Patents Assigned to Tokiwa Chemical Industry Co., Ltd.
  • Patent number: 11141897
    Abstract: A method for producing an extrusion molded product, wherein the method uses a holder (6) for feeding a core material (11), the holder (6) being provided with cutting guide holes (7) through which cutting blades (2) go to form grooves (12) in the core material (11); when rotary bodies (3) provided with the cutting blades (2) start rotating, the core material (11) and the holder (6) stand by at a predetermined standby position that does not enable the cutting blades (2) to cut the core material (11); and when the rotation speeds of the rotary bodies (3) reach predetermined rotation speeds, the holder (6) is or the rotary bodies (3) are moved so that the cutting blades (2) can start cutting the core material (11) proceeding through the holder (6), and then the cutting blades (2) form a plurality of grooves (12) in the core material (11).
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 12, 2021
    Assignees: TOKIWA CHEMICAL INDUSTRIES CO., LTD., TOKIWA KEISEI CO., LTD.
    Inventors: Takashi Hirokawa, Naohisa Miyakawa
  • Publication number: 20200282618
    Abstract: A method for producing an extrusion molded product, wherein the method uses a holder (6) for feeding a core material (11), the holder (6) being provided with cutting guide holes (7) through which cutting blades (2) go to form grooves (12) in the core material (11); when rotary bodies (3) provided with the cutting blades (2) start rotating, the core material (11) and the holder (6) stand by at a predetermined standby position that does not enable the cutting blades (2) to cut the core material (11); and when the rotation speeds of the rotary bodies (3) reach predetermined rotation speeds, the holder (6) is or the rotary bodies (3) are moved so that the cutting blades (2) can start cutting the core material (11) proceeding through the holder (6), and then the cutting blades (2) form a plurality of grooves (12) in the core material (11).
    Type: Application
    Filed: June 18, 2019
    Publication date: September 10, 2020
    Applicant: Tokiwa Chemical Industries Co., Ltd.
    Inventors: Takashi HIROKAWA, Naohisa MIYAKAWA
  • Patent number: 10632661
    Abstract: A method for producing an extrusion molded product for automobiles, comprising the following steps: A synthetic resin injected into a first extrusion molding machine (21) is extruded through a first mold die (20) as a core material (3); the core material (3) passes through a first cooling tank (25), and then is bent by bending rollers (22) into a desired curved shape with a radius of curvature R1; the core material (3) is extended linearly, and goes into a second mold die (23); a thermoplastic elastomer injected in a second extrusion molding machine (24) forms seal portions (2) and seal lip portions (6) on a periphery of the core material (3); thereby forming a curved portion with a radius of curvature R2 on the extrusion molded product (1).
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: April 28, 2020
    Assignees: TOKIWA CHEMICAL INDUSTRIES CO., LTD., TOKIWA KEISEI CO., LTD.
    Inventors: Takashi Hirokawa, Katsuhisa Kato
  • Publication number: 20180162033
    Abstract: A method for producing an extrusion molded product for automobiles, comprising the following steps: A synthetic resin injected into a first extrusion molding machine (21) is extruded through a first mold die (20) as a core material (3); the core material (3) passes through a first cooling tank (25), and then is bent by bending rollers (22) into a desired curved shape with a radius of curvature R1; the core material (3) is extended linearly, and goes into a second mold die (23); a thermoplastic elastomer injected in a second extrusion molding machine (24) forms seal portions (2) and seal lip portions (6) on a periphery of the core material (3); thereby forming a curved portion with a radius of curvature R2 on the extrusion molded product (1).
    Type: Application
    Filed: October 19, 2017
    Publication date: June 14, 2018
    Applicants: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Takashi HIROKAWA, Katsuhisa KATO
  • Publication number: 20170217069
    Abstract: A thermoplastic elastomer composition forming the contact portion (6) comprises: 30 to 60 parts by weight of component (a): a block copolymer comprising at least two polymer blocks A mainly comprising a vinyl aromatic compound and at least one polymer block B mainly comprising a conjugated diene compound, and/or a hydrogenated block copolymer obtained by hydrogenating the block copolymer; 10 to 30 parts by weight of component (b): a homopolymer of crystalline ethylene or propylene, or a crystalline copolymer mainly comprising the ethylene or propylene; and 25 to 55 parts by weight of component (c): a rubber softener; and in addition to the above-mentioned (a)+(b)+(c)=100 parts by weight; 3 to 15 parts by weight of component (d): a petroleum resin and/or a hydrogenated petroleum resin obtained by hydrogenation.
    Type: Application
    Filed: June 14, 2016
    Publication date: August 3, 2017
    Applicants: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Takashi HIROKAWA, Katsuhisa KATO
  • Patent number: 8479451
    Abstract: An extrusion molded product having a core material for mounting thereof on a flange around the periphery of an opening of an automobile body, such as a door, a trunk, a back door, and a slide door includes a pressure receiving member including a soft thermoplastic elastomer composition connected to opposed side portions of a core material having a generally U-shaped cross section in the longitudinal direction, a hollow chamber formed in the upper portion of the core material by connecting the pressure receiving member to the opposed side portions of the core material, and a sealing portion having a thickness thinner than a thickness of the pressure receiving member formed in a part of the pressure receiving member.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: July 9, 2013
    Assignees: Tokiwa Chemical Industries, Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 7459111
    Abstract: A method of manufacturing a synthetic resin core material having a substantially U-shaped cross section which is used in are extruded molding product for holding an opening portion of a vehicle body such as a door or a trunk of an automobile comprises the steps of extruding a synthetic resin to form a core material having a substantially U-shaped cross section, moving the U-shaped core material toward a cutting machine, rotating opposed rotors having blade-shaped portions in the cutting machine, and cutting and forming cut portions or cut slot portions on both lateral sides of the U-shaped core material.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: December 2, 2008
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 7044525
    Abstract: An automotive extrusion-molded product includes a core material (2) having a U-shaped cross section which is made of a hard synthetic resin. The core material has cut portions (7, 8) with various shapes extending in the lengthwise direction. A coating body (3) made of a soft synthetic resin is adhered to the core material so as to cover the core material. The coating body (3) is provided with a pushed-in portion (5) formed integrally with the coating body and extending downward beyond the end portion (4, 4) of the core material so as to be pushed in toward an inner peripheral surface (14) having a U-shape cross section of the core material.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: May 16, 2006
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 6273983
    Abstract: A molding for a vehicle and its manufacturing method, wherein a molding body excellent in rigidity is formed by a mixture of a hard olefin based resin and powders such as mica, talc, glass fibre, etc., and is coated with a protective film layer of an olefin based resin, excellent in resistance to scuffing and chemicals, on the exposed surface. An intermediate adhesive layer having a thermofusion bond property, which is an olefin based thermoplastic elastomer resin composition, or a styrene based thermoplastic elastomer resin composition, can be sandwiched between the hard olefin based resin of the molding body and olefin based resin of the protective film layer. The molding body, the intermediate adhesive layer if present, and the protective film layer are integrally molded by several extruders and firmly laminated as a whole.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: August 14, 2001
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 6218623
    Abstract: A protective tubular member for an automotive control wire includes a hollow tubular member made of a synthetic resin and a protective film layer joined integrally to the hollow tubular member. The protective film layer is provided with a rough surface portion having irregularities on the exposed surface of the protective film layer.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: April 17, 2001
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 6217807
    Abstract: A molding for automobile includes a molding body (1, 25) comprising a vertical supporting portion (2, 26) made of a synthetic resin, a decorative portion (3, 27) made from synthetic resin and integrally connected to the vertical supporting portion (2, 26), and a metal piece (5, 28) embedded in the vertical supporting portion (2, 26) and decorative portion (3, 27), wherein the metal piece (5, 28) is rigidly and integrally joined to the molding body (1, 25) via an adhesive resin layer (6, 29) of a polar group containing thermoplastic resin composition.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: April 17, 2001
    Assignees: Tokiwa Chemical Industries, Co., Ltd, System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 6174477
    Abstract: A method for producing a window molding for an automotive vehicle having an upper molding including a leg portion, a glass limiting lip projecting from the leg portion, a head portion connected to the leg portion and the glass limiting lip and a side molding which includes the leg portion and the glass limiting lip, a strut portion connected to the leg portion, and a head portion connected to the strut portion; where a length of the strut portion and an angle between the head portion and the glass limiting lip are gradually increased from an end of said side molding connected to said upper molding to the other end is disclosed.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: January 16, 2001
    Assignees: Kinugawa Rubber Ind. Co., Ltd., Tokiwa Chemical Industry Co., Ltd.
    Inventors: Yuuji Nagahashi, Sumito Ichinohe, Hiroyoshi Imura, Takashi Hirokawa
  • Patent number: 6106047
    Abstract: A window molding installed at a clearance between a front window and a window frame of an automotive vehicle has an upper molding and a side molding continuous in the longitudinal direction. The side molding has a strut portion which is formed between a head portion for covering the clearance and a leg portion inserted to the clearance so that a length of the strut portion and an angle between the head portion and a glass limiting lip connected to the leg portion are gradually increased from an end of the side molding connected to the upper molding to the other end. The window molding is produced by extrusion molding by means of an apparatus using a fixed die head and a movable die head.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: August 22, 2000
    Assignees: Kinugawa Rubber Ind. Co., Ltd., Tokiwa Chemical Industry Co., Ltd.
    Inventors: Yuuji Nagahashi, Sumito Ichinohe, Hiroyoshi Imura, Takashi Hirokawa
  • Patent number: 5945512
    Abstract: Provided by the present invention are a human prorenin profragment N-terminated peptide antibody capable of specifically recognizing a peptide containing at least 15 amino acid residues from the first leucine residue to the 15th arginine residue in the N-terminated peptide of the human prorenin profragment and a complex of the same with human prorenin. The antibody can be used as a prorenin assay reagent. The human prorenin profragment N-terminated peptide antibody is useful as a reagent for the assay of human prorenin in blood.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: August 31, 1999
    Assignees: Tokiwa Chemical Industries Co., Ltd., Yuichi Ishida
    Inventors: Kazuo Murakami, Yukio Nakamura, Fumiaki Suzuki, Yuichi Ishida, Yasuhiko Hatano
  • Patent number: 5553423
    Abstract: A front glass molding for a vehicle is interposed between a body panel and a glass panel of a front glass portion of the vehicle. This molding comprises a head molding and first and second legs. The first leg is inserted in the head molding at left and right side sections of the molding and the second leg is inserted into the head molding at an upper section of the molding to securely and easily fix the glass panel to the body panel.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: September 10, 1996
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventor: Katsuhisa Kato
  • Patent number: 5447671
    Abstract: An edging member for a window glass of an automobile door is provided with a plurality of contacting surfaces against which window glass is contacted. Each contacting surface is provided with a rough contacting layer respectively including a synthetic resin prepared by mixing large and small particles or grains of materials having different melting points, such as nylon, urethane, fluoro-resin and polyolefin resin, polystyrene resin and the like. The rough contacting layer is extruded simultaneously with the extrusion molding of the edging member.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: September 5, 1995
    Assignees: Tokiwa Chemical Industries & Co., Ltd., Masuzawa Chemical Sales, Co., Ltd., System Technical Co., Ltd.
    Inventors: Katsuhisa Kato, Naohisa Miyakawa, Minoru Masuzawa
  • Patent number: 5441685
    Abstract: An edging member of a window glass for an automobile door is provided with a plurality of contacting portions to which the window glass is contacted. Each of the contacting portions is provided with a batten surface layer including a synthetic resin such as nylon, urethane and polyolefin resin, and powders or grains of mica, molybdenum and/or graphite mixed with the synthetic resin. A rough surface having projections and recesses is formed on the front surface of the batten surface layer by extruding the batten surface simultaneously with the extrusion molding of the edging member.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: August 15, 1995
    Assignees: Tokiwa Chemical Industries Co., Ltd., Masuzawa Chemical Sales Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Minoru Masuzawa, Katsuhisa Kato
  • Patent number: 5424019
    Abstract: A method for manufacturing a weather strip for motor vehicles, wherein the weather strip body is provided with a protective film having a low friction characteristic and an increased tightness on an abutment portion with which the glass pane of the vehicle door is brought into contact. An olefin polymer based resin or a foamed material thereof, is extruded from one extrusion molding machine into a mold, is so to form the weather strip body, while a mixture consisting of a base material of an olefin polymer based resin having low viscosity and high fluidity and grains of particles of an additive material of an olefin polymer based resin having a high viscosity and low fluidity is extruded from another molding machine into the mold, so as to form the protective film. The weather strip body and the protective film are co-extruded and polymerized in the mold, and a rough surface having a plurality of protrusions is formed by the grains or particles of the additive material on the surface of the protective film.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: June 13, 1995
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Patent number: 5343655
    Abstract: A weather strip allowing the opening and closing operations of the window glass in a door of automobile to be performed is formed by a base portion made of a hard synthetic resin, a support portion made of a soft synthetic resin and a contacting band layer comprising two synthetic resins of different melting points, of which powder or particles of the synthetic resin of a high melting point are mixed with the synthetic resin of a low melting point. The contacting band layers are provided on the portions of the base portion and support portion where the window glass abuts. The contacting band layer is formed by extrusion simultaneously with the extrusion of the base portion and support portion, whereby a rough face is integrally formed on the surface of the contacting band layer.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: September 6, 1994
    Assignees: Tokiwa Chemical Industries Co., Ltd., Masuzawa Chemical Sales Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Minoru Masuzawa, Katsuhisa Kato
  • Patent number: 5283100
    Abstract: Disclosed is a molding a molding for mounting a window glass on the window opening of an automotive body, said molding for automobile windows comprising a flexible leg portion, an upper flange portion which extends toward both sides at an upper part of the leg portion and supports the edge portion of the glass, upper lip portions that form both tips of said upper flange portion, and lower lip portion which are adhered to the window opening of the automotive body, wherein at least the upper lip portions and the lower lip portions of said molding are formed by using a thermoplastic olefinic elastomer or a composition of said elastomer and an olefin-ethylene type unsaturated carboxylic acid copolymer or a salt thereof having a hardness in compliance with JIS A of from 50 to 80, said leg portion and said flange portion are formed by using a blend of the thermoplastic olefinic elastomer and the olefin-ethylene type unsaturated carboxylic acid copolymer or a salt thereof, said blend having a hardness in compliance
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: February 1, 1994
    Assignees: Dupont-Mitsui Polychemicals Co., Ltd., Tokiwa Chemical Industry Co., Ltd.
    Inventors: Toshio Yui, Yoshimasa Yamamoto, Naohisa Miyakawa