Thread Gripper Patents (Class 139/448)
  • Patent number: 4129155
    Abstract: A weft carrying gripper for shuttleless looms with stationary weft supply, comprises a lower jaw whose relatively stationary upper surface is adapted to contact the weft. A rigid lever pivoted on the gripper carries a metallic lamina at one end that releasably grips the weft thread between itself and the stationary surface of the lower jaw. The same end of the lever also carries a leaf spring that bears resiliently against the lamina. A further leaf spring at the other end of the lever contacts an adjustable portion of the gripper to swing the lever in a direction to urge the lamina toward its weft-gripping position. That other end of the lever serves as a cam which when depressed releases the weft thread.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: December 12, 1978
    Assignee: Somet Societa' Meccanica Tessile S.p.A.
    Inventor: Alberto Merisio
  • Patent number: 4117871
    Abstract: At least one of the clamping surfaces of the yarn clamp is provided with a recess which extends longitudinally of the clamping jaws and along the yarn path. The recess is of a depth, at most, equal to the yarn thickness so as to ensure a reliable engagement of the yarn in accurate position for transfer, for example, to a shuttle. Guide teeth may also be provided on one of the jaws in order to effect centering of the yarn into the recess.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: October 3, 1978
    Assignee: Sulzer Brothers Limited
    Inventor: Franz Burer
  • Patent number: 4071055
    Abstract: An inserting carrier for looms with removal of a filling yarn from stationary bobbins having a filling yarn clamping tongue which is swingable perpendicular to a central plane of the warp yarn and supported on the bottom surface of the carrier.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: January 31, 1978
    Assignee: Ruti Machinery Works Ltd.
    Inventors: Paul Haltmeier, Erhard Freisler, Willy Rohr
  • Patent number: 4062382
    Abstract: An extending carrier for looms having a hook with a clamping tongue swingable perpendicular to the plane of the hook and having a control surface on the tongue having a deflection edge positioned on the side surface of the carrier which faces the point of formation of the shed of the loom, the point of the structural part which bears the deflection edge extending into the mouth of the hook.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: December 13, 1977
    Assignee: Ruti Machinery Works Ltd.
    Inventors: Willy Rohr, Lothar Kohler
  • Patent number: 4040454
    Abstract: A drawing gripper for gripping and transporting weft yarns in continuous weft feed looms, which draws the weft thread from the carrying gripper at the center of the shed and transports the same out of the shed, said drawing gripper comprising a fixed member carried by a support connected to the means for moving forward the gripper itself, and a movable member, oscillating in respect of the fixed member about a vertical axis, in a horizontal plane parallel to that containing said fixed member. This latter is provided with a hook end extending in a vertical plane, with the inner upper part of which cooperates the end of the movable member, under the action of return spring means.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: August 9, 1977
    Assignee: Albatex A.G.
    Inventor: Graziano Genini
  • Patent number: 4022250
    Abstract: The entry and exit rapiers of a weft inserting mechanism in a vertical weaving machine have guide means for contacting the sheets of warp strands which form a shed during the weaving of fabric so that lateral movement of the rapiers is inhibited while they are traveling weft-wise between the sheets. One rapier also has an associated clip guide for engaging the other rapier to prevent substantial vertical divergence of the rapiers as they come together so as to facilitate transfer of the weft yarn from the entry rapier to the exit rapier.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: May 10, 1977
    Assignee: Barber-Colman Company
    Inventor: Wayne C. Trost
  • Patent number: 4022253
    Abstract: A rapier of a weft inserting mechanism in a vertical weaving machine has an associated guide for engaging a cooperating rapier to prevent substantial divergence of the rapiers when they come together so as to facilitate transfer of the weft yarn from one rapier to the other during weft yarn insertion.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: May 10, 1977
    Assignee: Barber-Colman Company
    Inventor: Wayne C. Trost
  • Patent number: 3998251
    Abstract: This invention relates to an improvement in a clamping device adapted for use at a gripper head for a shuttleless loom, in which a gripper head pulls a weft thread out of the shed while held between two clamping jaws by a clamping lever of a clamping device subject to spring action while a control means acts upon said clamping lever provided with a clamping jaw, the improvement which comprises means whereby one of said clamping jaws is movable at a part carrying it and is springingly, yieldingly positioned, in the opening direction of the clamping device, in a limited manner, and said control means operates in a two-stage manner such that the first actuating stage is within the limits of movability of said movable clamping jaw, and the second actuating stage lifts the clamping jaws off of each other.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: December 21, 1976
    Assignee: Lindauer Dornier Gasellschaft mbH
    Inventor: Wilhelm Hadam
  • Patent number: 3986532
    Abstract: A weft extending carrier for shuttleless looms adapted to insert single picks of weft into separate sheds formed by warp threads. The carrier is provided with an elongated weft finger mounted for pivotal movement within the carrier which receives and grips weft introduced by a companion carrier while extending the same through the remainder of the shed. The elements forming the surfaces between which the weft is gripped, are arranged and have a configuration which prevents the accumulation of lint or foreign matter therebetween and provides a device for assuring positive gripping of the weft during each picking cycle.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: October 19, 1976
    Assignee: Rockwell International Corporation
    Inventor: Richard L. Volpe
  • Patent number: 3978897
    Abstract: A weft extending carrier for shuttleless looms adapted to insert single picks of weft into separate sheds formed by warp threads. The carrier is provided with an elongated weft finger one end of which is pivotally supported in the trailing end of the carrier and the opposite end defines a weft engaging recess or retaining hook that is biased in a direction to continuously urge the latter into a pocket formed in the leading end of the carrier. The retaining hook, in timed sequence with the weaving cycle is cammed outwardly from the pocket to release the pick of weft held thereby and provides a carrier which can accommodate a wider range of different types of weft than has been heretofor possible as well as providing a self cleaning feature that prevents the accumulation of lint in the gripping area of the carrier.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: September 7, 1976
    Assignee: Rockwell International Corporation
    Inventor: Anthony J. Tosches
  • Patent number: 3957089
    Abstract: An improved loom of the shuttleless type, which comprises for each weft inserter a magnetic guiding device mounted in the slay of the loom and having a ferromagnetic core, of elongated shape, with a coil wound longitudinally around the core. A pair of plates is engaged longitudinally on the opposite sides of the core and laterally delimiting the coil. The plates are positioned in planes perpendicular to the upper base of the slay and face a direction parallel to the direction of motion of the weft inserters. There are also provided a pair of non magnetic spacing plate members placed between the plates so as to define together with the plates themselves a rectangular housing within which is enclosed said coil. The plates thus define with their edges past the spacing plates, as the current passes through the coil, a magnetic guiding path within which run the weft inserters moving over the slay of the loom.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: May 18, 1976
    Inventor: Giovanna Martinelli