with respect to the running property of a weft yarn to be inserted through a shed of warp yarns by way of a main nozzle and a plurality of groups of sub nozzles arrayed in the running direction of the weft yarn, and causing air jet end timings of the respective groups of sub nozzles to become later when the running property of a weft yarn is lower than the lower limit, and air jet start timings of the respective groups of sub nozzles to become sooner when the running property of a weft yarn is higher than the upper limit. This method enables stable weaving of high-quality fabric while minimizing air consumption by properly regulating both the air jet start timing and the air jet end timing of sub nozzles of the air jet type loom, considering variation in the running property of a weft yarn.

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 shed of a fluidic weaving loom is not changed simultaneously for all warp threads, but rather continuously starting at the weft entrance and continuing helically, so to speak, to the exit of the warp shed. This sequential shed closure takes place with a so-called domino effect along a helical line curved in space, whereby additional time is gained for stretching the inserted weft thread and temporarily stopping the shed formation or shedding is avoided.

Abstract: A filling-tautening device has a filling-tautening member provided with openings, such as round, through holes, vertical slots or meshed holes. Part of a picking fluid passes through the openings and hence the reflection of the picking fluid by the filling-tautening member is reduced accordingly to prevent a picked filling thread from twining round the filling-tautening member.

Abstract: A fill yarn holding apparatus for use on an air jet loom of the type used for weaving certain fabric patterns where each pattern has at least two fill yarns introduced between each harness reciprocation, and including a pivotal sley shaft, a reed mounted on the sley shaft, at least one air jet for propelling fill yarns across the length of the reed, after which the reed beats the successive fill yarns against the fell line of the fabric being woven, and the harnesses cross to lock in the weave pattern.

Abstract: A weft inserting control device for fluid jet type loom for detecting dispersion of a weft reaching angle to control the reaching angle of weft yarn is provided, including a weft insertion detecting unit for detecting dispersion of a weft reaching angle in a plurality of control cycles such as a plurality of picking numbers, for example; and a comparing unit for comparing a plurality of detection values of the weft reaching angle given by the weft insertion detecting unit with a plurality of respectively different reference value are provided. The weft inserting control device for fluid jet type loom also includes a controlling unit for controlling the weft reaching angle on the basis of a result of the comparison in every control cycle, the result being obtained by the comparing unit is also provided. The reference value is set so as to have a minus correlation with the length of the control cycle.

Abstract: A weft inserting control device for fluid jet type loom is provided, including a weft insertion detecting unit for detecting dispersion of the weft reaching angle in a predetermined control cycle; a first comparing unit for comparing a detection value of the weft reaching angle given by the weft insertion detecting unit with a reference value showing an allowable range of the dispersion; and a second comparing unit for comparing the detection value with a threshold value showing a threshold in controlling the dispersion. The weft inserting control device also includes a controlling unit for controlling the weft reaching angle on the basis of the detection value and a result of the comparison carried out by the first comparing unit. The controlling unit controls the weft reaching angle by reducing a predetermined amount of the detection value and by using the threshold value as the detection value, for example, when the second comparing unit reveals the detection value to be over the threshold value.

Abstract: Method for weaving fabrics with a rib structure, whereby on a weaving machine, two fabrics (22), (23); (49), (50) are woven one above the other with a rib structure according to a face-to-face weaving method, whereby each fabric comprises a backing fabric with rib warp yarns (15), (16), (17), (18); (43), (44), (45), (46) which are alternately woven in the backing fabric and are rib-formingly passed around over at least one weft yarn (4), (5), (32), (33) whereby pile warp yarns (19), (20); (47); are alternately interlaced in the top (21); (49) and the bottom fabric (22); (50) around at least one weft yarn (1), (2), (3), (6); (31), (36), and whereby these pile warp yarns (19), (20); (47) are split between the two fabrics so that two fabrics (22), (23); (49), (50) with a rib structure are obtained which also comprise at least one area with upright pile yarns.

Abstract: A valve arrangement of a loom includes valve modules held between flange plates and sharing a common inlet feeding into a common inner valve space. A valve outlet of each valve module leads to an insertion nozzle or nozzle group, and is controlled by a valve disk actuated by a piezoelectric actuator to rapidly dynamically adjust the pressure profile. A quality parameter, characteristic of the thread insertion flight time of each weft thread, is stored in a data bank and has a nominal pressure profile for achieving a nominal thread flight time allocated thereto. The actual thread flight time of each weft thread is measured and compared with the stored nominal thread flight time. A control signal responsive to the time difference is provided to the valve arrangement to control the piezoelectric actuator so as to adjust the pressure and/or the quantity of the pressure medium provided through the valve module to the connected insertion nozzle.

Abstract: A method is provided for weaving a false boucle fabric with a rib structure on weaving machines in successive weft insertion cycles. In each cycle a top (1), (2), (3) and a bottom weft thread (4), (5), (6) are inserted between binding warp threads (9-12) and pattern warp threads (13-16) of a series of warp thread systems so that a fabric is woven. Top (1-3) and bottom weft threads (4-6) are inwoven by a respective set of binding warp threads (9, 10), (11, 12), thereby weaving two backing fabrics. Respective pattern warp threads (13), (14); (15), (16) are interlaced in a respective backing fabric and are rib-formingly passed around over a top (2), (3) or bottom weft thread (5), (6) running between the backing fabrics which is not inwoven by binding warp threads (9-12), so that two fabrics (17), (18) with a rib structure are woven one above the other.

Abstract: A method and apparatus to monitor filling insertion in a weaving machine. A filling (3, 4) is severed during insertion by a filling-scissors (15), and the actual time at which the filling (3, 4) is severed is detected.

Abstract: A fluid jet loom includes a source of pressurized fluid, a magnetic valve, and at least one nozzle, such as a weft insertion air jet nozzle, as well as at least one flexible pressure hose connecting and providing pressurized fluid from the magnetic valve to the nozzle. In order to detect any hole, rupture or separation of the pressure hose, the hose includes at least one electrical conductor embedded in or arranged on the hose wall. An electrical current flows through the electrical conductor, which preferably forms a conductor loop and especially a resonant circuit loop. By monitoring an electrical characteristic, such as the resonant frequency, of the electrical signal received from the conductor loop, any disruption in the pressure hose can be immediately detected as a change in the monitored electrical characteristic, which in turn causes a loom stop signal to be generated.

Abstract: A method for manufacturing fabrics with a rib structure, in particular false bouclé fabrics is provided. On a weaving machine two series of warp threads (4, 5, 6, 10, 11); (7, 8, 9, 12, 13) are provided for weaving a respective fabric (21); (22). In successive insertion cycles, in each case, at least three weft threads (1), (2), (3) are inserted one above the other between the warp threads, so that in each case a set of weft threads (3), (2); (1), (2) running one above the other are inwoven by the warp threads (5), (6); (8), (9) of one of the other two series, and at least one weft thread (3); (1) is inwoven by the warp threads (8), (9); (5), (6) of the other series, so that two fabrics (20), (21) with a rib structure are woven simultaneously. A method for manufacturing loop pile fabrics is provided.

Abstract: A method for weaving fabrics with a two-sided rib structure, such as false boucl{acute over (e)} fabrics, comprises forming a fabric on a weaving machine from weft threads and warp threads of a series of warp thread systems, with sets of at least two weft threads running one above the other. Each warp thread system comprises at least three pattern warp threads of which two opposite each other, respectively along the upper side and the lower side of the fabric, form a number of ribs. The pattern warp threads are alternately rib-formingly passed around over one or several sets of weft threads and are interlaced in the fabric, while each additional pattern warp thread is inwoven in the fabric between weft threads of the sets over which other pattern warp threads are rib-formingly passed around.