Weft Patents (Class 139/370.1)
  • Patent number: 7299827
    Abstract: A loom restarting method restarts a loom stopped due to a loom stopping cause without entailing a “wavy set mark”. When a loom is stopped due to a loom stopping cause entailing faulty picking, the loom restarting method provides a loom stopping command, withholds the loom from a picking operation during a braking period for braking the loom to stop the same in a weaving cycle subsequent to a weaving cycle in which the loom stopping cause occurred, reverses the loom to the weaving cycle in which faulty picking occurred, removes a weft yarn picked by faulty picking, and restarts the loom to resume a normal weaving operation. The main shaft of the loom is positioned, after removing the weft yarn picked by faulty picking, at an angular position at which a picking operation is possible in the weaving cycle in which the weft yarn picked by faulty picking was removed and the reed of the loom is not in contact with a weft yarn inserted in the cloth fell of a fabric on the loom, and then the loom is restarted.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: November 27, 2007
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Norio Minamitani, Masato Matsumoto, Hirohisa Kitamura, Kiyoshi Arie
  • Patent number: 7088061
    Abstract: A drive system powering a group of machines each fitted with a rectifying unit, wherein the inputs of the control devices of the machines' drive motors are interconnected by an electrical bus which implements a power exchange. The system enables swapping current from a power supply between motors of different machines.
    Type: Grant
    Filed: December 9, 2000
    Date of Patent: August 8, 2006
    Assignee: Picanol N.V.
    Inventor: Walter Bilcke
  • Patent number: 6983771
    Abstract: A feeding device for a mechanical weaving machine, including a winding element which can be driven in a rotating manner, a stationary storage, and at least one stop element. The stop element can be axially and radially moved in relation to the storage body, between an unwinding position releasing thread yarn and a stop position wherein the stop element is applied to the foremost winding and which ends the weft insertion. A yarn clamp is arranged downstream from the stop element, which initiates the respective weft insertion, and which can be switched between a passive position and a clamping position. The storage body has a small diameter, and the stop element is moved axially to the stop position solely by the windings due to a transport motion of the windings on the storage body.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: January 10, 2006
    Assignee: Iropa AG
    Inventors: Björn Halvarsson, Patrik Magnusson, Anders Svanström
  • Publication number: 20040016472
    Abstract: In a monitoring device used for the weft thread of a weaving machine, which comprises at least one insertion element having a thread clip movable to a thread-release position, and comprising a weft thread detector, which is used for monitoring the movement of the weft thread and which, during each insertion, is activated only for an observation interval ending at least approximately with the release of the inserted weft thread by the thread clip, an electric sensor (S) is provided in an opening device (B) arranged in the weaving machine and used for opening the thread clip (G) of the insertion element, said sensor (S) responding to the release position of the thread clip with a signal (i) representative of the end of the observation interval.
    Type: Application
    Filed: August 11, 2003
    Publication date: January 29, 2004
    Inventor: Stefano Lamprillo
  • Publication number: 20030000594
    Abstract: The leading end of a weft thread exiting from a weft insertion channel in an air jet weaving loom is monitored by a weft stop motion positioned in a weft stretching channel directly downstream, as viewed in the weft motion direction, of an exit of the weft insertion channel. The weft stop motion is either an additional weft stop motion monitor or it is the first weft stop motion device repositioned from a location at the exit of the weft insertion channel to a location in the weft stretching channel. In such a position in the weft stretching channel faults or deformations such as a loop in the leading end section of the weft thread are readily or positively detected for generating a respective loom control signal.
    Type: Application
    Filed: May 10, 2002
    Publication date: January 2, 2003
    Inventors: Werner Birner, Herbert Reinhardt, Christian Hannes, Alexander Chvorak, Peter D. Dornier