Abstract: A face-to-face weaving machine with a weft insertion device (1), (2) is provided in order according to a top and a bottom insertion path to insert weft threads between warp threads (3-12). A lifting device (18, 19) works together with shed-forming devices (14), (15), (16), (17), of which first shed-forming device (14) is provided in order to bring warp threads (5), (6) above and between the insertion paths; second shed-forming device (15) is provided in order to bring warp threads (3), (4) between and below the insertion paths; third shed-forming device (16), (17) is provided in order to bring warp threads (7-12) above, between and below the insertion paths, such that the ratio (H/h) between, on the one hand the intermediate distance (H1), (H2) between two warp thread positions and on the other hand the lifting height (h) applied by the lifting device, is greater, preferably 1.5 times greater, for the third shed-forming device (16), (17) than for the first (14) and the second shed-forming device (15).

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.

Abstract: A gripper rapier provision for weaving machines with a fixed gripper rapier body has a hook and a gripping face on the inside of the hook. A hinged clip suspended from the fixed gripper rapier body, with a gripping face thereon, works together with the gripping face of the hook to grip a weft thread taken by the gripper rapier provision. A mechanism is provided in front of the extremity of the gap, formed by the gripping face of the hinged clip and the gripping face of the hook, for preventing the weft thread from sliding to the extremity of the gap. It consists of a bar provided on the gripping face of the hook of the gripper rapier body working together with a hole in the hinged clip, or a bar running through the extremity of the hook of the gripper rapier body working together with a hole in the hook of the gripper rapier body, or a bar provided on the hinged clip working together with a hole in the hook of the gripper rapier body.

Abstract: A method for manufacturing a pile fabric whereby a backing fabric (9), (10) is woven, in which groups of at least three weft threads (1-4), (5-8) are inwoven into respective openings between binding warp threads (11), (12); (13), (14) crossing each other, and in which non-pile-forming (parts of) pile warp threads (15-19) and tension warp threads (20), (21) are woven in, while pile warp threads (15), (16), (19) are allowed to form pile loops around weft threads, and whereby of each group of weft threads a first (1), (3); (5), (7) and a second weft thread (2); (6) are provided respectively along the pile side and along the back of the tension warp threads (20); (21) and the non-pile-forming (parts of) pile warp threads (15-19), and a third weft thread (4); (8) is provided between on the one hand the tension warp threads (20); (21) and on the other hand the non-pile-forming (parts of) pile warp threads (15-19).

Abstract: Method for manufacturing a pile fabric with pile loops formed by coarse pile threads (10-15), such as an Axminster carpet, on a face-to-face weaving machine with which weft threads (1), (2), (3) can be inserted on three insertion levels, whereby in successive insertion cycles (a), (b) in each case two weft threads (2), (3); (1), (2) are inserted, so that in a first (a) and a second insertion cycle (b) respectively on the top and on the bottom insertion level no weft thread is inserted, and whereby pile-forming pile warp threads (13), (14), (15) are provided during every first insertion cycle (a) above the top insertion level and during every second (b) insertion cycle under the bottom insertion level.

Abstract: A thread tensioning and drawing-back device for pile warp threads of a weaving machine, which device comprises provisions (2) for braking, by spring elements, pile warp threads (4) taken up by a weaving machine, and provisions (5) for drawing back the pile warp threads (4) in case of variations of warp length resulting from changing the shed position of the weaving machine, in which the provisions (2) for braking the pile warp threads (4) consist of disk springs (2) placed next to each other in a row on a horizontal spindle (3), each provided for braking one pile warp thread (4). The device can furthermore comprise preferably detachable tension spindles (11), (12) at the entrance to the disk yarn brakes (2) and at the exit from the disk yarn brakes (2).

Abstract: A weft selection device for a weaving machine has at least two drop wires with feed-through eyes. The drop wires are fixed rotatably in two planes lying above one another to take a weft thread extending through the feed-through eye within or beyond the reach of a gripper. Each drop wire has a bent end containing the feed-through eye. The drop wires are fixed rotatably in pairs on common fixing device. The top drop wire of each pair is bent upwards and the bottom drop wire of each pair is bent downwards. A free space is provided above and below the fixing device of each pair to allow through unimpeded the weft threads. Thus, it allows for an arrangement with a minimum angle of bend of the weft threads after they have passed through the feed-through eyes. The present weft change motion is suitable for coarse and stiff yarn.

Abstract: A device is provided for separating and tensioning warp threads in a face-to-face weaving machine of the type used for weaving at least a first fabric and a second fabric that are linked to each other, the first fabric including at least a plurality of first binding warp threads and first tension warp threads and the second fabric including at least a plurality of second binding warp threads and second tension warp threads. The device comprises a first set of rollers for separating the first binding warp threads from the first tension warp threads, a second set of rollers for causing the separated first binding warp threads to cross each other between the rollers in the second set, a third set of rollers, structurally similar to the first set, for separating the second binding warp threads from the second tension warp threads, and a fourth set of rollers, structurally similar to the second set, for causing the separated second binding warp threads to cross each other between the rollers in the fourth set.

Abstract: A weaving loom provided with a device for positioning at least one weft cutter relative to a sley of the weaving loom in a specific direction includes a holder which carries at least one weft cutter and a bearing piece accommodates the holder. The bearing piece can be fixed immovably on the sley, which itself has at least one sley leg and a first end is rotatably connected to the sley by coupling elements. The holder is mounted inside the bearing piece so that it slides in a specific direction.

Abstract: A fabric comprising binding warp threads, tension warp threads, weft threads and pile threads or a part thereof, in which binding warp threads cross each other in pairs in order to form a series of openings, and in which at least two weft threads pass through at least some of the openings. The fabric has at least two tension warp threads per pair of binding warp threads. Each pair of binding warp threads extend between two adjacent tension warp threads.

Abstract: A control mechanism for operating positively controlled openings of rapier heads of weaving machines equipped with rapiers. The control mechanism has a first and a second lateral cam and first and second rollers driven by the cams respectively. The rollers are mounted on a pivoting lever. First and second control levers are directly connected to an oscillating shaft of a cam lever, the cam lever moving to and fro by means of the cam. The cam is connected to a main shaft which transmits a uniform rotation speed to the shafts.

Abstract: A method for the production of non-fraying edges of a double woven fabric on a double-rapier loom, using a double shed crossing device comprising per shed a needle carrier, an oblique slot plate and a positioning device, characterized in that, in case of alternate weft insertion in the upper and the lower shed, a first shed positioning with crossing threads being guided between the stationary needles remains simultaneously for the upper shed and the lower shed over two successive and alternate wefts, with the preparation of the changeover of the crossing thread and the stationary thread for the next shed positioning.

Abstract: Cutting device for face-to-face weaving loom, having a cutting rail (2) on which a cutting carriage (4) moves to and fro and is connected to a rope (6) which forms a closed circuit with the cutting carriage (4) and moves to and fro, being driven by a reciprocating rotary drum (7). One or more parts of the rope are deflected around guide rollers (11, 12), (24, 25), (16, 17, 18), so that together they cause an S-shaped deflection lying both between the main frame (1,1') and a side frame (10, 19) and between the main frames (1, 1') themselves, in the same plane, with a deflection angle of at least 150 degrees.

Abstract: A control mechanism for the selection of the weft yarns in rapier looms with presenting needles on presenting levers, controlled by a plurality of levers and connecting elements from a series of electro-magnets, wherein the presenting and control levers can moves rotatably to and fro about the respective shafts on which they are mounted.

Abstract: Leno device for weaving machines, preferably double rapier weaving machines for plain velvet or carpets, designed to obtain non-fraying edges, characterized by the leno device concerned being fitted with one or more parallelograms of bars with vertical sides, the front of which is fitted with thread guides and the back of which is held in the vertical position while the adjacent bars are free to pivot around pivot points at the corner points of the parallelogram, so that the thread guides can move up- and downwards.