Abstract: For producing woven fabrics with additional pattern effects, one or more effect threads are supplied substantially in the warp direction and are moved over neighboring warp threads in the weft direction, above a weft thread that is to be inserted, in various motion cycles of a weaving machine. Subsequently the effect threads are positioned below a subsequent weft thread, by submerging the effect threads into upwardly open reed gaps of a reed. To facilitate this, the reed includes first reed blades which, at their upper end, each include a sloping thread guide element projecting in the longitudinal direction of the reed, so as to at least partially extend over the upwardly facing opening of a neighboring reed gap. The reed further includes second reed blades having no such sloping thread guide elements. The guide elements guide the effect threads down into the proper reed gaps.

Abstract: On a weaving machine for the production of woven fabrics with additional pattern effects, one or more effect threads (2) that are supplied substantially in the warp direction are slidingly displaced passing over neighboring warp threads (1) in the weft direction (12) above a weft thread (3) that is to be inserted, for various motion cycles of the weaving machine. During the following positioning of the effect threads (2) below the weft thread (3) to be inserted, the effect threads (2) submerge into one-sided upwardly open reed gaps (8) of a reed (4). In order to assist the submerging of the effect threads (2) into the reed gaps (8), a reed (4) is equipped with a first group of reed blades (5) which, at their upper end, comprise an insertion bevel (7) facing in the longitudinal direction of the reed (4). These are configured such that thereby the upwardly facing opening of a neighboring reed gap (8) is at least partially covered.

Abstract: A loom, especially an air jet loom for producing a leno cloth with integrated patterning includes a weaving reed and first and second shed forming devices. The first shed forming device includes a pivotable reed as a first guide arrangement for guiding and shedding leno warp threads, and an upright reed as a second guide arrangement for guiding and shedding ground warp threads, to form leno bindings. The second shed forming device includes a third guide arrangement for guiding and shedding patterning warp threads, to form pattern bindings. The third guide arrangement is arranged between the first shed forming device and the weaving reed.

Abstract: A loom, especially an air jet loom for producing a leno cloth with integrated patterning is characterized in that a first shed forming device (6) encompasses a first guide means (6a) embodied as a pivotable reed, the drive of which is derived from the reed shaft of the loom, and encompasses a second guide means (6b) embodied as a standing or upright reed, which has a drive that is independent from the drive means 14 of the first guide means (6a). The loom is further characterized in that a second shed forming device 7 is provided, of which the shed forming means (7b) can be arranged between the first device (6) and the weaving reed (11) of the loom.

Abstract: A leno cloth is prepared, which comprises at least ground warp threads 1, leno warp threads 3 and weft threads 2, and in which the weft threads 2 and the ground warp threads 1 are arranged essentially interspace free. The weft threads are bound-off by means of the leno warp threads 3, which comprise a clearly lower titer relative to the ground warp threads 1, with such a lower tension relative to the ground warp threads, so that the crossings of the leno warp threads 3 with the ground warp threads 1 that are present due to the binding are arranged in a plane parallel to the plane of the maximum thickness of the weft threads. The leno warp threads 3 comprise a higher working-in or take-up into the woven cloth than the ground warp threads 1. According to a further aspect of the invention, a method for the production of a leno cloth as well as a loom for the carrying out of the method for the production of a leno cloth are described.

Abstract: A loom simultaneously forms a plain weave (16) and a gauze weave (15) in a textile (9) in one weaving cycle. To form the plain weave (16), the adjacent warp threads (1L,2L) that are used to form the upper shed and lower shed are alternately lifted from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position by the same drop wire/needle shank (4). To form the gauze weave (15), only the warp threads (2D) that form the upper shed are raised by the drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position.

Abstract: A leno cloth is prepared, which comprises at least ground warp threads 1, leno warp threads 3 and weft threads 2, and in which the weft threads 2 and the ground warp threads 1 are arranged essentially interspace free. The weft threads are bound-off by means of the leno warp threads 3, which comprise a clearly lower titer relative to the ground warp threads 1, with such a lower tension relative to the ground warp threads, so that the crossings of the leno warp threads 3 with the ground warp threads 1 that are present due to the binding are arranged in a plane parallel to the plane of the maximum thickness of the weft threads. The leno warp threads 3 comprise a higher working-in or take-up into the woven cloth than the ground warp threads 1. According to a further aspect of the invention, a method for the production of a leno cloth as well as a loom for the carrying out of the method for the production of a leno cloth are described.

Abstract: In a weaving machine for the production of a leno fabric including ground, leno, and weft threads, in which ground and leno threads form warps, the drive of the guide means (8) for the ground threads and/or of the guide means (7) for the leno threads (2) is derived from the drive means of the sley.

Abstract: The aim of the invention is to obtain a plain weave and gauze weave in a textile that is to be produced, in one weaving cycle, thus economising in terms of expensive shed-forming elements. To achieve this, according to the invention, the plain weave (16) and gauze weave (15) are formed simultaneously in the textile (9) in one weaving cycle. To form the plain weave (16), the adjacent warp threads (1L,2L) that are used to form the upper shed and lower shed are alternately lifted by the same drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position. To form the gauze weave (15), only the warp threads (2D) that form the upper shed are raised in a known manner by the drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position.

Abstract: The filaments in a weft thread or yarn in a pneumatic loom are tangled and consolidated to prevent untangling of the weft thread when it is transported, after the tangling, through the weft insertion channel in a loom shed. For this purpose the leading end of the weft thread is temporarily stopped in a weft insertion nozzle pipe by a first air stream the so-called holding air stream (19) with a first pressure (P1) between two weaving cycles following each other for holding the weft thread stretched. At the same time a second air stream (20) having a higher pressure (P2) than the first pressure (P1) and a different flow direction than the first air stream (19) is applied to or along a leading end portion of the weft thread for tangling the filaments and thereby locking or consolidating the filaments in the weft thread. Each weft insertion nozzle pipe has a first port and a second port through which the first and second air streams are introduced into the weft insertion the nozzle pipe.

Abstract: The invention relates to a method for the taut-holding of the weft thread (15) in the mixing tube (4) of the main nozzle (1) of an air jet loom, and an air jet loom for the carrying out of the method. The invention has the underlying technical object of avoiding an air stream effective over nearly the total length of the main nozzle (1) and disadvantageously influencing the structure of the weft thread (5) during its idle phase in the main nozzle (1), and nonetheless holding the weft thread (5) taut in the main nozzle (1). This is achieved in that the air stream, during the idle phase of the weft thread (5), impinges on only its front end (5a) in the mixing tube of the main nozzle.

Abstract: In a weaving machine for the production of a leno fabric including ground, leno, and weft threads, in which ground and leno threads form warps, the drive of the guide means (8) for the ground threads and/or of the guide means (7) for the leno threads (2) is derived from the drive means of the sley.

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: In a loom with a mechanical weft insertion the motion of each individual warp thread on its way from an uppermost position to a lowermost position and vice verse is controlled individually by a jacquard in such a way, that the motion profile includes a shed stopping in a weft entrance section and simultaneously in a weft exit section of a weaving width of the loom. Shed stopping is avoided in an intermediate section between the weft entrance and exit sections of the weaving width of a loom thereby providing sufficient time for the rapiers or grippers to be withdrawn from the shed without damaging the warp threads.

Abstract: An arrangement for supplying air with a controlled pressure to the main weft insertion nozzles of an air jet loom includes a single servovalve connected between a pressurized air source, an air vent, and a pressure manifold, and individual shut-off valves respectively interposed in branch lines connected from the pressure manifold to the individual nozzles. A pressure sensor measures the actual pressure provided to the manifold. An electronic controller receives a pressure control signal and controls the servovalve responsive to any difference between the pressure control signal and the actual measured pressure signal. The arrangement is simple, economical, and rapidly reacting, to avoid the need of individual throttle valves or pressure regulators for the individual nozzles.

Abstract: The filaments in a weft thread or yarn in a pneumatic loom are tangled and consolidated to prevent untangling of the weft thread when it is transported, after the tangling, through the weft insertion channel in a loom shed. For this purpose the leading end of the weft thread is temporarily stopped in a weft insertion nozzle pipe by a first air stream the so-called holding air stream (19) with a first pressure (P1) between two weaving cycles following each other for holding the weft thread stretched. At the same time a second air stream (20) having a higher pressure (P2) than the first pressure (P1) and a different flow direction than the first air stream (19) is applied to or along a leading end portion of the weft thread for tangling the filaments and thereby locking or consolidating the filaments in the weft thread. Each weft insertion nozzle pipe has a first port and a second port through which the first and second air streams are introduced into the weft insertion the nozzle pipe.

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: In a loom with a mechanical weft insertion the motion of each individual warp thread on its way from an uppermost position to a lowermost position and vice verse is controlled individually by a jacquard in such a way, that the motion profile includes a shed stopping in a weft entrance section and simultaneously in a weft exit section of a weaving width of the loom. Shed stopping is avoided at least in the center of the warp shed, namely in an intermediate section between the weft entrance and exit sections of the weaving width of a loom thereby providing sufficient time for the rapiers or grippers to be withdrawn from the shed without damaging the warp threads.

Abstract: An arrangement for supplying air with a controlled pressure to the main weft insertion nozzles of an air jet loom includes a single servovalve connected between a pressurized air source, an air vent, and a pressure manifold, and individual shut-off valves respectively interposed in branch lines connected from the pressure manifold to the individual nozzles. A pressure sensor measures the actual pressure provided to the manifold. An electronic controller receives a pressure control signal and controls the servovalve responsive to any difference between the pressure control signal and the actual measured pressure signal. The arrangement is simple, economical, and rapidly reacting, to avoid the need of individual throttle valves or pressure regulators for the individual nozzles.

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.