Abstract: A weaving loom produces a fabric (F), with warp yarns and in-woven weft yarns. The weaving loom includes a warp delivery unit, heddles to form a shed, a shedding mechanism for moving each heddle vertically along a vertical path, a weft insertion means for inserting each weft yarn in a shed and for releasing each weft yarn at a given location along a weft axis, and a weft delivery means for delivering each weft yarn to the weft insertion means. The weaving loom also includes a programmable clamping means for picking up a first end of each weft yarn and for releasing each weft yarn at any predetermined position along the weft axis, and a programmable mechanism including actuators for semi-closing the shed around the inserted weft yarn at any predetermined position along the weft axis.

Abstract: A method for weaving a fabric (F), with warp yarns (412, 414, 422, 424) and inwoven weft yarns (61, 62, W1-W5), on a loom (2) which comprises a warp delivery unit (8); heddles (14) for moving warp yarns in order to form a shed; a mechanism (12) for moving (F1) each heddle vertically along a vertical path; weft insertion means (21, 22) for inserting each weft yarn in a shed (S1, S2) and for releasing the weft yarn at a given location along a weft axis (Y1, Y2); and weft delivery means (28) for delivering weft yarns (61, 62, W1-W5) to the weft insertion means, this method comprising, for at least two consecutive picks, at least the following steps consisting in a) opening the shed (S1, S2); b) picking, by the weft insertion means (21, 22), of a first end (612, 622) of a weft yarn (61, 62, W1-W5) presented by the weft delivery means (28); c) drawing (A3) the weft yarn into the shed, along the weft axis (Y1, Y2); d) releasing the weft yarn at the predetermined position along the weft axis; e) withdrawing the inse

Abstract: The thread processing device (8) of a textile machine has at least one thread guiding device that moves a thread (4) back and forth between at least two positions (12, 14) by means of a thread guiding member (30, 32, 34). The thread guiding member may be moved in one direction by means of an interlocking drive (28) and in the opposite direction by a frictional engagement drive (36) that acts against the interlocking drive (28). The textile machine is substantially improved by designing the frictional engagement drive (36) as a pneumatic drive with an individual gas chamber (64) that contains a gas volume that may be compressed by the interlocking drive at the working frequency. The gas chamber communicates with a compressed gas source through a non-return valve.

Abstract: A manual loom can be complemented by a device which makes possible computer-controlled weaving even in such simple looms. The device comprises a PC, a printed board control and a module block having air cylinders with appurtenant pistons which bear the weighted lifting rods for the warp threads.

Abstract: An arrangement comprises heald frames, linear drives and coupling apparatus that are collected together in groups. The linear drives of each group are arranged in a staggered fashion and form a drive unit. The coupling apparatus are executed in such a manner that the staggering within a group can be selected. With this arrangement an ideal ratio of drive power to required space is achieved. In addition, the elements forming a group are interchangeable.

Abstract: A shedding device for looms includes healds each having a first end and a second end; and a piston-cylinder system for guiding warps in the healds by moving the healds between a top shed position and a lower shed position. The piston cylinder system includes: pistons each being connected at one end thereof to the second end of a corresponding one of the healds; and cylinders, each piston being reciprocatingly disposed in a corresponding one of the cylinders. The device further includes a system block, the cylinders defining bores in the system block; a guide block defining guide bores therein, the first end of each of the healds being guided in the guide bores of the guide block; a regulating pressure arrangement for actuating the pistons within the cylinders alternatingly between the top shed position and the lower shed position, the regulating arrangement including an arrangement for producing a return force on the pistons thereby bringing respective ones of the healds to their lower shed position.

Abstract: A method and apparatus utilizing an elongate, flexible member operatively attached to rods that move up and down, on a Jacquard loom. A latch control mechanism is provided for latching said elongate, flexible member in a fixed position by applying pressure thereto by vacuum or pressure. This latching of the rod in an upper position creates a shed whereby filling yarns can be passed through to create Jacquard fabric. The pressure can be applied against the elongate, flexible member by filling sealed elongate, elastomeric member with pressured gas. In addition, the pressure can be applied against the elongate, flexible member by activating a dimensionally alterable, electric element that presses against the elongate, flexible member.

Abstract: A shedding system having a plurality of heddles supported by and connected to top ends of piston rods of pneumatic cylinders. The heddle employed by the shedding system is elongated in one direction, and has an arcuate portion which forms an arc about a line running in the elongated direction of the heddle. A method of joining a fabric by a woven seam uses the above-mentioned system to form the shed in an array of the threads of an interweaving piece.

Abstract: A shedding apparatus for being fitted onto a fabric-forming machine such as a loom for controlling the up and down movement of warp-carrying heddles to form a filling insertion zone. The shedding apparatus includes a computer for storing pattern information relating to a pre-determined pattern to be translated into a woven pattern on the fabric-forming machine. A plurality of pneumatic piston and cylinder assemblies are attached to respective heddles for pneumatically moving the heddle attached thereto into and out of shed-forming position. Pressurized air is delivered to predetermined piston and cylinder assemblies to thereby move the selected piston and cylinder assemblies and their respective heddles into upper and lower shed-forming positions to receive a filling yarn to thereby create a portion of the pattern.

Abstract: A shedding device and a method for joining the ends of a fabric into an endless belt of fabric, or, alternatively, joining the ends of separate pieces of fabric into a single piece of fabric. The shedding device employs a plurality of heddles supported at only one end, allowing the heddles to be individually moved or adjusted. The heddles are connected to the top ends of piston rods of a plurality of pneumatic cylinders. The heddles move up and down to shift threads passing through the heddles, so as to form a shed. The shedding method employs an interweaving piece of fabric, with a portion of the interweaving piece having only weft threads. The weft thread of the interweaving piece interwoven with the warp threads of the ends of the fabric to be joined. Alternatively, the weft threads of the interweaving piece can be interwoven with the weft threads of the ends of the fabric to be joined.

Abstract: A pulley-block drive of an open shed Jacquard mechanism is sectionally controlled by a movable suspension apparatus. Pulley bands or harness cords are attached to one of the ends of the movable suspension apparatus. The movable suspension apparatus is suspended from hooks which can engage with the knives of the jacquard machine so that the movable suspension apparatus is driven by the knife grid of the jacquard mechanism.

Abstract: Apparatus for the individual control of the raising and lowering movement of warp yarns on a fabric weaving loom, in which the warp yarns are passed through guide eyes, these eyes being mounted on the piston rods of fluid pressure operated piston and cylinder jacks. There are a large number of jacks, these being grouped in a plurality of units which are removable and are juxtaposable with respect to number and position in accordance with the desired density of warp threads, the units being arranged in at least two tiers. This gives great flexibility of control.

Abstract: A plurality of generally parallel, side-by-side warp tows of carbonaceous precursor material are interwoven with fill yarns forming a fabric of low density cross weave to facilitate handling of the warp tows for oxidation, carbonization and other processing thereof. A different fill yarn is interwoven with the warp tows from each of the opposite edges of the fabric so as to form a succession of generally V-shaped loops in each warp yarn with the loops of the two different warp yarns being staggered along the length of the fabric. Each loop of warp yarn is comprised of a pair of lengths of warp yarn which enter the fabric from spaced-apart locations along an edge of the fabric and undulate under and over the warp tows in a like sense which is opposite the sense of the undulations of the immediately adjacent loops prior to joining at a point across part but not all of the width of the fabric.

Abstract: A loom in which each warp yarn passes through a retraction region and a shedding region, and in which means are provided for creating gaseous fluid flow along each warp yarn so that the yarns, or those that are not otherwise restrained, are moved to form a loop in the shedding region, the loops, or selected ones of them, being separated from the warp yarn sheet by gaseous fluid flow to form a shed, and means are provided for mechanically displacing portions of the yarns in the retraction region to move the yarns longitudinally into a path of predetermined length so as to draw the yarns into tension in the shedding region to close the shed. The means for drawing the yarns into tension may also be employed to draw the fell of the woven fabric against a fixed reed to beat up the inserted weft yarn.

Abstract: This relates to a device for exerting a back-pull on the heddles of Jacquard looms. In such looms the upper end of each heddle is connected to a patterning machine and it is necessary that the lower end of the heddle be connected to a pulling device which applies the necessary pull in the opposite direction to return the displaced heddle. Each heddle has permanently connected thereto a piston which is positioned within a cylinder guide with one end of the cylinder guide being open into a chamber wherein a pressure other than atmospheric pressure is maintained and the opposite end of the cylinder guide is open to the atmosphere in a manner wherein each piston and its associated heddle is displaced away from the patterning machine. The pull-back pressure may be varied by varying the pressure within the chamber.