Abstract: A method of preparing a polyester fabric for an airbag is provided, and particularly, a method of preparing a fabric for an airbag by inserting a predetermined weave into a selvage to provide the whole fabric with uniform tension upon weaving a high-density fabric for an airbag using a polyester yarn is provided.

Abstract: A method for manufacturing a one-piece woven air bag includes weaving yarns into a one-piece woven fabric air bag structure having single layer portions and two layer portions in which an inflatable volume is defined between the two layer portions and in which the single layer portions are non-inflatable portions that help define the shape and configuration of the inflatable volume. The step of weaving yarns is performed using a water-jet loom.

Abstract: A method and means are disclosed for measured control of tape-like warps for shedding and taking-up operations when producing woven materials comprising tape-like warps and wefts. According to this invention, a displaceable contact surface of the warp control device is located between the warp supply source and the shedding device. The warp control device comprises a displaceable member for providing contact surface to displace at least some of the tape-like warps for releasing them in a measured way for shed forming and taking-up operations. Further, the contact surfaces are retracted for enabling shed closing and measured taking-up.

Abstract: A control technique is capable of adjusting a weight of a pile fabric by adjusting consumption of a pile warp at a proper range with a more simplified system. In a pile loom, a tolerance relative to a value associated with consumption of the pile warp is set, and the value associated with consumption of the pile warp is measured during a pile weaving period. If the value associated with consumption of the pile warp exceeds the tolerance, the weaving condition parameter associated with the weight of the pile is corrected in a direction to approach a target value of the weight of a pile fabric.

Abstract: This method of driving a loom is characterized by setting, prior to starting works to the devices of the loom, stop position information relative to the devices of a drive actuator for driving the devices, and by driving the drive actuator according to instructions for works and stopping the drive actuator on the basis of the stop position information.

Abstract: The let-off warp beam coupling device has a let-off warp beam rotatably and detachably mounted on a specified position of a weaving machine and a beam gear provided on the weaving machine so as to be opposite to a shaft end of a beam shaft of the let-off warp beam for rotating the let-off warp beam. A driven coupling member is provided so as to be secured at the shaft end of the beam shaft of the let-off warp beam, and has a plurality of projections provided on a circle positioned on a plane perpendicular to the axial direction of the beam shaft. Each projection projects in the axial direction of the beam shaft and has a side face tapered in the axial direction. A driving coupling member is also provided on the beam gear side so as to be opposite to the driven coupling member with a specified spacing therebetween. It has a plurality of projections provided on a circle positioned on a plane perpendicular to the axial direction of the beam shaft.

Abstract: A method for producing a fabric, by a loom equipped with healds, a reed and a back roller, characterized by using synthetic filament yarns as the warp yarns and the weft yarns to be supplied to the loom, using a drive system having a cam for the shedding and closing motions of the healds, and keeping the dwell angle of the healds in a range from 85 to 120 degrees. The back roller is equipped with a positive easing mechanism, and the easing quantity by the easing mechanism is adjusted in a range from about 5 to about 15 mm. Where the warp yarns positioned in the selvages of the fabric among the warp yarns are called selvage yarns and the warp yarns additionally added to the selvage yarns are called insert yarns, then the number of insert yarns per 10 selvage yarns is in a range of from 1 to 10, and one selvage yarn each and one insert yarn each are guided through each dent of the reed.

Abstract: A weaving machine comprises an arrangement for adjusting or optimizing the consumption of warp thread. The weaving machine permits weaving of different widths for the woven material. First bobbins can be arranged next to one another, with synchronized rotation, on a warp beam (Vb) of the weaving machine in order to effect a warp thread supply which represents a minimum width for the woven material. Second bobbins can be arranged, individually from the point of view of rotation, in bobbin boards in order to effect a warp thread supply which represents widths between the minimum width and a maximum width for the woven material. The second bobbins are provided with, or can cooperate with, activatable and deactivatable brake members by which the number of second bobbins (2') corresponding to the set weaving width can be engaged for warp thread supply in the weaving machine.

Abstract: A method of controlling the easing motion (1) of a loom executes a position control operation and a tension control operation successively in one weaving cycle of the loom. The position of an easing roller (6) included in the easing motion (1) is measured in a position control period, a correction is determined according to the deviation of the measured position of the easing roller (6) from a desired roller position, and a controlled variable is corrected by using the correction to make the actual position of the easing roller (6) approach the desired roller position.

Abstract: A warp beam coupling for weaving looms is used for the detachable connection and for the transmission of a rotating movement between a warp beam drive and a warp beam tube. The warp beam coupling includes a bearing bell which is driven in a rotating manner by a warp beam drive and is disposed in a warp beam bearing which has a coupling flange which can be connected with a coupling flange provided on the warp beam tube of a warp beam. In order to achieve a playfree and highly loadable connection between the warp beam drive and the warp beam, the coupling flanges are each provided with a serration, and the bearing bell has devices for its axial displacement so that the serrations can be engaged and disengaged. The bearing bell and thus the coupling flange are braced by way of tensioning devices.

Abstract: A process and apparatus for weaving a fabric with a three dimensional bulging zone, which is formed by increasing the density of the crossing points of the warp and weft threads so as to naturally impart a bulging zone in the fabric. The density is changed by changing the number of threads and/or changing the weave pattern. The lengths of the warp threads can also be increased in the bulging zone. In a preferred embodiment, the threads include a material which is settable by thermal or chemical treatment, and such that upon being set a three dimensional rigid matrix is formed which includes the non-settable threads as a reinforcement. The apparatus for carrying out the process takes the form of a loom having the capability of individually drawing off selected lengths of the warp threads from a warp supply, and a jacquard head for forming the weaving sheds and which has a control for changing the number of threads woven and/or the weave pattern.

Abstract: A method for forming an airbag fabric for use in protecting vehicle occupants during a collision. The airbag fabric includes at least a portion of fabric woven by water-jet weaving yarns without chemical sizing compounds thereon at weave constructions comparable to those available by traditional Rapier weaving processes.

Abstract: An arrangement for driving a warp beam employs a stepless adjustable drive (7) whose coupling element (8) is displaced by a setting member (11). The setting member (11) is controlled-by a computer (10) which provides an input arrangement (17) for the take-up of data of a predetermined thread provision (F); as well as data on the machine, the stepless adjustable drive (7) and the beam (3). The data includes a wind variable size (actual wind number w.sub.a), and data characterizing the actual wind circumference (U.sub.a). The computer has a calculating segment (18) and an output (19). With such an arrangement, the coupling element (8) can be brought into the correct target position, even before the start of the machine. The computing means can also serve as part of the control arrangement during the running of the machine.

Abstract: A method for weaving airbag fabric for use in protecting vehicle occupants during a collision. The airbag fabric includes at least a portion of fabric woven with unsized warp and fill yarns by water-jet weaving at a weave construction of at least 47 warp and fill threads per inch comparable to that available by traditional Rapier weaving machines.

Abstract: A weaving machine for weaving fabric, felts and wires of different widths, comprises a warp thread magazine, first members for feeding warp threads into the weaving machine, and second members for executing the weaving functions in the weaving machine. The warp thread magazine includes a number of warp thread-bearing bobbins which are mounted individually alongside one another and individually selectable so as to form warp thread widths which correspond essentially to the widths of the various fabrics which can be woven in the weaving machine. The first members for feeding the warp threads include feed-in rollers each made up of individually rotatable sections which are arranged alongside one another and cooperate with associated warp thread-bearing bobbins, wherein the feeding-in of the warp threads from selected bobbins can be effected by rotating those sections of the feed-in rollers which cooperate with the selected bobbins.

Abstract: In order to prevent the formation of weft streaks in cloth when a loom is restarted after a stoppage, the warp tension is reduced by a predetermined amount as soon as the stoppage occurs and the original warp tension is restored before restarting. The reduction in the warp tension prevents the tensile failure, that is, the plastic extension of the warp yarn, and ensures the exact repositioning of the beating-up line of the weft upon restarting.

Abstract: In a control for a warp beam drive of a weaving machine, the warp beam drive is regulated at all times by a control which receives input signals representing the number of rotations of the warp beam and representing the tension of the warp threads. If the weaving machine has come to a standstill because of an error which has taken place, then, before the warp beam drive is re-started, the tension on the warp threads is increased to a specific value by rotating the warp beam in reverse, in order, during re-start, to take warp thread tension back to a predetermined normal value again through suitable action on the warp beam drive. The effect of this is that no stop marks or start marks are formed in the woven material as a result of the weaving machine having stood still.

Abstract: The invention provides a novel loom and method for weaving fabrics in which at least the weft comprises stiff strands for example in the form of tapes or bands. The weft strand (41) is frictionally gripped at one side of the warp array (40) and intermittently pushed through the shed to insert successive lengths of weft. In a preferred modification, a hollow guide (22) is advanced through the shed in the opposite direction to the pushing of the weft strand, the free or previously severed end of the strand is pushed into the hollow guide, for example by friction wheel drive (3),(31) mounted on sley (13), and the guide is retracted in the same direction and at the same time as the strand is pushed through the shed, such that the free end of the weft is inside the guide while it passes through the shed.

Abstract: A warp let-off mechanism of a weaving machine has a speed change transmission whose output rotation is in one direction irrespective of whether its input rotation is in the forward or reverse direction. The speed change transmission has shift means for selectively changing the direction of the output rotation between the forward and reverse directions. The speed change transmission can change the ratio between the input speed and output speed in accordance with warp tension sensed by warp tension sensing means. There is further provided interlock means connected between the shift means of the speed change transmission and an operating lever or other operating device of the weaving machine. The interlock means moves the shift means in accordance with the movement of the operating lever so as to match the direction of the warp beam rotation to the operation of the weaving machine.

Abstract: A weaving machine has a first drive means which has a speed change transmission and drives a warp beam during normal weaving operation, and a second drive means for driving the warp beam independently of the first drive means when the weaving machine is moved by inching or by hand during downtime operation. A first sensor senses the weaving cycle of the weaving machine, and a second sensor senses the warp beam rotation. A warp beam rotation control system determines the angular displacement of the warp beam per weaving cycle during normal weaving operation, and controls the warp beam rotation during downtime operation in accordance with the determined angular displacement per weaving cycle.

Abstract: A friction brake band is provided for embracing a loom warp beam head with the ends of the band in spaced relation. One of the band ends includes a roller journaled for rotation about an axis extending transversely of the band end and an elongated anchor cable has one end attached to the other band end, its midportion passed about the roller and its other end stationarily anchored. A flexible tensioner strap is disposed over the brake band and has one end thereof anchored to the aforementioned one end of the band. The other end of the tension strap extends from the side of the head or drum remote from the cable and in a direction generally paralleling the anchored end of the cable and has a variable weight structure operably connected thereto.

Abstract: A loom including a drive device for weaving fabric from warp yarn extending from a source over a back rest provided adjacent one end of the loom and after being woven into fabric being fed over a breast beam positioned adjacent the other end of the loom. A driven roll over which the warp is guided without slippage is disposed in front of the back rest and at least one driven delivery roller over which the woven goods is guided without slippage is disposed after the breast beam. The guide roller and the delivery roller are driven in synchronism and there is a driving connection therebetween, as well as with the main drive shaft of the loom.