Abstract: The monitoring device for a weaving machine includes at least one camera and a weft-thread beat-up device. The weft-thread beat-up device includes at least one reed and/or a batten and the reed and/or the batten extends in a longitudinal direction of the weft-thread beat-up device. The at least one camera apparatus is fastened to the weft-thread beat-up device and includes sensor elements arranged adjacent to one another. The camera is designed to record an image using the sensor elements, wherein the sensor elements are arranged in a row that extends substantially parallel to the longitudinal direction of the weft-thread beat-up device.

Abstract: The device for detecting breakage of leno threads in leno selvedge devices on looms, the leno selvedge forming device being provided with at least two arms for guiding at least two leno threads, the leno threads being twistable together by virtue of the rotation of the arms, the device (12, 13, 14, 14a) for detecting thread breakage being provided with a facility (13, 14) for determining the natural oscillations of the arms (12) and a loom, more specifically with heald frames, with at least one leno device which is reversible in its direction of rotation and with a facility for detecting breakage of the leno threads, the device for detecting thread breakage being arranged in the front shed (V), more specifically between the leno device (10) and the heald frames (20).

Abstract: A woven cloth inspecting apparatus eliminates the influences of disturbances such as illuminating light and fly. At least two photoreceptor elements are arranged in the direction of the weft yarn of woven cloth. The photoreceptor elements detect different area of the woven cloth and they apply current signals to two respective current-to-voltage converters which convert the current signals into voltage signals which are fed to a difference calculating circuit. The difference calculating circuit calculates the difference between the values of the voltage signals received from the two current-to-voltage converters and supplies the obtained difference signal to a comparator which compares the received difference signal with a reference value preset by two reference value setting circuits. Exceeding the reference value is indicative of a defect in the warp. Alternatively the photoreceptor elements are arranged in the warp direction and detect defects in the weft.

Abstract: A separation device for a warp drawing-in machine contains a dividing-off member for dividing off the foremost dropwire of a drop-wire stack. This dividing-off member includes a separating device and a transport device. The separating device subjects to pressure one of the end edges of the dropwire to be divided off to thereby bend this dropwire outwards. The transport device is provided for entry into the gap formed as a result of the outward bending of the dropwire and for conveying the separated dropwire away from the stack. With this separation device, all types of dropwires can be individually separated easily and at a high frequency.

Abstract: A defective yarn repairing device of a warper, the defective yarn repairing device comprising a yarn detecting device for detecting a defective yarn contained in a warp; a yarn pulling device for pulling out the defective yarn from the warp; and a positioning device which has a knotter and positions the defective yarn pulling device at the position corresponding to the ascertained location of the defective yarn, wherein the positioning device causes the defective yarn pulling device to be moved in the widthwise direction of the warp; the defective yarn detecting device stops upon ascertaining the location of a defective yarn; the defective yarn pulling device pulls out the detected defective yarn from the warp; and wherein the knotter repairs the fluffy yarn.

Abstract: A method for isolating a yarn end of a broken warp thread from the warp in a weaving machine, the weaving machine being provided with a warp stop motion of the type wherein drop wires have been hung up on the warp threads for detecting that a warp thread has broken, includes the steps of first putting a yarn end of the broken warp thread in a correct position relative to the warp and subsequently removing the warp end from the warp. An apparatus for carrying out the method includes a clamp located on one side of the stop motion, a carrying element for tensioning the thread by hooking it and carrying it between the drop wires in a direction transverse to the warp direction, and a device located on a second side of the stop motion for removing the thread.

Abstract: A warp insertion monitoring method and apparatus for positively protecting woven cloth from defects due to warp insertion error or failure. A warp detector is disposed on a loom so as to have a warp presence/absence detection region located at a front or rear side and in the vicinity of a reed which serves for beating a weft inserted through a shedding formed by the upward/downward motion of healed frames against a cloth fell. The presence or absence of abnormalities in respect to the positions at which warps are inserted through the reed is identified on the basis of detection information available from the output of the warp detector. Detection timing for the warp detection information is so established as to fall within a period during which the loom is stopped, so that the presence or absence of errors in respect to the warp insertion can be detected before the loom is restarted.

Abstract: A warp mending operation control method includes the steps of: dividing a warp line in a loom into a plurality of sections each corresponding to a respective one of a plurality of warp mending devices; storing operation programs for controlling the respective warp mending devices corresponding to the plurality of sections and detecting the section where the warp line is broken; and driving the warp mending device which has been positioned in the section in which a broken warp line has been detected after reading the operation program corresponding to that section.

Abstract: A method of locating a slit between the dents of the reed of a loom corresponding to a broken warp and to an apparatus for positioning a threading device at a position corresponding to the slit between the dents corresponding to the broken warp. The broken warp or a normal warp in a specific vertically displaced relation with the broken warp is detected by a yarn sensor. The position of a slit between the dents corresponding to the broken warp or that of the normal warp is determined on the basis of the distance traveled by the yarn sensor from its standby position, and a threading device is position corresponding to the slit between the dents corresponding to the broken warp on the basis of the distance traveled by the yarn sensor.

Abstract: A carriage which is movable into a position over a loom carries a manipulator for drawing a replacement yarn through a reed. A tracing element moves across the width of the warp yarns at a point downstream of the reed to detect a gap in the warp yarns corresponding to the position of a broken yarn. The manipulator moves into alignment with the gap and a guide on the manipulator pivots through the reed to receive an end of the replacement warp yarn. Return pivoting of the guide pulls the replacement warp yarn through the reed and a yarn clamp is activated to faciliatate tieing in of the warp yarn during subsequent operation of the loom.

Abstract: AN apparatus individually separates a plurality of dropper bars which are suspended from a dropper supporting rod. A nozzle first blows the dropper bars along the dropper supporting rod to a position at which the dropper bars are to be separated. A lifting device lifts the lower end of a forwardmost dropper bar which is to be separated from the remaining dropper bars, and advances the forwardmost dropper bar along the dropper supporting rod. A slicer than moves the lower end of the dropper bar, lifted and advanced by the lifting device, in the direction of the width of the dropper bar. A separating device receives the dropper bar from the slicer and attracts and holds the lower end of the dropper bar with a magnet. The separating device then separates the received dropper bar from the remaining dropper bars. A shutter mechanism operates in an interlocking relation with the separating device to release the upper ends of the dropper bars one by one.

Abstract: The device for repairing a yarn break includes a folder blade which is to be inserted between the warp yarns adjacent a broken yarn. During horizontal motion, the folder blade has two wings which diverge outwardly for spreading out the warp yarn. The folder blade also has a longitudinal groove to receive a heddle in the narrowest place between the wings. A sensor on one wing first determines the position of the heddle in the warp direction and generates a signal so that the folder blade comes to a stop with the heddle in the groove of the blade. A separate warp yarn can then be threaded into the heddle by drawing-in tubes.

Abstract: An apparatus for repairing a yarn break includes a housing which is first positioned roughly by being guided towards the stop motion wire belonging to the broken warp yarn. After the broken warp yarn has been removed, a fresh separate warp yarn is introduced into the stop wire and a heddle by a pair of laterally slotted threading in tubes. In the process, the fresh warp yarn travels from a blowing opening of one tube into a suction opening in the other tube while passing through an opening in the respective stop motion wire or heddle. During this operation, the tubes are moved stepwise in the warp direction of the weaving machine until reaching a guide inserted through the reed and into which the fresh warp yarn is finally threaded.

Abstract: An apparatus automatically repairing broken warp threads in weaving machines or looms. The apparatus comprises a computerized control system having a memory storing predetermined characteristics for drawing-in of a harness and reeding each one of a plurality of weaving machines. The control system receives information on a row of drop wires which has brought about a stoppage in one of the weaving machines. A detecting device is controlled by the control system, which detecting device determines a numerical position of the fallen drop wire in a row of drop wires which contains the fallen drop wire, and sends information of this position to the computerized control system. A moving reed space counting device also controlled by the control system moves along the reed of the weaving machine and stops directly opposite the reed space at the location of a broken end corresponding to the fallen drop wire, responsive to information received as to the position of the fallen drop wire by the control system.

Abstract: A device for removing a broken warp thread from a warp stop motion includes a plurality of extraction elements that may include nozzles, hooks, grippers and the like that lift a slack loop of broken warp thread at a fallen drop wire associated with the broken warp thread and move the loop to a position outside the stop motion by passing the loop sequentially from one nozzle, etc. to the next in a single direction until the loop is outside the stop motion, where it can be gripped by a thread holder for further manipulation.

Abstract: One of the bars of a contact bar, preferably the inner bar (12) has an electrical resistance which increases linearly along its entire length and which can be scanned as measurable value at any desired point along said bar. A preferable embodiment for this purpose is a metallic conductive spiral (11) which is wound onto a body of insulating material (10). An inner bar (12) configured in such a manner is held in an outer bar (13), the upper part of which is of U-shaped cross section, whereby a layer of insulating material (14) separates said inner bar from said outer bar of U-shaped cross section. The metallic conductive spiral (11) has, compared to a solid bar, a substantially higher electrical resistance which is suited for the purpose of method of measurements according to the principle of the electrical resistance bridge in order to localize a dropped drop wire on the contact bar in the event of a warp end breakage.

Abstract: A process for manipulating fallen warp thread detector drop wires and revealing their location includes gripping and rotating a fallen wire, while spreading adjacent wires of the pack apart by a spreader and raising the fallen wire above the pack. Apparatus for gripping, rotating, spreading and lifting is disclosed.