Abstract: The present invention relates to a method for weaving pile fabrics on a face-to-face weaving machine, where, in successive insertion cycles, weft yarns (1-12) are inserted between binding warp yarns (13-16) and pile warp yarns (17-24), so that two backing fabrics (30), (31) are woven one above the another, in which groups of at least four weft yarns (1-6); (7-12) are inserted in respective openings between repeatedly crossing binding warp yarns (13), (14); (15), (16), so that each group of weft yarns (1-6); (7-12) comprises at least two pairs of weft yarns (2,3), (5,6), (8,9), (11,12) inserted above one another, and so that pile warp yarns (18), (21), (24) are interlaced in the upper (30) and in the lower backing fabric (31) alternately round the weft yarns (2), (5), (8), (11), situated on the back, of the said pairs in order to form pile burls, preferably according to a two-shot weave; The present invention likewise relates to pile fabric woven according to this method.

Abstract: A device is provided for driving one or several pile carriers (2) for the selection of one or several pile yarns (15), comprising at least one drive motor (4) for driving a pile carrier (2), the pile carrier moving under the motor housing (7) of the drive motor and the motor shaft (5) of the drive motor (4) being provided with driving means (6) for directly driving the pile carrier (2), the pile carrier (2) being provided for performing a linear back and forth movement.

Abstract: A first (1) and a second connecting means (2) which may be connected in a detachable manner in order to connect a first and a second cord, more particularly a lifting cord and a harness cord of a Jacquard machine, the first connecting means (1) comprising an elastically deformable coupling element (3) which may be received in a receiving part (4) of the second connecting means and may be retained in axial direction, the second connecting means (2) comprising a passage (5) through which the coupling element (3), compressed in the radial direction, may be moved to the receiving part (4) and the coupling element (3) in the receiving part (4) having the possibility of adopting a larger radial dimension than is necessary to be moved through the passage (5), so that the coupling element (3) snap-fits in the receiving part (4). In the receiving part (4), the coupling element (3), by rotation around the longitudinal axis (A), may be brought into a disengaging position in which it is not retained.

Abstract: A face-to-face weaving machine comprising upper (5) and lower spacers (6) for extending in the warp direction between two fabrics (12), (13) and a weft insertion device (2), (3), (4) for inserting weft yarns (22) between the spacers (5), (6), said spacers being carried out as a rigid element with a first (5c), (6c) and a second part (5B), (6B), the vertical intermediate distance between the first parts (5c), (6c) of the spacers (6) being shorter than said distance between the second parts (5B), (6B) such that the weft yarns (22) can be inserted between said second parts (5B), (6B).

Abstract: A method and a device for controlling a winder, where the winding torque (Tw), during winding, is controlled as a function of the desired tractive force in the material to be wound. During winding, repeatedly is calculated which value a quantity (Vl), influencing the winding torque (Tw), has to adopt in order to obtain a desired tractive force (Fw), and an adjustment of the said quantity (V1) is carried out, the calculated value being used as an objective value. Preferably, the calculation is done by an algorithm, expressing the said quantity as a function of the desired tractive force (Fw), as a function of one or more fixed parameters which are characteristic for winding up material or for the winder, and as a function of one or more variable parameters, being measured or calculated during winding. The device also relates to a winder comprising a winding body (1), (2) for winding a material, a drive device (3,9),(4,10) for driving this winding body (1), (2) an a control device.

Abstract: The invention relates to a device for attaching to a face-to-face weaving machine cylindrical upper and lower temples of the type having inclined toothed rings provided on shanks, the shanks of the upper and lower temples being attached to separate L-shaped upper and lower temple holder plates, in such a manner the temple shanks, pointing to the center of the weaving machines, are attached to the leg of the L-shaped holder plate placed in the warp direction, whereas the other leg of the L-shaped holder is directed towards the outside of the weaving machine and, in a manner adjustable in the warp-direction, is attached to a horizontal connecting piece, itself, in a manner adjustable as to height, being attached to a vertical holder.

Abstract: The invention relates to a face-to-face weaving machine with face-to-face shed forming, a twister device (1) being provided and relates further to a twister device (1) for a face-to-face weaving machine with face-to-face shed forming, the twister device (1) being situated between weaving frames (11), mutually provided with a free space and a weaving reed (12) and the twister device (1) being provided with means (2) for positioning a first series of warp threads (101) in waving means, means (3) to wave the first series of warp threads (101) and means (4) to cause a second series of warp threads (100) to move up and down, said means (4) to cause a second series of warp threads (100) to move up and down being driven by a driving device (19) provided with a casing (7), and said means (2) for positioning a first series of warp threads (101) in waving means, said means (3) to wave the first series of warp threads (101) and said means (4) to cause a second series of warp threads (100) to move up and down being attac

Abstract: A device for separating warp yarns (16), (17) on a face-to-face weaving machine (13), comprising a separating means (1), (2) and a holding device (3,7,9,11), (4,8,9,12) which comprises a threaded adjusting means (11), (12), the adjusting means (11), (12) being provided in such a manner that its rotation will cause the separating means (1), (2) to be moved, because of which the holding height will be changed and adjusted and the adjusting means (11), (12) being able to maintain the adjusting means (1), (2) at the adjusted holding height. Moreover, the holding device (3,7,9,11), (4,8,9,12) will enable an adjustment in the warp-direction. With a similar device adjusting the holding height can be carried out in a very simple and accurate manner and whilst being adjusted the separating means (1), (2) will be unable to make any unwanted and dangerous movements.

Abstract: Device for energizing a number of coils of a hook selection device for a weaving machine includes an electrical power supply source connected to the coils and a regulating device for regulating the current intensity in the coils. Each coil includes: a comparator for comparing the current intensity in the coil to a reference current intensity and a controllable current regulator (e.g. a chopper transistor) for regulating the current intensity in the coil in order to reach or approach the reference current intensity. The regulating device includes an electronic control circuit that is provided to control the current regulator of each coil of a number of coils, in order to reduce a variance between the actual current intensity in that coil and the reference current intensity measured by the comparator of that coil.

Abstract: A face-to-face weaving machine with face-to-face shed forming has a passage for, and access to, the weaving frames without being hampered by a rear traverse. The face-to-face weaving machine with face-to-face shed forming is provided in which the weaving machine has no rear traverse.

Abstract: A yarn tightening element for a weaving machine, comprising a passage (16) for a yarn (15) and a contact means (2) to transmit a tightening force to a yarn (15) moving along through this passage, the passage (16) being not bordered on at least one side of the plane of movement of the yarn (15) or comprises a boundary (14) that is interrupted across its width, so that a part of the yarn (15) running through from that side of the plane of movement, via the interruption (17), can be made to co-operate with the contact means (2). Said boundary is, for instance, formed by one or more fingers (14) directed downwards, while said interruption (17) of this boundary (14) is formed between the extremities of each finger (14) and a part (8) of the yarn tightening element. Such a yarn tightening element can be placed on a yarn very easily and quickly by means of a hooking on movement and be removed again by means of an equally simple hooking off movement.

Abstract: A three-position shed-forming device with a shed-forming element (10);(60,70) in connection with a warp yarn, two lifting devices (1),(2);(41),(42);(51),(52) with a different lifting height (h), (2h) which are movable up and down in phase, and a selection device (20,21); (83,84) (93,94) in order to have the shed-forming element carried along either by the first lifting devices (1);(41);(51) or by the second lifting devices (2);(42);(52) or by none of the lifting devices. A similar device is able to bring, during successive weft insert cycles, a warp yarn alternately into the lower position and in any of the upper, center and lower positions, and has no pulley block elements.

Abstract: A device for adjusting the tension of pile warp yarns in a face-to-face weaving machine comprises a first (14) and a second yarn guiding element (11), the second yarn guiding element (11) adjusting the tension in the pile warp yarns (100) by deflection. A pneumatic system (16) is provided, where the pressure in the pneumatic system (16) determines the deflection of the second yarn guiding element (11) and where the pneumatic system (16) is provided to maintain the pressure at a practically constant value, adjustable via a control system. The device is further provided so that the tension in the pile warp yarns (100) is adjustable by adjusting a certain pressure in the pneumatic system (16).

Abstract: Drop pin for stop motion (1) comprising a body (2) with a yarn lead-through opening (3) provided to rest on a thread extending through this opening (3). The drop pin is supported by a supporting surface or edge (4), forming a concavely curved bordering of this opening (3) and which, in cross-section, has a convex form. The supporting surface (4) may have a rounded spherical form or a form with a number of angle forming sides, such as for instance a polygon. Preferably, the yarn lead-through opening (3) is circular. Also provided is a device for detecting the thread breakage on a weaving machine, comprising a number of similar drop pins for stop motion and a weaving machine provided with a similar device.

Abstract: A pulley-less shed-forming device for a weaving machine, such as a jacquard machine, has a number of shed-forming elements (1), such as hooks, to determine the positions of one or more warp yarns on a weaving machine. A lifting device (50), (51) moves the shed-forming elements (1) up and down. At least one actuator (40)-(44), (80), (83) is provided for selectively influencing the shed-forming element (1), so that it is either kept at a fixed height, or is moved by means of the lifting device (50), (51). The element (1) has at least one selection body (7), (8), (9) which, for said selective influencing, may be moved into first or second stable positions, as desired, by an actuator (40)-(44), (80), (83) forming a shed-forming element (1) in itself. It may also be formed as a device without a pulley. Because the positions of the selection body are stable, their position may be changed by a single temporal influence by the actuator making the device energy efficient.

Abstract: A device for guiding the knife-supporting beams in a jacquard machine is provided. The device is for rectilinear guiding of a body (1) of a shed-forming device that can be driven in a back and forth movement. The device has a rod mechanism (2, 3, 4) of which a first (2) and a second rod (3) are rotatably connected to respectively the aforesaid body (1) and a fixed part (11). This rod mechanism is provided to exert a rectilinear movement on the joint (5) between the body (1) and the first rod (2) while driving the body (1). The joint (5) between the first rod (2) and the body (1) moves for that purpose preferably in a straight line through the joint (7) between the second rod (3) and the fixed part (11). This device is especially utilized as a shed-forming device of a machine of the Jacquard type for the rectilinear guiding of knife-supporting beams. Such a rectilinear guide has the advantage that it can be implemented with only hinge points that require no maintenance.

Abstract: A method for manufacturing a loop pile fabric with a varied appearance includes a woven backing fabric. Loop weft yarns (12A), (12B) are provided outside the backing fabric, and loop warp yarns (1), (2), (3) are so provided that they are alternately inwoven in the backing fabric and form a pile loop (13), (14) over at least one loop weft yarn (12A), (12B), and the loop weft yarns (12A), (12B) are subsequently removed. By providing first (12A) and second loop weft yarns (12B) with a different thickness, pile loops (13), (14) of different height are formed. To obtain a fabric in which both pile loops (13) and cut pile (15) occur subsequently a top part can be removed from a number of pile loops (13). In areas (19) where no pile loops are formed effect backing weft yarns (11B) with laterally protruding filaments can be inwoven in the backing fabric. A loop pile fabric can be manufactured according to this method.

Abstract: In face-to-face weaving pile fabrics with high pile density, groups of three weft yarns (1-3), (4-6) are inwoven in respective openings between binding warp yarns (7), (8), (9) (10) crossing each other, and non-pile-forming pile warp yarns are inwoven, while pile warp yarns are alternately interlaced in the top and the bottom backing fabric over a weft yarn according to a two-shot weave. In series of four successive weft insertion cycles in each case three weft yarns (1), (2), (3) are inserted for the top backing fabric (30) and three weft yarns (4), (5), (6) for the bottom backing fabric (31). A weaving machine inserts two weft yarns one above the other per weft insertion cycle and by weft disengagement or weft cancellation in the course of two cycles per series inserts only one weft yarn. Two pile-forming pile warp yarns after a pile change are interlaced over a weft yarn.

Abstract: A hook selection device for a shed-forming device for a weaving machine, in particular for a jacquard machine, has a number of hooks (3), (4) that can be moved up and down by a lifting means (1), (2). For each hook, there is a selection element with which the hook can be selected for being held by a holding element (5), (6) at a selection height. A resetting device (7) exerts a downward directed resetting force on the hook (3), (4), only during the movement on a path of the hook. The resetting device (7) is provided to transmit the resetting force to a contact part (8) of the hook that is lower than the top hook extremity, while each resetting device comprises a pressure device (10), which can be moved upward by a hook (3), (4) against a downward directed spring pressure.

Abstract: A fabric with a rib structure, in particular a false boucle carpet, with cut pile (13) and/or pile loops (12) is formed by a method for weaving such a fabric. On a weaving machine, such as a rod weaving machine, a backing fabric is woven by bringing weft yarns (1), (2), (3) between warp yarns (4-9) in successive weft insertion cycles, alternately weaving in warp yarns (7), (8) in the backing fabric and rib-formingly passing them around over at least one weft yarn (3). In a number of weft insertion cycles a loop-forming element (10), such as for example a wire or a wire with a blade, is provided above the backing fabric and at least one pile warp yarn (7), (8) is loop-formingly passed around over this loop-forming element (10). This method enables weaving of a fabric with a very varied appearance, because apart from the false boucle effect, areas with pile loops (12) and/or areas with cut pile (13) can also be obtained.