Abstract: A method for the insertion of a weft thread (2) into a shed of an air jet weaving machine (1) is presented in which the weft thread drawn from the thread store (21) is accelerated by means of an acceleration nozzle (3, 4) and supplied to the shed; the weft thread is transported further in the shed by means of a plurality of auxiliary nozzles (5.1 a-c to 5.n a-c); and measured values dependent on the speed of the weft thread and/or on the path traveled by the weft thread are measured in contact-free manner by means of one or more measurement pickups (7.1, 7.2, 17). In the method at least one of the measurement pickups is formed for multiple measurement within the weft insertion and is arranged at or after a first acceleration nozzle (3). Furthermore, measured values are measured in contact-free manner a plurality of times during the weft insertion by means of the at least one measurement pickup (6, 6.1-6.

Abstract: In accordance with the invention a thread carrying apparatus is proposed with a thread (2) lying in contact with or passing along the thread carrying apparatus with friction in the operating state. The thread carrying apparatus includes excitation means (3) for producing oscillations which reduce the frictional force between the thread (2) and the thread carrying apparatus. In this arrangement a resonator body (4) is provided with the thread (2) lying in contact with or passing along the resonator body with friction in the operating state. The resonator body (4) is designed in such a manner that the excitation means (3) produce resonant structural sound oscillations in the resonator body (4).

Abstract: A weaving machine having an apparatus for tucking in one or more weft thread ends (2?a) and for forming a cloth edge (10) as well as a shed forming apparatus for forming a shed (14) with a shed apex (14a). The apparatus for tucking in one or more weft thread ends (2?a) includes an air tucker (4) which is arranged outside the cloth width (12) and at least one additional blowing nozzle (6) which is arranged within the cloth width (12), and the jet direction (6a) of which is oriented towards the shed apex (14a) in order to be able to blow the weft thread ends (2?a) into the shed apex.

Abstract: The invention relates to a method (1) for braking a weft thread (3) of a jet weaving machine (10), in said method (1) a braking element (2) being brought into contact with the weft thread (3), with the braking element (2) being moved by means of a drive (21) in accordance with a predeterminable distance/time plot so that the weft thread (3) is deflected by the braking element (2) in accordance with a position function (23), so that the weft thread (3) is braked in accordance with a braking profile (31), characterized in that the position function (23) is matched to the braking profile (31) of the weft thread (3).

Abstract: The weaving machine comprises a needle bar (3) and an insertion-element (4) with which warp threads (13, 14) are guided and which are two components of a shed forming apparatus for the manufacture of leno cloths (1). The two components are moved vertically in a reciprocal manner. A horizontal displacement movement (40b) transverse to the direction of the warp thread is executed with the insertion element in addition to the vertical movement (40a) The movements of the two components cause a leno binding to take place in interplay with the insertion of a weft thread (12, 12?). The shed forming apparatus can be modified such that, on the one hand, the horizontal displacement movement (40b) of the insertion element is switched off and, on the other hand, for both components a stroke (h) of the vertical movement (30, 40a) is in each case increased and controlled in such a manner that a cloth without leno binding, in particular a simple cloth (1?), can be manufactured.

Abstract: A weaving machine having an apparatus for tucking in one or more weft thread ends (2?a) and for forming a cloth edge (10) as well as a shed forming apparatus for forming a shed (14) with a shed apex (14a). The apparatus for tucking in one or more weft thread ends (2?a) includes an air tucker (4) which is arranged outside the cloth width (12) and at least one additional blowing nozzle (6) which is arranged within the cloth width (12), and the jet direction (6a) of which is oriented towards the shed apex (14a) in order to be able to blow the weft thread ends (2?a) into the shed apex.

Abstract: A sley apparatus for a weaving machine which has a sley profile (1), a reed (2) and a drive (3), with the sley profile (1) carrying the reed (2) and being in active connection with the drive (3). The sley profile (1) has at least two separate parts, namely a main profile part (4) and an auxiliary profile part (5), with the auxiliary profile part (5) being releasably connected directly or indirectly to the main profile part (4).

Abstract: The invention relates to an air jet weaving machine 1 with compressed air supply components for supplying air nozzles 3, 4, 5 and 6 with compressed air. The compressed air supply components comprise a compressed air infeed line with a main shut-off valve and an air filter as well as solenoid values and pressure regulators for controlling and regulating the compressed air which is supplied to the air nozzles, with some of the compressed air supply components being collected in a separate compressed air supply unit 10 which is arranged to be separate from the rest of the weaving machine.

Abstract: In accordance with the invention a thread carrying apparatus is proposed with a thread (2) lying in contact with or passing along the thread carrying apparatus with friction in the operating state. The thread carrying apparatus includes excitation means (3) for producing oscillations which reduce the frictional force between the thread (2) and the thread carrying apparatus. In this arrangement a resonator body (4) is provided with the thread (2) lying in contact with or passing along the resonator body with friction in the operating state. The resonator body (4) is designed in such a manner that the excitation means (3) produce resonant structural sound oscillations in the resonator body (4).

Abstract: Proposed is a sley apparatus for a weaving machine, having a sley profile (1), a reed (2) and a drive (3), with the sley profile (1) carrying the reed (2) and being in active connection with the drive (3). In this the sley profile (1) comprises at least two separate parts, namely a main profile part (4) and an auxiliary profile part (5), with the auxiliary profile part (5) being releasably connected directly or indirectly to the main profile part (4).

Abstract: The weaving machine comprises a needle bar (3) and an insertion element (4) with which warp threads (13, 14) are guided and which are two components of a shed forming apparatus for the manufacture of leno cloths (1). The two components are moved vertically in a reciprocal manner. A horizontal displacement movement (40b) transverse to the direction of the warp threads is executed with the insertion element in addition to the vertical movement (40a). The movements of the two components cause a leno binding to arise in interplay with the insertion of a weft thread (12, 12′). The shed forming apparatus can be modified such that, on the one hand, the horizontal displacement movement (40b) of the insertion element is switched off and, on the other hand, for both components a stroke (h) of the vertical movement (30, 40a) is in each case increased and controlled in such a manner that a cloth without leno binding, in particular a simple cloth (1′), can be manufactured.

Abstract: The invention relates to an air jet weaving machine 1 with compressed air supply components for supplying air nozzles 3, 4, 5 and 6 with compressed air. The compressed air supply components comprise a compressed air infeed line with a main shut-off valve and an air filter as well as solenoid valves and pressure regulators for controlling and regulating the compressed air which is supplied to the air nozzles, with some of the compressed air supply components being collected in a separate compressed air supply unit 10 which is arranged to be separate from the rest of the weaving machine.

Abstract: A method and a device limit the normal shed opening angle (&agr;) of warp threads in an open loom shed, to a smaller limited shed opening angle (&agr;1) that applies to the selvedge warp threads over a selvedge laying-in width at the edge of the fabric. The limited shed opening angle (&agr;1) is smaller than the normal shed opening angle (&agr;) and is selected to provide optimal positioning and binding-in of the free thread end of a beat-up weft thread that is guided back and laid or tucked into the next open shed to form a high quality laid-in selvedge. The shed opening limit device includes two thread-constraining prongs that extend perpendicularly to the direction of the warp threads at least along the desired laid-in depth of the selvedge. The selvedge warp threads are guided and constrained between the prongs so that the extent of shed opening of the selvedge warp threads is limited to the limited angle (&agr;1).

Abstract: A weft stretching and detecting device for a pneumatic weaving loom has a housing or mounting (6) with a weft guide channel section (8) in axial alignment with the weft insertion channel (2A) in the reed (2) of the loom and a weft stretching channel section (12) also in said housing or mounting (6). A single weft stop motion device (13) is constructed and positioned for detecting a weft insertion fault either in the guide channel section (8) or in the stretching channel section (12).

Abstract: A weft stretching and detecting device has a first section (1A) for stretching a weft thread and a second section (1B) for monitoring the arrival of a leading weft end (11A) either through a weft guide path (4, 7, 7B) which is aligned with a weft insertion channel (2A), or through a weft stretching guide channel (6, 9, 8) which is laterally displaced relative to the weft insertion direction defined by the weft insertion channel. The weft monitoring second section (1B) is mounted in a sley extension (3A) for a sliding movement axially back and forth along the sley extension (3A), whereby a spacing between the first section (1A) and the second section (1B) is adjustable. A single weft stop motion device (10) is mounted in the weft monitoring second section (1B) for monitoring the weft guide path and the weft guide channel for the arrival of a weft thread leading end through the guide path or through the guide channel.

Abstract: A thread guide formed as a guide eyelet especially for a leno disk has an entrance with an opening angle (.alpha.) and an exit with an opening angle (.beta.). The entrance and exit are interconnected by a guide bore or hole (6) surrounded by a curved bore ring surface or bead (9). The entrance and exit each have a recess (4, 5) surrounded by a respective rim portion (7, 8) of a rim surrounding the thread guide eyelet (2A, 2B). Each rim portion (7, 8) has an edge with a curved ring surface (R1 and/or R3) surrounding the respective entrance (10) and exit (11). The entrance and exit curved ring surfaces are spaced from the bore ring surface or bead (9) so that a thread passing through the thread guide has a small surface area contact with these curved ring surfaces to reduce friction while providing a positive guidance for the thread.

Abstract: A wide selvage is formed along a fabric edge in a weaving loom by at least two selvage forming heads arranged in a row with an outer selvage forming head (9) and an inner selvage forming head (8) positioned between the outer selvage forming head (9) and an edge of a fabric. The outer selvage forming head (9) seizes a weft end and transmits it to the inner selvage forming head (8) which inserts it into the shed for beat-up. Both forming heads work pneumatically and in tandem with each other. A set of two selvage forming heads (8, 9) is arranged at each fabric edge.

Abstract: The weaving of terry cloth is improved by preventing slackening of the warp threads during beat-up. The warp threads are kept in contact with a warp tensioning faller roller (8) at all times. For this purpose the faller roller (8) is eccentrically mounted and biased by a spring (46) retraction force applied through a control lever (48). The force of the spring (46) is in balance with the tension on the warp threads (4), whereby the spring (46) causes a warp length compensation during shed formation. A piston rod (52A) of a piston cylinder drive (52) acts on the control lever (48) of the faller roller (8). By pressurizing the cylinder (52), the faller roller (8) is tilted about an eccentrically mounted bearing shaft (14) and a rated pile warp thread length (54) is delivered or fed, without the pile warp threads (4) lifting away from the faller roller (8).

Abstract: A weft guide channel (6) in a reed of an air jet loom can be lengthened or shortened by telescoping sections forming one or two channel extension members (10, 18) and/or by intermediate inserts (21, 22, 23) that also have a weft guide channel portion (21A, 22A, 23A). The extension member (10) and the inserts are mounted to a mounting bracket (9) which itself is secured to the reed and/or the sley carrying the reed. At least one weft stop motion device is provided for each extension member and/or for the respective insert. One of the extension members is provided with air ducts (14, 15) for a crosswise air flow for stretching a weft thread.

Abstract: Faults in fabrics such as smooth woven fabrics or pile fabrics caused by transition operational conditions are avoided, especially on air nozzle weaving looms. Such transition operational conditions may occur when rated operating parameters must be changed, for example, due to the use of a different type of weft thread or a change in the weaving pattern and/or weave binding. For this purpose, the weft thread insertion is interrupted only during the duration of the so-called transition operational conditions. Weft insertion is interrupted by performing so-called fluidic or non-fluidic empty or mis-shots. Simultaneously, the warp let-off and the fabric take-up is controlled as a function of the number or duration of the empty or mis-shots in such a way that at this point of time during the transition operating conditions the beat-up edge of the fabric is held in a position away from the beat-up position of the reed.