Abstract: A secondary carpet backing fabric woven from man-made fiber warp and weft yarns, the warp yarns preferably being ribbon, including fibrillated, yarns, and at least some of the weft yarns having a random intermingled array of loops and filaments, weft yarns not having a random intermingled array of loops and filaments preferably being such ribbon yarns. Preferably, the secondary backing fabric has an open weave construction of leno structure. These backing fabrics having unusually strong adhesion because of the open structure of the weft yarns which have the random intermingled array of loops and filaments. Air textured core and effect yarns are especially suitable. Carpets having this secondary backing can be glued down to a floor with good adhesion.

Abstract: The invention relates to a weaving loom which is provided with a selection device allowing the programmed selection of that weft thread among a plurality of threads which has to be inserted into the weaving shed by means of an insertion device. The selection device comprises a program control device and a positioning device controlled by such program control device, which positioning device moves the weft thread carrier so that only the selected weft thread is brought to an active position ready to be inserted into the weaving shed. The selection device comprises a microcomputer provided with a microprocessor, a read-only memory, a pattern computer and a keyboard intended for programming and operating. The positioning device is provided with electromagnets controlled by program control signals of the program control device, which electromagnets control the positioning of the weft thread carriers so as to move the weft threads from the passive positions to the active positions and vice-versa.

Abstract: Device for changing the reed beating position in looms for terry fabrics, in which the feet of the followers rigid with the reed are respectively connected by connecting rods to corresponding cams keyed on a shaft rotatably supported by the machine sley in proximity to the rotational axle of said sley.A gear is keyed on to said shaft and engages with a toothed sector supported by a member idly mounted on said rotational axle of the sley and is hinged to the lower end thereof by two arms hinged together, their common joint being inserted and guided in an aperture in the form of a circular arc formed in a vertical rocker arm hinged to a fixed part of the loom at the lower end of its aperture, and kept resting on a fixed shoulder of the loom by a spring, in which position said aperture constitutes an arc of a circle having its center on said rotational axle of the sley.

Abstract: A weft guiding comb of a jet loom wherein the weft is inserted across the shed by a stream of fluid carrying medium. The comb contains relay bodies located under the lower warp threads of the shed at the reed. The reed consists of flat dents to beat up the inserted weft to the fabric, the wall of which adjacent to said lower warp threads of the shed is one part of the weft guiding comb wall. Such wall is provided with saw-toothed projections, the face surfaces of which at least in the moment of the weft insertion carry the lower warp threads of the shed, and in the faces of which, transverse to the direction of the weft insertion, there are the mouths of the relay nozzles pointing in the direction of the weft insertion.

Abstract: A rod hook device C, D is illustrated for holding and supporting a heddle rod 18 on a heddle frame 10 which includes a resilient slot B in which the rod is squeezed and held. Slot portion B is carried by a resilient neck A which flexes laterally to align a diagonal opening 40 of slot B in alignment for receiving the heddle rod. Return of neck A to an upright position squeezes rod 18 behind slanted protuberances 42 and 44 which define opening 40.

Abstract: A high torque reversible stepping actuator for valves can drive in small increments in response to fluid pressue pulses. The stepping actuator has oppositely facing ratchet wheels on a common shaft linked to the stepping actuator output. A pair of operator means can drive the ratchet wheels in opposite directions. Each operator means comprises a fluid pressure actuator connected to a drive pawl for driving one of the ratchet wheels in one direction. A pair of locking pawls normally engage the ratchet wheels preventing rotation in either direction. The fluid pressure actuator disengages one of the locking pawls sequentially before engaging the drive pawl with the ratchet wheel, thereby permitting advance of the ratchet wheel. The other locking pawl remains engaged and prevents back drive of the ratchet wheels and stepping actuator due to elastic deformation of the drive train connecting the ratchet wheel with the valve or other mechanism being driven.

Abstract: A mechanism for absorbing elongation of a wire in a power transmission device comprising two coaxial pulleys, i.e., ratchet pulley and winding pulley, winding both end portions of the wire respectively in the opposite direction; a ratchet roller connecting with the ratchet pulley by means of ratchet and engaging to the winding pulley, whereby the elongation of the wire can be absorbed by winding only one end portion of the elongated wire around either the ratchet pulley or the winding pulley.

Abstract: A weft picking device of an air jet loom, comprises a plurality of air guide members in alignment with the direction of weft picking, each air guide member being spaced predetermined distances from adjacent air guide members to define respective spaces therebetween, the air guide members being respectively formed with air guide openings to define a weft guide channel to which a weft yarn from a weft inserting nozzle is inserted, at least one auxiliary nozzle being disposed in a first section of a space between two adjacent air guide members, the space having a second section which is located opposite the first section relative to the axis of the weft guide channel, the width of the second section being less than that of the first section, thereby preventing the weft yarn from getting out of the weft guide channel to effectively accomplish weft picking.

Abstract: A forming fabric for papermaking machines is produced by weaving a conventional fabric with warp yarns extending from each of two ends. A selected number of extended warps are cut with each having an adjacent extending warp. Loops are formed with the extending warps and the ends of extending warps are rewoven through provided fills to a position near the cut warps and leaving ends of the warps projecting from the surface of the fabric. The loops are interlaced and a join pin inserted. The projecting ends are pulled to collapse the loops about the join pin.

Abstract: An apparatus for stopping and resetting a loom. The technical problem which lies at the foundation of the present invention is to provide an apparatus for stopping and resetting a loom to a certain position before a weft stroke which has given an indication of breakage. This technical problem is solved according to the present invention in that a weft fork which senses the weft, and, in the event of a predetermined breakage type in the movement of the weft during a sensing period emits a signal for stopping the loom, is arranged to prevent gripping of a new weft after the generation of a breakage signal, whereby the rapier or rapiers execute one or more strokes without a weft.

Abstract: A weft detaining device of a shuttleless loom, including a drum having a frustoconical section and a cylindrical section, a first catching member for catching the weft yarn on the drum in the vicinity of the border between the frustoconical and cylindrical sections for at least a period of weft pickings, a second catching member for catching the weft yarn on the drum for at least a period of the first time weft picking in sequential twice weft pickings and releasing its catching action to the weft yarn for at least a period of the second time weft picking of the sequential twice weft pickings, and a third catching member for catching the weft yarn on the drum cylindrical section for at least a period wherein the detaining of the weft yarn for the succeeding twice sequential weft pickings is completed, thereby enabling a so-called dual-pick pass weft insertion though the weft detaining device is of the drum type.

Abstract: To prevent the accumulation of contaminating matter in the harness of a Jacquard weaving machine, a perforated box is provided at the lower end of the harness. Air is supplied into the box so that it flows vertically upwardly along the harness members and prevents dust, fibers and other contaminating matter from settling on the harness.

Abstract: A quality monitoring system for looms is disclosed. The system includes a plurality of signal producing units disposed at various loci on the loom. These units operate to detect faults in the warp or filling yarns being woven into the fabric. Detection of such faults produce signals which are registered and accumulated in a counter. Signals provided from different sources can be weighted at different values so that a fault from one source can excite the counter to a different level than a fault from another source The accumulation of these values thus provides a quality point index indicative of the probable quality of the fabric being woven. Since a useful application of the quality point index is to assess this index or value in terms of faults in the woven fabric per unit length of loom operating time, or unit length of fabric woven, a divider circuit is provided to divide either of the aforementioned units by faults detected.

Abstract: In an air jet loom of the type wherein a weft yarn projected from a weft inserting nozzle is carried through a weft guide channel to pick the weft yarn into a shed of warp yarns by air jets from a plurality of auxiliary nozzles, weft picking is carried out by controlling the ejection of air jets from the auxiliary nozzles in a manner to simultaneously commence the air jet ejections from all the auxiliary nozzles prior to the time the weft yarn from the weft inserting nozzle reaches the auxiliary nozzle closest to the weft inserting nozzle, thereby producing a steady state air steam within the weft guide channel to stably complete a weft insertion into the shed of warp yarns.

Abstract: A weft picking device of an air jet type weaving loom including a weft inserting nozzle, a plurality of air guide members which form an air guide channel through which a weft yarn from the weft inserting nozzle is picked into the shed of warp yarns, and an auxiliary nozzle disposed between a pair of adjacent air guide members and formed with a small nozzle opening through which auxiliary air is ejected, the nozzle opening being so located that the extension of the axis thereof intersects the axis of the air guide channel at an angle lying within a plane containing the axes of the nozzle opening and the air guide channel, thereby achieving effective weft picking and overcoming the drawbacks encountered in various conventional weft picking devices.

Abstract: Mechanical device disposed behind the heddle frames of a loom for increasing the weft density in cloth weave fabrics, constituted by three parallel rollers situated horizontally at the vertices of a triangle, of which the rear roller separates the two equal sets of warp yarns while the other two front rollers are located very close together and act as an outlet guide for said two equal sets of warp yarns. The three rollers are rigid at their ends with two lateral support plates which are made to reciprocate, by means of connecting rods connected eccentrically to the loom drive shaft, about a horizontal rotational axis which lies in the center plane of the shed formed by said two sets of warp yarns, and passes in proximity to the two front thread guide rollers and at an equal distance therefrom. The three rollers are connected rigidly together by intermediate support plates.

Abstract: An apparatus for manufacturing woven slide fastener stringers comprises means for shedding a plurality of warp threads, a coiling mechanism for coiling a monofilament of synthetic resin around a mandrel in a conical orbit to form a series of coiled coupling elements and a weft inserter reciprocable across the warp shed and the conical orbit for inserting a weft thread into the warp shed, by which the coiled coupling elements can be woven into a stringer tape along a longitudinal edge thereof as the tape is woven of the warp and weft threads. The weft inserter includes an arm which when the weft thread is inserted is engageable with the monofilament to displace the latter out of the path of insertion of the weft thread so that the weft thread can be inserted smoothly without being frictionally engaged by the monofilament.

Abstract: A heddle frame stave for heddle frames includes a light metal hollow construction having, at least on one side wall, and preferably on opposing side walls, a flat groove-shaped recess. A flat steel strip is adhesively secured in the recess, the strip having a thickness of less than half the side wall thickness and covering preferably at least 60% of the surface of the side wall of the hollow stave. Vibration dampening of the heddle frame stave is thereby achieved, so that the sound produced due to vibrations and the noise development associated therewith, will be reduced considerably especially for fast running weaving machines.

Abstract: The invention relates to a weaving loom having a rotary shed forming drum, means for guiding warps around the drum to a fabric take-up mechanism, means for inserting wefts into successive sheds as the drum rotates from a warp take-on position to a fabric take-up position, weft control elements on the drum extending outwards of the drum between warps to locate inserted wefts, and a beat up mechanism including a beat up bar mounting rotatable in synchronism with the shed forming drum, a plurality of beat up bars pivotably mounted on the mounting and having beat up elements extending outwards of the beat up bars, and cam means for controlling the beat up elements to cause them to locate the wefts as the warps pass to the fabric take-up position radially outwards of the shed forming drum and to beat up the wefts and for permitting pivotting of the beat up elements contrary to the direction of rotary movement of the beat up bar mounting so as to move the beat up elements clear of the fabric after beating up.

Abstract: A mechanism for reciprocating heavy loads such as pile drivers or pumping mechanism for deep wells in which the load to be reciprocated vertically is counter-balanced through a pair of swinging arms each of which has a pair of hair-pin type torsion springs and in which the arms are joined together through a linkage and connected to the load to be reciprocated to convert the arcuate swinging movement of the arms to vertical movement of the load.