Patents by Inventor Shigeharu Sawada

Shigeharu Sawada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6705354
    Abstract: After a picking action of a weaving machine, a cloth-end warp maintains its shed over a plurality of weaving cycles including a weaving cycle in which weft ends are tucked in. Air is jetted toward a shed formed by warps in a widthwise direction of weaving from outside the cloth after the weaving cycle in which the weft ends are tucked in, and at latest before the cloth-end warp unsheds. The air jet energizes the weft ends, tucked in, inside the cloth in the widthwise direction of weaving.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: March 16, 2004
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Kazufumi Yama, Shigeharu Sawada
  • Publication number: 20030106603
    Abstract: After a picking action of a weaving machine, a cloth-end warp 12b maintains its shed over a plurality of weaving cycles including a weaving cycle, in which weft ends 18a are tucked in. An air is jetted toward a shed formed by warps in a widthwise direction of weaving from outside cloth 16 after that weaving, in which the weft ends 18a are tucked in, and at latest before the cloth-end warp 12b unsheds. This air jet energizes the weft ends 18a, tucked in, inside the cloth in the widthwise direction of weaving.
    Type: Application
    Filed: November 20, 2002
    Publication date: June 12, 2003
    Applicant: TSUDAKOMA KOGYO KABUSHIKI KAISHA
    Inventors: Kazufumi Yama, Shigeharu Sawada
  • Patent number: 6422270
    Abstract: A tuck-in apparatus for producing a fastened tuck-in-selvage includes a tuck-in nozzle for injecting air into a warp shed from the outside of a warp array in order to fold back a weft yarn end toward a cloth fell. A selvage-fastening nozzle is disposed adjacent to the cloth fell outside the warp array for causing the weft yarn end folded back by the tuck-in nozzle to extend along the cloth fell. Timing control is provided to provide a first period of air injection from the tuck-in nozzle and a second period of air injection from the selvage-fastening nozzle so that the beginning of the second period is later than the beginning of the first period, and the second period ends before the warp shed is closed.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: July 23, 2002
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Akihiko Nakada, Shigeharu Sawada
  • Patent number: 6394146
    Abstract: A split reed has a weaving reed formed by successively arranging dents respectively provided with recesses forming a weft yarn guide path having a back surface, and an auxiliary reed respectively provided with recesses forming a weft yarn guide path having a back surface. The weaving reed and the auxiliary reed are attached to a slay or the respective dents of the weaving reed and the auxiliary reed are formed so that the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weaving reed with respect to the cloth fell of a fabric on the loom when the weaving reed and the auxiliary reed are attached to the slay.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: May 28, 2002
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Takeshi Satou, Akihiko Nakada, Shigeharu Sawada
  • Publication number: 20020011275
    Abstract: A split reed has a weaving reed formed by successively arranging dents respectively provided with recesses forming a weft yarn guide path having a back surface, and an auxiliary reed respectively provided with recesses forming a weft yarn guide path having a back surface. The weaving reed and the auxiliary reed are attached to a slay or the respective dents of the weaving reed and the auxiliary reed are formed so that the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weaving reed with respect to the cloth fell of a fabric on the loom when the weaving reed and the auxiliary reed are attached to the slay.
    Type: Application
    Filed: May 16, 2001
    Publication date: January 31, 2002
    Inventors: Takeshi Satou, Akihiko Nakada, Shigeharu Sawada
  • Publication number: 20020007862
    Abstract: A tuck-in apparatus including a tuck-in nozzle 9 for injecting air into a warp shed 19 from the outside of warp arrays 1 in order to fold back a weft yarn end 18 toward a cloth fell 2, characterized by: a selvage-fastening nozzle 10 disposed adjacent to the cloth fell 2 outside the warp arrays 1 for causing the weft yarn end 18 folded back by the tuck-in nozzle 9 to extend along the cloth fell 2, wherein air injection from the tuck-in nozzle 9 and that from the selvage-fastening nozzle 10 are independently controllable, and wherein air injection start timing of the selvage-fastening nozzle 10 is later than that of the tuck-in nozzle 9, but is set to be put before the warp shed is closed. The tuck-in apparatus is designed to provide a satisfactorily fastened tuck-in selvage.
    Type: Application
    Filed: July 23, 2001
    Publication date: January 24, 2002
    Applicant: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Akihiko Nakada, Shigeharu Sawada
  • Patent number: 6336476
    Abstract: Compared with the method for performing tuck-in operation at each weaving cycle, the method of the present invention makes it possible to increase the number of revolutions of the loom at high speed, to decrease the number of maintenance operations needed for the tuck-in device and to decrease power consumption. Moreover, compared with the method for performing collective tuck-in operation by bringing all wefts inserted into each repeat together, it is possible to improve external appearance of the selvedge of the pile fabric. According to the tuck-in selvedge setting method in a tuck-in device of a shuttleless loom for towel of the present invention, when a pile fabric is woven, tuck-in operations for ends of a plurality of wefts inserted into one repeat for forming a pile fabric are performed by a plurality of times.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: January 8, 2002
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Akihiko Nakada, Shigeharu Sawada
  • Patent number: 6325111
    Abstract: In a selvedge forming device, the operation condition for operating at least one of the selvedge forming elements contributing to the selvedge formation is set in advance in correspondence to a weaving condition, and the selvedge forming device is operated in accordance with the weaving condition and the operating condition as set in advance, while the weaving process goes on.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: December 4, 2001
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Akihiko Nakada, Shigeharu Sawada
  • Patent number: 6321796
    Abstract: A tuck-in apparatus for shuttleless loom comprises a nozzle block adapted to be provided in a warp side of a cutter cutting a weft, the nozzle block is formed with a slit opening towards three sides, including a warp side, a warp feed side, and a cutter side. The nozzle block includes a drive nozzle guiding a weft end placed within the slit to a front side along the weft feed direction by air supplied through the drive nozzle and a guide nozzle folding the weft end back into a warp shedding by air supplied through the guide nozzle wherein the slit extends parallel to a warp line and a depth end of the slit is set to come near an extended line from a cloth fell.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: November 27, 2001
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventor: Shigeharu Sawada
  • Publication number: 20010015236
    Abstract: In a selvedge forming device, the operating condition for operating at least one of the selvedge forming elements contributing to the selvedge formation is set in advance in correspondence to a weaving condition, and the selvedge forming device is operated in accordance with the weaving condition and the operating condition as set in advance, while the weaving process goes on.
    Type: Application
    Filed: January 29, 2001
    Publication date: August 23, 2001
    Applicant: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Akihiko Nakada, Shigeharu Sawada
  • Patent number: 6240976
    Abstract: A tuck-in apparatus for a shuttleless loom, for blowing an end portion of a weft into a shed, includes a plurality of nozzles located on a side of the row of warps for jetting air. The plurality of nozzles include: a tuck-in nozzle located in the vicinity of a cloth fell and oriented in substantially parallel with the cloth fell; and at least one auxiliary tuck-in nozzle oriented by an acute angle toward a warp supply side with respect to the cloth fell.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: June 5, 2001
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Takeshi Satoh, Shigeharu Sawada
  • Patent number: 5351721
    Abstract: When mispicking occurs, a weft yarn continuous with a mispicked weft yarn is inserted into the shed of warp yarns in a loop by the jetting of a main picking nozzle and auxiliary picking nozzles. A weft yarn retaining member is positioned in the loop of the weft yarn and the mispicked weft yarn is pulled to be removed from the picking side by way of the weft yarn. Given auxiliary picking nozzles stop jetting when the weft yarn is inserted in a loop so that the tip end of the loop of the inserted weft yarn is limited in the extent to which it moves in the picking direction, and thus does not extend substantially beyond the arriving side of the shed of warp yarns, so as to prevent entanglement thereof with various other members.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: October 4, 1994
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Shigeharu Sawada, Satoshi Azuma, Yoshinobu Tobe
  • Patent number: 5345975
    Abstract: A faulty weft yarn removing apparatus for a loom, having weft yarn extracting devices disposed on the picking side and receiving side of a fabric, respectively, capable of removing the faulty weft yarns (Y1, Y2) smoothly even when the phenomena of long pick and broken pick both occur. A control circuit determines the long pick or the broken pick when the yarn signals (S1, S2) transmitted from the weft yarn feelers are present, first actuates a weft yarn extracting device disposed on the picking side and if there is a yarn signal (S2) after a specified time passes, actuates the weft yarn extracting device on the receiving side. The weft yarn extracting device is capable of removing the faulty weft yarn (Y1) to the picking side of the fabric and the weft yarn extracting device is capable of removing the faulty weft yarn (Y2) to the receiving side of the fabric.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: September 13, 1994
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventor: Shigeharu Sawada