Method for repairing a broken warp thread on weaving machines, and the rethreading mechanisms used
AssigneePicanol N.V.
InventorsStefan Dewaele, Dirk Gryson
Life of this patent
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Abstract
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.
Claims17
A method 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 motin device and a harness of the loom by means of a rethreading mechanism;
- raising the fallen drop wire and threading a first end of the new warp thread through the raised drop wire by means of 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.
A method for repairing warp thread breaks in a weaving loom comprising a tying-in device and 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, gripping an end of the broken warp thread extending from a warp beam of the loom at a location between the warp beam and the stop motion device;
- inserting the broken end of the warp thread into the tying-in device;
- raising the fallen drop wire to its normal position;
- moving a rethreading mechanism to a position between the warp stop motion device and harness of the loom;
- taking a first end of a new warp thread from a separate supply of warp thread and threading the first end through the raised drop wire by means of the rethreading mechanism;
- inserting the first end of the new warp thread into the tying-in device after it is threaded through the raised drop wire;
- joining the first end of the new warp thread to the broken end of the warp thread in the tying-in device;
- removing an end of the broken warp thread extending from the cloth;
- threading a second end of the new warp thread through a heddle of the harness corresponding to the broken warp thread;
- threading the second end of the new warp thread through a reed of the loom after it is threaded through the heddle;
- and
- cutting off the second end of the new warp thread from the separate supply and weaving the second end into the cloth.
A rethreading mechanism for repairing warp thread breaks in weaving looms in which a broken warp thread is detected by a fallen drop wire from a plurality of drop wires of a warp stop motion device, the rethreading mechanism comprising:
- a new warp thread supply separate from a warp thread supply of said loom;
- a first threading device supplied with new warp thread from said separate supply and arranged to thread a first end of a length of new warp thread through said drop wires of said warp stop motion device;
- a second threading device supplied with new warp thread from said separating supply and arranged to thread a second end of said length of new warp thread through heddles in a harness of said loom;
- and
- a positioning mechanism arranged to position said first and second threading devices relative to said loom by moving said first and second threading devices vertically and horizontally between said warp stop motion device and said harness of said loom.
A rethreading mechanism for repairing warp thread breaks in weaving looms in which a broken warp thread is detected by a fallen drop wire from a plurality of drop wires of a warp stop motion device, the rethreading mechanism comprising:
- a new warp thread supply separate from a warp thread supply of said loom;
- a threading device supplied with said new warp thread from said separate supply and including a needle arranged to swing through an arc of 180.degree. between a position where said needle points at said warp stop motion device and a position where said needle points at a harness of said loom, said needle having an eye at one end arrange to receive said new warp thread supplied to said threading device;
- and a positioning mechanism arranged to position said threading device relative to said loom by moving said threading device parallel to the warp threads of said loom.
Dependencies are inferred from the claim text.