Abstract: A device feeds first and second weft threads in a weft direction to a gripper head of a loom and includes a coupling unit that moves back and forth in a warp direction. A first and a second feed unit are adjacently arranged in the warp direction on the coupling unit and are configured to feed the first and the second weft threads to the gripper head. A positioning unit moves the coupling unit in the warp direction in a first position of the coupling unit and counter to the warp direction in a second position of the coupling unit. The first feed unit feeds the first weft thread to the gripper head when the coupling unit is in the first position and the second feed unit feeds the second weft thread to the gripper head when the coupling unit is in the second position.

Abstract: A weaving machine includes a shed forming device, a weft insertion device, and a weaving reed that beats up the weft threads at a beat up plane against an edge of the woven fabric. A guide device extends over a width of the woven fabric and is driven by a drive, the guide device being one or both of an upper guide unit that contacts a top surface of the woven fabric or a lower guide unit that contacts a bottom surface of the woven fabric. One or both of the upper and lower guide units are positionable in a direction of thickness of the woven fabric to contact and guide the woven fabric in an area of the beat up plane. The guide section of one or both of the upper and lower guide units has a profiled shape in a weft direction to guide the woven fabric at different thicknesses in the weft direction.

Abstract: A weaving machine includes a shed forming device, a weft insertion device, and a weaving reed that beats up the weft threads at a beat up plane against an edge of the woven fabric. A guide device extends over a width of the woven fabric and is driven by a drive, the guide device being one or both of an upper guide unit that contacts a top surface of the woven fabric or a lower guide unit that contacts a bottom surface of the woven fabric. A control unit controls alternating movement of the guide unit along the direction of thickness of the woven fabric as the fabric is being woven based on information related to one or both of a structure of the woven fabric in the area of the beat up plane or a position of the warp threads in the open loom shed.

Abstract: The invention relates to various mutually combinable embodiments of a weaving machine or loom that comprises at least one guide device with at least one guide unit (32, 34) for the contacting guidance of a woven fabric (82) in the area of the weaving reed beat-up plane (14). In this regard, according to an embodiment, a control unit (15) is provided, which is embodied for controlling at least one drive (38, 39) for the at least one guide unit (32, 34), wherein for the actuation the control unit (15) processes informations that are related to the woven fabric structure in the area of the weaving reed beat-up plane (14), and/or informations regarding the position of the warp threads (80a, 80b) in the open loom shed. The invention also relates to methods for guiding a woven fabric in the area of the weaving reed beat-up plane (14).

Abstract: Apparatus for the intermediate storage of two band-like weft materials (1, 21) for a weaving machine (3), with two storage containers (7, 27) in which respectively a U-shaped loop (12, 22) of a weft material (1, 21) can be formed. Machine elements (14, 34) for the application of tensile forces (15, 35) onto the weft material (1, 21) in the inner space (9, 29) of the respective storage container (7, 27) are present. The inner spaces (9, 29) of the two storage containers (7, 27) respectively orient one of their two narrow sides (10, 30) toward one another. Deflection elements (16, 36) are respectively arranged on the storage container (7, 27) in such a manner so that the respective weft material (1, 21) can be supplied to the inner space (9, 29) in a region (17, 37) that lies closer to that one of the two narrow sides (11, 31) of this inner space (9, 29), which is not oriented toward the inner space (9, 29) of the respective other storage container (7, 27).

Abstract: Apparatus for the intermediate storage of two band-like weft materials (1, 21) for a weaving machine (3), with two storage containers (7, 27) in which respectively a U-shaped loop (12, 22) of a weft material (1, 21) can be formed. Means (14, 34) for the application of tensile forces (15, 35) onto the weft material (1, 21) in the inner space (9, 29) of the respective storage container (7, 27) are present. The inner spaces (9, 29) of the two storage containers (7, 27) respectively orient one of their two narrow sides (10, 30) toward one another. Deflection elements (16, 36) are respectively arranged on the storage container (7, 27) in such a manner so that the respective weft material (1, 21) can be supplied to the inner space (9, 29) in a region (17, 37) that lies closer to that one of the two narrow sides (11, 31) of this inner space (9, 29), which is not oriented toward the inner space (9, 29) of the respective other storage container (7, 27).

Abstract: A weaving machine for producing a woven fabric has a shedding device to form a loom shed of warp material, a weft insertion device for inserting a preferably tape-shaped or band-shaped weft material into the loom shed, a drawing-off device for drawing off the finished fabric in a drawing-off direction, fabric movement device for moving the fabric back and forth in the warp direction to bring the last inserted weft material into contact with the binding point or fabric edge. A shed limiter device limits the opening of the loom shed from above and below the warp, and is movable back and forth in the warp direction. The shed limiter device only loosely bounds the fabric and essentially without actively clamping or pinching or contacting the fabric and/or the last inserted weft material, at least while moving in the direction opposite the drawing-off direction.

Abstract: Weaving machine (1) for producing a woven fabric (9) with shedding means (4) for alternately raising and lowering warp material (3) for forming a loom shed (5), with weft insertion means (6), which are arranged stationarily in the warp direction in a weft insertion zone (14), and which are for inserting a preferably tape-shaped or band-shaped weft material (7) into the loom shed (5), with drawing-off means (8) for drawing off the finished goods or woven fabric (9) in a drawing-off direction (AR), as well as with means (13, 10) for the fabric movement in the warp direction, by means of which the fabric edge (12) is moveable back and forth in a goods movement range (WB) between a downstream initial position (AG) and an upstream collecting or pick-up position (AH), in order to bring the respective last inserted weft material (7) into contact with the fabric edge (12) in the pick-up position (AH), characterized in that furthermore upper and lower limiting means (16) are provided, which limit the opening of the lo

Abstract: For transferring a preferably band-shaped weft material from a feed unit to an insertion element of a weaving machine, a free end of the weft material is clamped in a clamping device, the free end is transferred to the insertion element, and then the clamping device is opened to release the weft material, which is then inserted by the insertion element. The clamping device is conveyed by a drive essentially in the direction of motion of the insertion element between at least two different operating positions.

Abstract: A device (1) for transferring a preferably band-shaped weft material (6) from a feed unit to an insertion element (4) of a weaving machine comprises a clamping device (5) for clamping a free end (E) of the weft material (6). The clamping device (6) is conveyable essentially in the direction (BR) of motion of the insertion element (4) between at least two different operating positions. The device (1) includes a drive (8) for conveying the clamping device (5). In a method for transferring a preferably band-shaped weft material (6) from a bobbin or a feed unit to an insertion element (4) of a weaving machine, a free end (E) of the weft material (6) is clamped in a clamping device (5), the free end (E) is transferred to the insertion element (4), and then the clamping device (5) is opened and the weft material is inserted. The clamping device (5) is conveyed by means of a drive (8) essentially in the direction of motion of the insertion element (4) between at least two different operating positions.

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 reed drive of a loom includes a reed shaft connected to a reed. A conversion gearing having an input element and an output element is provided at each end of the reed shaft. The input elements are coupled to driven shafts of electromotive rotary drives to produce a common rotational motion with the same rotational speed as the driven shafts. The conversion gearings convert the rotating motion of their input elements into a reversible rotation of the output elements, and the output elements are coupled to the reed shaft in a rotationally fixed manner. Thus, the number of complete rotations of an input element is equal to the number of complete motion cycles of the reed shaft per unit of time.

Abstract: The invention relates to a jet-weaving machine, particularly an air jet-weaving machine, which comprises a main discharge nozzle (1) with a mixing tube (2) for introducing a weft thread (3) into a shed by means of a conveying fluid discharged from the main discharge nozzle (1), and comprises a clamping device. This clamping device is placed inside the mixing tube (2) in the area from which the weft thread exits, and is provided with an actuator, which is situated outside of the mixing tube (2) and with a lever that is connected thereto in such a manner that this lever, when actuating the actuator (6) via an actuating means or when the actuation is stopped, executes a tilting motion whereby clamping the weft thread in an opening of the mixing tube between itself and an abutment (9).

Abstract: A reed drive of a loom comprises a reed shaft (3) connected to the reed (1). A conversion gearing (7, 8) each having a respective input element (11, 12) and a respective output element (13, 14) is located at the ends of the reed shaft (3). The input elements (11, 12) are coupled to the driven shafts (23, 24) of electromotive rotary drives (19, 20) for effecting a common rotational motion of the same rotational speed. The conversion gearings (7, 8), alone, serve to convert the rotating motion of their input elements into a motion of the output elements (13, 14) whose direction of rotation can be reversed. To this end, the output elements (13, 14) are coupled to the reed shaft (3) in a rotationally fixed manner.

Abstract: Ground warp and pile warp thread sheets are supplied to a shed forming device. The ground warp and the pile warp are separately deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before deflecting the pile warp into the back shed. The deflecting rod is positively driven and controlled to pivot about a horizontal axis to provide a positive controlled partial compensation of the pile warp thread length variations. The pile warp also runs over a pile warp thread reserve and compensating device upstream from the thread crossing location to provide an additional passive uncontrolled compensation of the pile warp thread length variations and to provide a pile warp thread reserve during the pile loop formation and/or the shed changes in the weaving process.

Abstract: Ground warp and pile warp thread sheets are supplied to a shed forming device. The ground warp and the pile warp are separately deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before deflecting the pile warp into the back shed. The deflecting rod is positively driven and controlled to pivot about a horizontal axis to provide a positive controlled partial compensation of the pile warp thread length variations. The pile warp also runs over a pile warp thread reserve and compensating device upstream from the thread crossing location to provide an additional passive uncontrolled compensation of the pile warp thread length variations and to provide a pile warp thread reserve during the pile loop formation and/or the shed changes in the weaving process.