Abstract: The present invention discloses a wear-resistant weaving fabric and manufacturing method thereof. The manufacturing method is to utilize a jacquard to interweave a plurality of warps delivered by two warp beams with a plurality of wefts delivered by a weft supplied mechanism to produce a weaving fabric with space impression. Furthermore, the implementation of a reinforcing procedure to the warps and the wefts before interweaving in the present invention can further enhance the wear resistance of the present weaving fabric.

Abstract: A method for weaving a fabric having: a backing fabric (100, 200) formed by backing warp yarns, having binding warp yarns (101, 201) and first and second weft yarns (3, 4); one or several tension warp yarns (102, 202, 103, 203); and non-pattern forming and/or pattern forming pile warp yarns (7, 6), the pattern forming pile warp yarns (6) form pattern forming pile burls (6a), and each pattern forming pile burl (6a) is interlaced round at least one third weft yarn (5) situated at the back of the fabric (1, 2) with respect tote tension warp yarns (102, 202, 103, 203).

Abstract: The present invention relates to a method for face-to-face weaving of a pile fabric on a weaving machine, pile forming pile warp yarns (6, 7, 8, 9, 16, 17, 18, 19) being interlaced alternately around a weft yarn (1) in the upper fabric and around a weft yarn (1) in the lower fabric and non pile forming pile warp yarns (6, 7, 8, 9, 16, 17, 18, 19) being interlaced in one of the backing fabrics in accordance with a predetermined pattern, the said weaving machine comprising at least three weft insertion means and that at each weft insertion cycle only one weft yarn is inserted, the non pile forming pile warp yarns (6, 7, 8, 9, 16, 17, 18, 19) to be interlaced are positioned on a different level (N1, N2) and, in successive series of four weft insertion cycles (a, b, c, d) each time during two successive weft insertion cycles one weft yarn (1) being inserted (a, b) under the two levels (N1, N2) and one weft yarn (1) being inserted above the two levels (N1, N2) and each time, during two other successive weft insert

Abstract: A power weaving loom includes weft thread insertion and collecting bands (6, 7). Drive units drive the bands and cause leading parts of the bands to move towards and away from one another between sides of the weaving machine and an approximately half-width position (13) of the machine. The bands include grippers (6b, 7b), which allow the weft thread to be drawn from a first side of the machine to the approximately half-width position and then to a second side of the machine. The drive units include servomotors which are coordinated to act upon the bands via motion-transmitting members with a torque that allows inward and return motions of the bands during brief shedding times, thus providing high machine picking speeds even in machines of great width.

Abstract: A thread section of a weft thread is held precisely ready for a receiving rapier in a feed rapier on a rapier loom despite the effects of retarding forces. Deflections of the thread section by the head of a receiving gripper are compensated for, whereby the feed rapier is provided with a thread clamp on the side facing the feed device for the weft thread, which releases on tension forces occurring in the thread section and permits a deflection of the thread section.

Abstract: A stop element (24) is used to open a gripper clamp (20) of a weaving machine (3) and is associated to the gripper clamp's stop piece (21) and the stop element during the slow mode operation of the weaving machine is transversely moved into the path of the gripper clamp's stop piece (21) after the clamp already has moved into the vicinity of the stop element (24).

Abstract: A device for driving and guiding a rapier of a weaving machine, comprises a rotatable drive wheel (1) provided for driving a rapier rod (14) in a back and forth movement and a guide channel formed by adjustable guide bodies (10), (11) in order to guide the said rapier rod (14) according to a guide path in co-operation with the drive wheel (1). The guide bodies (10), (11) are part of a guide unit (9) which, as a whole, is adjustable in order to modify the distance between the guide path and the rotation shaft (2) of the drive wheel (1), and where the drive wheel (1) is continuously adjustable in the longitudinal direction of its shaft (2). With this device the clearances of the rapier rod with respect to the drive wheel can be performed easily, rapidly and with great precision, so that this device is able to work with a minimum development of heat and wear.

Abstract: Thread clamping arrangement for a carrier gripper of a rapier loom wherein the arrangement includes a rigid support coupled to a lateral wall of a body of the carrier gripper. Each of an elongated first clamping element and an elongated second clamping element are provided. A clamping gap is formed by the first and second clamping elements. A magnet is included that exerts an attracting force on each of the first and second clamping elements.

Abstract: A controllable output brake for a thread feed device includes actuating elements that are connected to a control member and are used for effecting a controlled displacement of a thread brake element. The controlled displacement is an axial play with which a supporting ring for the thread brake element is supported in a holding member. The controlled displacement is used for controlling the tension of a thread. In the case of such a thread feed device, a push drive connected to the holding member is provided for each direction of movement in which the thread brake element is adjusted. The push drive for at least one direction of movement is a pneumatic push drive connected to a pneumatic drive control unit. In a projectile weaving machine, the controlled output brake is disengaged and re-engaged approximately in synchronism with a controlled thread brake which is provided as well. The engagement is preferably carried out in advance of the engagement of the controlled thread brake.

Abstract: A method for mechanically producing a seam half or a seam for making a length of woven fabric endless is characterized by the length of woven fabric being formed of warp threads extending longitudinally to the direction of the length of woven fabric as well as of weft threads extending transversely to the direction, wherein the warp threads are released from the woven material in an end portion or in both end portions of the length of woven fabric and woven as auxiliary weft threads into auxiliary warp threads in accordance with a weaving order predetermined for producing the seam half or the seam. In the end portion or in one of the two end portions, a group of weft threads, which borders on the non-opened length of woven fabric in the direction of the length of woven fabric and which has been exposed by releasing the warp thread ends from the woven material, is used as auxiliary warp threads.

Abstract: A weft clamp (8) of a gripper head in a shuttleless loom is operated by a finger (10) driven by a coupling rod (13) which in turn is activated by a cam drive (18; 30, 31). The finger is mounted to the upper end of the coupling rod which is guided by a rocker arm (24) that follows the reed or sley motion. The lower end of the coupling rod is directly coupled through a cam follower roller (17) to the cam drive (18; 30, 31), either by one or more springs that assure a continuous engagement of the cam follower roller with the cam or by a bellcrank lever that engages a double cam with two rollers, one at each end of the two bellcrank arms. In both instances only one pivot or journal is needed in the transmission link for the actuating force for operating the clamp operating finger (10) in synchronism with the sley oscillating movement and in synchronism with the gripper movement.

Abstract: A gripper loom includes guides mounted laterally outside the shed and guides displaceable into and out of said shed. Both guides engage guide surfaces of a rapier to guide the rapier, but the set of guide surfaces engaged by the guides mounted laterally outside the shed and the set of guide surfaces engaged by the guides displaceable into and out of the shed are located at different sites on the rapier.

Abstract: A gripper head travelling through a shed in a weaving loom, has a longitudinal lateral guide surface (14A, 17A) along its gripper head body which is temporarily contacted by guide lever fingers in those positions of the head where its proper guidance is most critical, e.g. at the time of the weft transfer. The guide lever fingers are so driven by a drive mechanism that these fingers are withdrawn from the loom shed just as soon as the weft transfer is completed.

Abstract: Weft yarn faults encountered during the operation of rapier looms are corrected by correlating the detection of the fault to the angular position of the rotating main shaft of the loom. The loom has a shed with a giver side and a taker side, a giver rapier at the giver side and a taker rapier at the taker side. Position signals are stored in an electronic storage device for weft yarn faults which can occur at predetermined angular positions of the main shaft during operation of the loom. The weft yarn is monitored and a signal is generated when a faulty weft yarn is detected. This signal is compared with the position signals in a logic circuit to thereby determine the nature of the fault. After the nature of the fault has been determined, the faulty weft yarn is appropriately removed and, thereafter, weaving continues.

Abstract: A rapier loom has a picking mechanism in which one rapier (a giver rapier) transfers a weft yarn to another rapier (a taker rapier) in mid-shed. Each rapier is oscillated toward and away from one another by a drive and includes a yarn clamp which is actuated by a clamp opener to provide reliable yarn transfer from one rapier to the other. The rapier drives and/or clamp openers are driven by programmed servomotors. In this way, the velocities of the rapiers and/or the interval in which the clamp openers are opened can be adjusted according to the properties of the particular weft yarns used to ensure reliable transfer without damaging the yarn.

Abstract: Gripper guide for double-gripper weaving machines, comprising two bearing arms (5) and (5') running above one another and adjustable individually in the warp direction. An L-shaped guide strip (7), (7') is fixed to each bearing arm (5), (5') so that it is adjustable in height. In front of each guide strip (7), (7') there is a straight guide strip (8), (8') which forms a U-shaped channel for the gripper bars (4), (4') together with each of the first mentioned guide strip (7), (7'), so that the gripper bars do not swing. The straight guide strips (8), (8') are adjustable both in the warp direction and in height and are easily and quickly removable from their guide position, for example, through a hinged connection to the respective bearing arms (5), (5'), which permits the upper guide strip (8) to flap up and the lower guide strip to flap down.

Abstract: A shuttleless loom has a pair of inserters each having a head provided with a respective weft-yarn gripper and movable from respective sides of a warp therethrough to an advanced position in a central warp region with a weft yarn held in the gripper of a one of the inserters and a mechanism effective on the grippers in the central region to open the gripper of the one inserter and thereby transfer the yarn held thereby to the gripper of the other inserter so that the other inserter can pull the weft yarn the rest of the way through the warp. A support and guide system for the inserters has respective guide and support elements in the central region for the inserters laterally and longitudinally engaging same and forming at least one support surface positioned underneath the head of the respective inserter, and respective deflectors on the elements for spreading the warp at the support surfaces so that the warp does not come between the heads and the respective support surfaces.

Abstract: A weft filament is inserted in a loom by a mechanical shuttle from a feed side as a pick in a weft direction into a shed formed between groups of warp filaments extending and generally traveling in a warp direction. A deweaving system has a loosening nozzle for directing a jet of air against the defective pick in the warp direction for loosening the defective pick from the warp and at least one stripper nozzle situated between the groups of warp filaments for blowing the separated-out defective pick out of the warp against the weft direction to the feed side. A sensor is provided on the feed side for monitoring the pressure of the defective pick outside the shed on the feed side and a controller is connected to the stripping and loosener for, on detection of a defective pick, sequentially operating the loosening and stripper and then restarting the loom.

Abstract: A gripper loom is equipped along its reed or slay beam with a plurality of compartments formed by separation walls extending in parallel to each other and in parallel to the lower shed forming warp threads which pass through these compartments. The upper edges of the separation walls are aligned with each other and with a guide surface of the gripper rods so that the upper edges form extension guide surfaces for the gripper rods. Thus, the lower shed forming warp threads do not interfere with the proper motion of the gripper rods.

Abstract: A weft thread inserting gripper for a loom is equipped with a guide element attached to a side wall of the gripper. In order to enable the guide element to properly contact the reed when the gripper moves in the loom shed, the guide element and gripper combination is so constructed that at least the guide element can tilt about a journal axis extending in parallel to the direction of gripper movement. This tilting ability can be achieved by mounting the guide element itself to a gripper side wall for pivoting about the journal axis. The same tilting effect can be achieved by mounting the entire gripper side wall carrying the guide element on such a journal axis. Both possibilities assure an optimal surface contact between the guide element and the respective surface in the loom to provide a quiet and smooth gripper motion.

Abstract: A filling thread feeding device (2) comprises a thread guide (4) for placing at least one filling thread (S.sub.1) into the entrainment region of a gripper (6) which can be extended into and retracted out of a shed (8). A pair of scissors (22) open against a weaving reed (14) is incorporated at the insertion side externally of the fabric edge (20) in the region of a looping edge (16). The scissors serve for cutting off a previously inserted filling thread (S.sub.1, S.sub.2, S.sub.3, S.sub.4) during renewed insertion into the shed (8). The scissors (22) are designed and arranged in order to improve the operational security and achieve a simpler construction of the gripper loom. The scissors are, on the one hand, closed during the looping motion of the weaving reed and, on the other hand, an inserted filling thread (S.sub.1) can be conducted above and past the upper scissor blade (24) into a catching hook (32) lying in front (FIG. 2 ).

Abstract: The weft thread is inserted into a loom shed by a gripper seizing the thread end with clamping jaws. The thread end is presented to the jaws by a suction effect when the jaws are at a standstill or just starting to move toward the loom shed. The suction effect cooperates with a thread pull-back member and, if desired, with an auxiliary thread clamp for shortening the length of thread protruding from the jaws to reduce waste. The suction effect is applied by a suction pipe having a suction slot extending across the suction pipe in the direction of the weft thread between a cut-off point and a thread presenting eyelet. The suction slot merges into a suction channel leading the free thread end into the clamping jaws and for continuously holding the thread end between cut-off and renewed seizing of the thread end by the gripper clamping jaws for a gentle handling of the weft thread.

Abstract: A shuttleless loom is equipped with a displacement device for the control member or rail of the clamping device of the gripper, whereby the control rail can be displaced in parallel to the thread inserting motion of the gripper. This displacement of the control rail permits the proper presentation and transfer of the weft threads into the clamping device of the gripper even if the weft thread fan contains a substantial number of weft threads. This control rail displacement in the direction of the thread insertion into the loom shed takes place at each picking or inserting movement of the gripper and is substantially synchronous with the gripper motion after a thread transfer. When the number of threads in the thread fan is relatively small, the displacement device can be switched off.

Abstract: A shuttleless weaving machine employs filling-yarn transfer at the center of a shed from a first gripper system advanced from one side to a second gripper system approaching from the other side. The yarn transfer is implemented by opening and subsequently closing the clamping means of the gripper systems by means of control levers which are made to enter from the outside through the warp threads into the shed. The control levers are mounted at fixed locations and are so shaped and can be so pivoted from an operational position within the shed into a rest position below the shed that, when the reed beats up, the reed stay can pass unhindered over the control levers.

Abstract: A shuttleless weaving machine employs filling-yarn transfer at the center of a shed from a first gripper system advanced from one side to a second gripper system approaching from the other side. The yarn transfer is implemented by opening and subsequently closing the clamping means of the gripper systems by means of control levers which are made to enter from the outside through the warp threads into the shed. The control levers are mounted at fixed locations and are so shaped and can be so pivoted from an operational position within the shed into a rest position below the shed that, when the reed beats up, the reed stay can pass unhindered over the control lever. A common shaft carries both the control levers and cam means for actuating the control levers. Actuating means transmitting actuating motion from the cam means to the control levers are mounted on pivot means arranged in spaced parallel relationship to the common shaft.

Abstract: In a shuttleless weaving machine wherein the filling yarn is inserted from both sides of the shed by means of gripper systems provided with filling yarn clamping devices and advanced into and then retracted from the shed. The filling yarn is transferred from one gripper system to the other by a controlled opening and closing of the clamping devices. For this purpose, a guide rod mounted in a straight guide on the reed stay and displaceable toward the shed is provided, which is equipped at its end with a control finger. The control finger passes through the warp yarns of the shed and actuates the clamping device in the shed. The control motion is transmitted through a cam follower roller mounted on a rocker lever hinged to a coupling link which in turn is pivoted or hinged to the guide rod. The control finger is entirely pulled downwardly out of the shed for the reed beat-up. The masses which must be accelerated together with the reed are low and control finger vibrations are eliminated.

Abstract: In a shuttleless weaving machine wherein the filling yarn is inserted into the shed from both sides by gripper systems provided with clamping devices and advanced into and then retracted from the shed, the filling yarn is transferred by a controlled opening and closing of the clamping devices from one gripper system to the other. An articulated link drive including a second rocker arm pivotally supported at a fixed point in the machine is provided for this purpose. The articulated link drive is driven by a cam and cam follower on a first rocker arm connected to the link drive by a coupling link. One link of the articulated link drive has an extension which controls the clamping devices in the shed. The dimensions of the articulated link drive are such that the coupling curve described by the control extension during the time of the reed beat-up leads to a non-interfering rest position underneath the path of the batten or sley.

Abstract: The invention relates to a shuttleless weaving machine with filling-yarn transfer at the center of a shed from a first gripper system advanced from one side to a second gripper system approaching from the other side. The yarn transfer is implemented by opening and subsequently closing the clamping means of the gripper systems by means of control levers which are made to enter from the outside through the warp threads into the shed. The control levers themselves are mounted at fixed locations and are so shaped and can be so pivoted form an operational position within the shed into a rest position below the shed that, when the read beats up, the reed stay can pass unhindered over the control lever.

Abstract: This invention relates to an improvement in a device for the actuation of clamping means for filling yarn in a shuttleless weaving machine with filling yarn insertion by means of gripper systems advanced from both sides into the shed and then retracted and having clamping means for the filling yarn, said gripper systems actuating the clamping means in constrained manner through the intermediary of a control lever mounted on an arm secured to the sley shaft, pivotal therewith, and passing from the outside through the warp of the shed, the control lever being actuated by a cam, a swing lever with roller adapted to engage the cam, and a connecting rod connected to the swing lever and the control lever, the improvement comprising means pivotally mounting the swing lever on the weaving machine outside of the sley shaft.

Abstract: A pair of grippers for shutterless looms, of the type wherein a first gripper (carrying) grasps the weft thread at one side of the loom and carries it to the center of the warp shed, while the second gripper (drawing) receives the weft thread at the center of the warp shed from the carrying gripper, and transports it to the opposite side of the loom, where it releases the same. The weft thread grasping and holding members are mounted on head parts of the grippers disposed on opposite sides of a sliding plane. Along said sliding plane said head parts move side by side, cooperating between them for grasping and releasing the weft thread.

Abstract: Magnet means are illustrated carried along the raceboard of a shuttless loom extending within as well as outside the warpshed for exerting a stabilizing force until the opposed rapiers have reached a position outside the warpshed on a return stroke.

Abstract: A gripper weaving machine having flexible weft inserting or picking bands formed from plastics material reinforced with carbon fibers.

Abstract: Drive mechanism for a rapier-type loom, including a timing belt to which the rapiers are attached and an operating means, including a dwell device, for reciprocating the belt.

Abstract: A weft-laying needle for a shuttle-less loom has a U-shaped cross section with a relatively thick web and a pair of thinner shanks. The needle is composed of a body of synthetic-resin impregnated carbon fibers in which a woven glass fiber layer is inlaid below the outer surface and inwardly of the inner surface over the shanks and web at uniform distances from these surfaces.

Abstract: A method and means for inserting the weft threads in a shuttleless weaving machine which are particularly advantageous.

Abstract: A loom is provided with a longitudinal sliding surface over the entire length of travel of the outer extremity of the needles and behind these latter; the coupling system which connects the driving member to the outer extremity of the needles comprises a shoe which slides over that face of the longitudinal surface which is directed towards the needles; an oscillating arm which drives the needles is urged elastically so as to apply the shoe against the longitudinal sliding surface.

Abstract: A rapier of a weft inserting mechanism in a vertical weaving machine has an associated guide for engaging a cooperating rapier to prevent substantial divergence of the rapiers when they come together so as to facilitate transfer of the weft yarn from one rapier to the other during weft yarn insertion.

Abstract: A textile machine incorporates a crank and a connecting rod which carries a mass of such value and so positioned that the moment of inertia of the connecting rod about the axis of the crank pin introduces inertial variations which are opposed to and of absolute values at least equal to the inertial variations due to the combined sley and weft inserter mechanisms as well as their controls. The invention is especially applicable to the regularization of the running of looms with stiff weft inserters.

Abstract: A shuttleless loom having warp shed forming means and rapier type weft inserting means is provided with lay means which is pivotally mounted for oscillatory beat-up movement on a rotatable shaft, rotation of the shaft being synchronized with beat-up movement of the lay means by lay coupling means and the weft inserting means being interconnected with the shaft by weft inserting coupling means so as to insure a compact structure which is mechanically sturdy and which is timed in such a way as to afford rapid rapier insertion and withdrawal movement together with adequate dwell time for the weft insertion elements and shed forming means during beat-up operations of the lay means.

Abstract: A rapier loom has rapier heads which are moved by picking tapes into an open shed. Spacing elements are provided for the rapiers to ensure that when the shed is fully opened, a space is present between the tape and the bottom shed to reduce frictional contact between the warp yarns and the picking tape edges when the shed closes. The spacing elements can be in the form of slidable members which are disposed on the underside of the rapier head and/or in the form on spacing teeth which are secured to the sley and which can enter the shed between the warp yarns of a bottom shed.