Abstract: The arrangement contains a carrier (4) which is mounted in a drive shaft (1) which is formed as a hollow shaft with holes (10) which are arranged in a radial plane, two switching tappets (5) which are displaceably arranged in the holes, two control members (7) which can be brought into operative engagement with the switching tappets, means (8) for the actuation of the control members and two resetting elements (9) for the control members (7). The control members are displaceable in the carrier with respect to the drive shaft into a first position in order to switch the coupling apparatus into a drive position and into a second position in order to switch the coupling apparatus into an idling position. The resetting members (9) are arranged inside the drive shaft (1) in order to displace the control members (7) into the second position. With this arrangement the resetting of the control members is ensured.

Abstract: An arrangement for the holding of a weft thread for a series shed weaving machine has a holder apparatus (11) for the weft thread (4). Two forwarding elements (12, 13) are arranged at both sides of the holder apparatus and are movable relative to the holder apparatus in order to introduce the weft thread. The weft thread (4) extends transversely to the holder apparatus and transversely to the holder apparatus and transversely to the direction of movement of the forwarding elements, into the holder apparatus and furthermore, an apparatus (14) in order to catch and to tension the weft thread. The holder apparatus comprises a thread clamp (15) with a stationary clamping part (17) and a movable clamping part (18) which is under spring action and which forms a clamping gap (27). The weft thread is held in a stretch state by the forwarding elements (12, 13) and the apparatus (14) and is displaceable transversely through the clamping gap.

Abstract: In the method a weft thread which is supplied via a thread brake and a thread presenter is inserted into a shed by means of rapiers with a thread clamp, with the thread clamp being set in a freely selectable manner for each weft insertion during the weft insertion. This makes it possible to insert weft yarns of different types and thickness into a shed. The system comprises a rapier (1) with a thread clamp (4) and an arrangement (4) with a first apparatus (11) for setting the thread clamp and with a second apparatus (21) for the actuation of the first apparatus.

Abstract: An apparatus for applying substantially uniform tension to warp threads along a warp thread path in a weaving machine. The apparatus has a carrier element (5), a tensioner element (7) for the warp threads which is multiply supported thereon, said tensioner element being pivotal about the axis of the carrier element, and a drive apparatus (8) which is connected drivewise to the carrier element. The drive apparatus (8) consists of a motor (9) and a kinematic chain which is connected to the carrier element (5) in such a manner that the introduction of the forces into the carrier element takes place substantially symmetrically with respect to its longitudinal extent.

Abstract: A control curve is calculated for controlling the yarn tension including warp and weft yarn tensions in a weaving loom by comparing a previously determined yarn tension curve with a desired value for the yarn tension curve. The control characteristic is optimized by continuous iteration. A further optimization of the yarn tension curve takes place by taking account of variable parameters in the yarn tension curve, for example yarn breakage analysis, beat-up force of the reed, and/or shed change. The control device for performing the method can be implemented with conventional logic. The method automatically carries out in an advantageous manner for weft and warp yarns a matching to the optimum yarn tension as a function of time on the basis of preselected parameter values.

Abstract: A weaving machine having a rotating main shaft for driving the weaving machine, with a plurality of accessories on the weaving machine for weaving cloth is provided with an artificial signal of shaft position. A generator generates the artificial signal representing the desired angular position of the main driving shaft of the weaving machine. This generator generates the signal independent of actual angular position of the main shaft. A drive drives the main shaft of the weaving machine. The drive is responsive to the signal for the desired angular position of the main shaft. This drive responds independently of the actual angular position of the main shaft of the weaving machine. At least one weaving machine accessory is present for performing functions on the cloth being woven, such as a thread tensioning device, cloth takeoff device, or nozzle controls, for projectile-type weft insertion. These accessories also receive the artificial signal of desired shaft position, and function responsive to the signal.

Abstract: A device for coupling and uncoupling heald shafts (1) to shaft rods (2) in a loom comprises first and second coupling portions (6, 7) attached to shafts (1) and shaft rods (2), respectively, and a latch member (8) for latching the coupling portions to each other. A pivotable actuating member (14) is pivotably coupled to the shaft drive to move the coupling portions between a rest position, where the shaft rods are uncoupled to the shafts, and a working position, where the shaft rods are coupled to the shafts for operation of the device. A support member (15) is coupled to the shaft drive and comprises a plurality of elongate holes (17) for receiving and guiding the shaft rods during operation of the loom and V-shaped notches (19) aligned with each of the elongate holes to secure the shaft rods in a stable position when the rods are uncoupled to the shafts. The shaft rods are designed so that the ratio of the length of each rod to the maximum stroke height, i.e.

Abstract: In the combination of a carriage for the preparation and storage of fabric to be changed on a loom, a loom for receiving the fabric to be changed, and an insertion vehicle for changing the fabric at the loom, improvements in the method of fabric change as well as the associated carriage and insertion vehicle are set forth. The method allows the carriage for the preparation and storage of fabric to be changed to have the working distance between the warp stop motion and the loom to be adjusted dependent upon shed size, density of fabric and warp material. The carriage for the preparation and storage of fabric includes a warp clamp and adjustment for spacing the warp stop motion with respect to the loom harness and heald frames. The insertion vehicle includes a centering mechanism for placing the loom harness and heald frames to the loom.

Abstract: By the use of two picks without weft yarn (5, 6) during the pile change for three-weft pile fabrics, the same tying off is achieved as in a pile change for four-weft pile fabric. A three-weft terry cloth consequently has a fabric appearance which resembles the fabric appearance of a four-weft terry cloth.

Abstract: A gripper projectile for a loom includes a housing (1) made as a hollow body, a weft yarn clamp (2) which is arranged to fit into the housing and at least one connector element (4) which connects the housing (1) and the weft yarn clamp (2) together. The weft yarn clamp consists of a pair of clamp arms (5) prestressed with springy elasticity and a yoke (6) which connects the pair of clamp arms. An insert body (3) of elastic material is inserted between the clamp arms (5). The insert body (3) exhibits a sawtooth like profiling which is formed at its edge faces in such a way that the individual portions (12) of the profile rest with deformation against the insides of the clamp arms (5). The insert body can also be formed with rows of perforations which further enable its edges to deform against the insides of the clamp arms. The perforations can extend across or be parallel to the length of the clamp arms.

Abstract: An arrangement for releasably fastening an elongate first member (1), such as a heald rod in a loom, within a second member (2), such as a coupling element between the heald rod and a shaft drive. The second member includes a first recess (4a) forming a cavity (4) and a second recess (4b) for receiving the first member. A fastener (3) is threadably coupled to the second member within a third recess (4c). The fastener engages the first member at a bearing point (5) within the cavity to fix the first and second members together. This engagement bends the first member within the cavity so that relative movement between the two members is reduced or eliminated.

Abstract: A device for coupling two outer parts (3) to a third part (2) disposed therebetween. The device includes a plurality of fasteners 7 each threadably mounted to an opening (9) in one of the outer parts and a cylindrical recess (6a) in the third part. Each fastener 7 has a conical head 7a that rests against the opening in the outer part. The outer parts project over the cylindrical recess so that an annular cavity is formed between the head of the fastener and the third part. Thus, the head of the fastener elastically deforms the outer part into the annular cavity so that additional forces may be transmitted from the outer part to the third part. In addition, the inner surface of each outer part is parallel to the third part so that the third part may be replaced without any effective movement of the outer parts.

Abstract: The weft thread storage device contains a winding drum arranged eccentrically to a stationary axis. The winding drum is provided with a plurality of thread support rods on the side thereof which is opposite to the eccentric portion thereof. The thread support rods rotate conjointly with the winding drum. The winding reel composed of the winding drum and thread support rods carries the weft thread coils or wrappings. An end face of this winding reel supports a thread guide disk mounted on an intermediate support disk. The thread guide disk is constructed such that the outer circumference thereof everywhere exhibits the same distance from a balloon-breaker housing. In one upper portion of the thread storage device this distance is defined by the upper portion of the winding drum.

Abstract: In the filling-thread insertion element or delivery gripper, a transport clamping tongue supports an upper supplementary clamping tongue which is provided with a slot. The upper supplementary clamping tongue is appreciably thinner than the transport clamping tongue. The upper supplementary clamping tongue can therefore lie elastically against a clamping location between the transport clamping and upper supplementary clamping tongues on the one hand and a clamping jaw on the other hand. Furthermore, the upper supplementary clamping tongue is adjustable by means of a screw, which enables its clamping force to be adapted to the filling or weft thread currently employed, respectively to its thickness. It is in this manner possible to perform double-pick or weft insertion with secure clamping of two filling or weft threads in a weft thread entry slot.

Abstract: The weaving machine includes an electronic control device which can receive a signal for a reverse-motion of the pile warp let-off drive motor from the card dobby via a sensor when borders (plain woven regions) of the fabric are to be produced within the terrycloth material. When the drive motor briefly runs backward, the tension in the pile warp increases, which causes the plate warp tensioning beam to be shifted into the plain weaving position in which a pivoting lever rides up onto a leaf spring. The latter is shifted into the plain weaving position which causes the increased pile warp tension to be produced. If a terrycloth weaving operation is to be returned to, then the drive motor receives an appropriate signal from the card dobby for a brief fast forward motion of the pile warp beam, which causes a lower pile warp tension to be produced again while the pile warp tensioning beam pivots back into the normal position.

Abstract: A blower nozzle is provided on the shot or weft insertion side of the weaving machine for blowing the severed end of the weft thread into an eyelet of a selvedge-tucking needle. By transferring the weft thread end by means of the blower nozzle, a particularly short time within the operating cycle of the weaving machine is required for the procedure of transferring the weft thread end to the selvedge-tucking needle. This permits higher operating speeds of the weaving machine.

Abstract: A retention nozzle is provided at the catch side of the weaving machine for clamping or retaining the weft thread end during severance of the weft thread by means of a shear. A transfer nozzle is also provided at the catch side. When the weft thread lies over the transfer nozzle after being severed, the transfer nozzle is supplied with blower air and subsequently the supply of blower air to the retention nozzle is interrupted. In this manner the weft thread end is withdrawn from a catch channel of the retention nozzle and blown into a catch channel of the transfer nozzle. During this operation, the weft thread end is conducted through an eyelet of a selvedge-laying needle and thereby transferred to the latter. The retention nozzle permits severance of the weft thread by means of the shear even before the weft thread is in alignment with the eyelet of the selvedge-laying needle and the transfer nozzle.

Abstract: The apparatus comprises an injector nozzle, for instance on the loom take-up roll. The injector nozzle has a plurality of air supply passages or channels opening into an extraction conduit surrounding the selvedge to be removed or extracted. The selvedge is pulled through the injector nozzle by the air coming out of the air supply passages and conducted through a tube or hose into a waste container. The injector nozzle for extracting cut-off fabric parts is especially suited for sensitive materials, e.g. glass fiber yarns. When for instance the selvedge contains severed weft thread ends of glass fiber material, the latter are particularly well protected against breakage due to the extracting injector nozzle.

Abstract: The control device contains a deflection roll extending over the entire weaving width of the weaving machine, a tensioning beam pivotable about a support beam and also extending over the entire weaving width as well as a sensing roller arranged therebetween and subject to the action of a spring for sensing a portion of the warp threads of the warp, respectively of each partial warp beam. The tensioning beam is subject to the action of a preloaded torsion-bar spring. In this manner a sensing force arises at the sensing roller which can be increased from a first value to a second value according to the position of the tensioning beam. This permits the realization of increased responsiveness of the control device.

Abstract: Guide members with bifurcated forked ends are fastened to the cleaning apparatus, by means of which this cleaning apparatus can be mounted upon the reed. An endless belt is seated in the cleaning device and rotating cleaning brushes are contained in such cleaning apparatus. In this way, the cleaning apparatus can be slowly moved forward on the reed by means of at least one compressed air motor. By so doing, the reed wires or lamellae or the dents between them can be freed of dirt or other contaminants. The cleaning can take place without removing the reed from the weaving machine.