Picanol, N.v.

Picanol N.v. Naamloze Vennootschap

Dirk Gryson

Henry Shaw

Michel M Vandeweghe

Bernard Vancayzeele

Stefan Dewaele

Joos Waelkens

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.

Isolating a yarn end of a broken warp thread from the warp in a weaving

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.

Apparatus for separating a broken warp thread at the loom warp stop

A method for monitoring warp thread breaks on weaving machines includes the steps of locating broken warp threads and storing the number of broken warp threads in a memory as a function of the postions of the breaks.

Method for monitoring warp breaks on weaving machines, and a device

A method and apparatus for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine in which the warp stop motion includes several rows of drop wires, the method including the step of extracting a loop in the broken warp thread caused by a sag as a result of the corresponding drop wire falling away from the fallen drop wire. The apparatus includes a series of suction or blower nozzles or grippers which are sequentially activated to pass the loop between the adjacent nozzles or grippers toward the side of the warp sheet.

Method for separating a broken warp thread at the warp stop motion from

A measuring and detecting device for determining the position of a break in a warp thread on a weaving machine. The machine makes possible a determination as to which side of the device the break is situated, what distance from the device the break is situated, and whether a broken warp thread has come free or has become entangled. The device includes thread guides placed at a distance from each other which can be presented against the warp thread, a mechanism for gripping the broken warp thread and drawing it between the thread guides, measuring devices mounted on the thread guides or on the gripping mechanism, and a processing unit for processing data obtained from the measuring devices.

Device for determining the position of a warp thread break

A method and mechanism for repairing warp thread breaks in a weaving loom in which a broken warp thread is detected by a fallen drop wire of a warp stop motion device, the method comprising: upon the falling of a drop wire, taking a new warp thread from a supply of warp thread separate from the loom supply of warp thread, and moving the new warp thread to a position between the warp stop motion device and the harness of the loom by a rethreading mechanism; raising the fallen drop wire and threading a first end of the new warp thread through the raised drop wire by the rethreading mechanism; and threading a second end of the new warp thread through a heddle of the harness corresponding to the broken warp thread.

Method for repairing a broken warp thread on weaving machines, and the

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.

Process and apparatus for manipulating fallen drop wires of weaving loom

An apparatus for determining the location of a warp thread break in weaving looms using drop wires, including detection devices 6 to identify warp thread breaks, movable drop wire locators 7 to determine the warp thread break locations, switching devices 8 arranged to actuate the drop wire locators 7, causing the drop wire locators to move until a fallen drop wire is encountered, and indicators on the drop wire locators to indicate the position of the drop wire locator along the warp threads.

Growing community of inventors

Dikkebus-Ieper, Belgium

Dirk Gryson