Patents Assigned to Tokyo Rope Mfg. Co., Ltd.
  • Patent number: 5173341
    Abstract: Disclosed herein is a rubber-reinforcing steel wire which comprises: a steel wire; and a coating formed on the surface of said wire and containing a polymer of a triazine-thiol derivative represented by the following general formula: ##STR1## where R is --OR', --SR', --NHR', or --N(R').sub.2 ; R' is H, alkyl group, alkenyl group, phenyl group, phenylalkyl group, alkylphenyl group, or a cycloalkyl group, and M is H, Na, Li, K, 1/2Mg, 1/2Ba, 1/2Ca, primary, secondary or tertiary aliphatic amine, quaternary ammonium salt, or phosphonium salt.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: December 22, 1992
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventors: Nobuyoshi Shiratori, Masaki Katayama
  • Patent number: 5060466
    Abstract: A composite rope obtained by process comprising, impregnating a multifilament with epoxy resin and half-setting the resin to form a prepreg, twisting the plural prepregs together to form a primarily-twisted product, and wrapping the primarily-twisted product with a yarn or a porous tape. When it is wound round the primarily-twisted product, the yarn is closely wound at an angle substantially perpendicular to an axis of the primarily-twisted product. The method further comprises twisting the plural primarily-twisted products thus wrapped to form a secondarily-twisted product and then heating the secondarily-twisted product to completely set the resin impregnated.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: October 29, 1991
    Assignee: Tokyo Rope Mfg. Co. Ltd.
    Inventors: Shigeharu Matsuda, Hiroshi Takaki, Hiroshi Kimura
  • Patent number: 5027497
    Abstract: A method for forming an fixing end portion of a composite rope comprises the steps of mounting a mold on an end portion of the rope, pouring a molten metal in a cavity defined between the end portion of the rope and the mold under pressure, covering a predetermined part of the end portion of the rope with a cast metal formed from the molten metal, cold-pressing the cast metal and fixing the portion coated with the cast metal to a fixing member.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: July 2, 1991
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventors: Hiroshi Takaki, Hiroshi Kimura, Ryuichi Endo
  • Patent number: 4783955
    Abstract: A cord has a core including a plurality of wires, and an outer layer including a plurality of wires and surrounding the core. The wires of the core and of the outer layer are twisted together. All the wires of the core have a diameter larger than the wires of the outer layer, thereby guaranteeing a gap between adjacent wires of the outer layer.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: November 15, 1988
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventor: Takeshi Uchio
  • Patent number: 4738096
    Abstract: An open type metal cord has a plurality of cord units each constituted by at least one preformed metal wire member. The wire members within a given cord unit have the same preforming ratio but have a different ratio from that of the wire members within another cord unit. A difference between the largest preforming ratio and the smallest preforming ratio in cord units falls within the range of 0.20 to 0.40. In this case, the maximum preforming ratio possible for the wire members is 1.65 and the minimum preforming ratio possible for the wire members is 1.05. A total number of wire members constituting a metal cord according to the present invention is 3 to 5.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: April 19, 1988
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventors: Koji Hatakeyama, Masahiro Kusuda
  • Patent number: 4586324
    Abstract: A metal cord used as a reinforcement for rubber products. The cord includes a strand core composed of a plurality of metal wires stranded with each other. A plurality of metal wires are stranded around the strand core, forming a strand layer. The number of the metal wires which form the strand layer is less than 4 plus the number of the metal wires which form the strand core, and each of the metal wires which form both the strand core and layer has substantially the same diameter.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: May 6, 1986
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventor: Kaoru Mizuma
  • Patent number: 4501115
    Abstract: A wire rope for use in a traction type elevator system is coated with a soft-solid agent or a greasy agent having a drip temperature higher than 55.degree. C. and exhibiting physical properties such that it is evaporated in an amount less than 1 weight percent at 105.degree. C. for an interval of eight hours and elevates the coefficient of friction or traction between the wire rope and the drive sheave when coated on the wire rope.
    Type: Grant
    Filed: April 6, 1983
    Date of Patent: February 26, 1985
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Tokyo Rope Mfg., Co., Ltd., Hakko Kouyu Co., Ltd.
    Inventors: Katsuhiko Suzuki, Seihachi Naganuma
  • Patent number: 4265678
    Abstract: A metal wire cord which comprises a metal wire and a ternary alloy of Cu-Zn-Co coated on the surface of said metal wire. The wire cord has high drawability and such prominent adhesivity to rubber as is highly resistant to corrosion by saline water.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: May 5, 1981
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventors: Shunji Hachisuka, Shinji Kurashige, Yasuo Saahiro
  • Patent number: 4106276
    Abstract: A non-rotating rope, comprising 3 or 4 strands of of clam-shaped cross section so arranged around a flexible core equidistantly from the rope center that the principal axes of the clams are on the equiangularly spaced radial lines radiating from the rope center and the sides of the clams are in contact with one another with the apex and base of each clam directed inwards and outwards respectively, is closed in a direction opposite to the direction of the lay of the strands.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: August 15, 1978
    Assignee: Tokyo Rope Mfg. Co. Ltd.
    Inventor: Kiyoshi Hosoya
  • Patent number: 3996020
    Abstract: Where used as a reinforcing material for elastomeric body such as tire carcasses and wire belts for automobiles, or conveyer belts, a cord prepared by helically cold-forming a strand prepared by twisting together a plurality of wires so as to permit the cord outer diameter and pitch, respectively, to be 1.2 to 5.0 times and 4 to 21 times of the outer diameter of said strand type cord and/or wire rope type cord exhibits high elongation and, when incorporated in the elastomeric body, presents higher shock resistance, as compared with the conventional reinforcing cord.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: December 7, 1976
    Assignee: Tokyo Rope Mfg. Co., Ltd.
    Inventor: Kiyoshi Hosoya