Patents by Inventor Toru Takegawa

Toru Takegawa 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: 8043983
    Abstract: A flame-retardant metal-coated cloth having a high degree of flame retardancy and a soft feeling without the use of any halogen compound or antimony compound is provided. In the flame-retardant metal-coated cloth, a flame-retardant film comprising a mixture (E) of a phosphorus compound (A), a metal hydroxide (B), a phosphoric ester (C), and a thermoplastic resin (D), is formed on at least one surface of a metal-coated cloth, and the ratio of (A):(B):(C):(D) is 20 to 200:100 to 950:10 to 250:100 in terms of a weight ratio.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: October 25, 2011
    Assignees: Daikyo Chemical Co., Ltd., Seiren Co., Ltd.
    Inventors: Terufumi Iwaki, Katsuo Sasa, Sachiyo Sakagawa, Toru Takegawa
  • Patent number: 7935405
    Abstract: A flame-retardant metal-coated fabric which not only has excellent electromagnetic wave shielding properties but has a high degree of flame retardancy without the necessity of containing a halogen compound or antimony compound. It is soft and suffers no deterioration of the metal coating even in long-term use.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: May 3, 2011
    Assignee: Seiren Co., Ltd.
    Inventors: Sachiyo Sakagawa, Toru Takegawa, Terufumi Iwaki, Katsuo Sasa
  • Publication number: 20100203789
    Abstract: An electrically conductive material for an electrically conductive gasket is to be provided, the electrically conductive material permitting easy manufacture of an electrically conductive gasket in an arbitrary shape, having a cushioning property and making it possible to greatly diminish cutting wastes in punching work and also greatly diminishing the formation of fray and fluff. According to the present invention there are provided an electrically conductive material comprising a metalized non-woven fabric of a self-bonded continuous organic fiber, as well as an electrically conductive material comprising a metalized, integrally laminated composite sheet of both a non-woven fabric of a self-bonded continuous organic fiber and an organic fiber structure sheet.
    Type: Application
    Filed: January 17, 2007
    Publication date: August 12, 2010
    Applicants: SEIREN CO., LTD., KB SEIREN, LTD.
    Inventors: Kiyotaka Takebayashi, Toru Takegawa, Yutaka Tanaka, Hiroyasu Shimizu
  • Publication number: 20100116542
    Abstract: The present invention provides a metal coated fabric having excellent electromagnetic shielding properties. The metal coated fabric of the present invention has a layer of a flame retardant composition on at least one surface thereof, the flame retardant composition being prepared without using a halogen compound or antimony compound.
    Type: Application
    Filed: April 16, 2009
    Publication date: May 13, 2010
    Applicant: SEIREN CO., LTD.
    Inventors: Shigekazu Sugihara, Toru Takegawa, Terufumi Iwaki, Katsuo Sasa
  • Publication number: 20090068907
    Abstract: A flame-retardant metal-coated fabric which not only has excellent electromagnetic wave shielding properties but has a high degree of flame retardancy without the necessity of containing a halogen compound or antimony compound. It is soft and suffers no deterioration of the metal coating even in long-term use.
    Type: Application
    Filed: April 19, 2006
    Publication date: March 12, 2009
    Inventors: Sachiyo Sakagawa, Toru Takegawa, Terufumi Iwaki, Katsuo Sasa
  • Publication number: 20080176082
    Abstract: A film of a filler resin is disposed on at least one surface of a metal-coated cloth, and a flame retardant film of a mixed resin of a flame retardant and a thermoplastic resin is disposed on at least one of the surface of the film of the filler resin or a surface of the metal-coated cloth on which a film of the filler resin is not disposed. As the filler resin and the thermoplastic resin, at least one selected from the group consisting of an acrylate resin, a urethane resin and a polyester resin can be used, and as the flame retardant, at least one selected from the group consisting of a bromine compound, a phosphorous compound and an antimony compound can be used.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 24, 2008
    Inventors: Sachiyo Sakagawa, Toru Takegawa
  • Patent number: 7238632
    Abstract: The present invention provides an electromagnetic wave shielding material including a three dimensionally knitted base material and a conductive metal layer formed on the three dimensionally knitted base material, which shielding material is characterized in that it comprises: a heat-fusing thread used at at least a portion of the three dimensionally knitted base material; and a portion in which connection thread is not present, wherein the amount of cutting debris generated at the time of cutting is decreased. According to the present invention, an electromagnetic wave shielding material, which is used for an electromagnetic wave shielding gasket for shielding electromagnetic wave, exhibits good workability if the thickness of the product is relatively thin, suppresses the metal separation and reduces the amount of cutting debris generated at the time of cutting, is obtained.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: July 3, 2007
    Assignee: Seiren Co., Ltd.
    Inventors: Shigekazu Orita, Toru Takegawa, Yasufumi Katsuki, Fumio Shirasaki
  • Publication number: 20050159061
    Abstract: A flame-retardant metal-coated cloth having a high degree of flame retardancy and a soft feeling without the use of any halogen compound or antimony compound is provided. In the flame-retardant metal-coated cloth, a flame-retardant film comprising a mixture (E) of a phosphorus compound (A), a metal hydroxide (B), a phosphoric ester (C), and a thermoplastic resin (D), is formed on at least one surface of a metal-coated cloth, and the ratio of (A):(B):(C):(D) is 20 to 200:100 to 950:10 to 250:100 in terms of a weight ratio.
    Type: Application
    Filed: January 14, 2005
    Publication date: July 21, 2005
    Inventors: Terufumi Iwaki, Katsuo Sasa, Sachiyo Sakagawa, Toru Takegawa
  • Publication number: 20030036326
    Abstract: To a composite sheet in which on one or both surfaces of an open cell foam sheet fiber cloth is bonded, a conductive metal coating is provided so as to maintain the open cell of the foam followed by providing thereon a flame retardant composition, thereby a flame retardant conductive material suitable for a gasket material for electromagnetic wave shield is obtained.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 20, 2003
    Applicant: SEIREN CO. LTD.
    Inventors: Susumu Takagi, Akihide Katayama, Sachiyo Sakagawa, Toru Takegawa
  • Publication number: 20020016119
    Abstract: The present invention provides an electromagnetic wave shielding material including a three dimensionally knitted base material and a conductive metal layer formed on the three dimensionally knitted base material, which shielding material is characterized in that it comprises: a heat-fusing thread used at at least a portion of the three dimensionally knitted base material; and a portion in which connection thread is not present, wherein the amount of cutting debris generated at the time of cutting is decreased. According to the present invention, an electromagnetic wave shielding material, which is used for an electromagnetic wave shielding gasket for shielding electromagnetic wave, exhibits good workability if the thickness of the product is relatively thin, suppresses the metal separation and reduces the amount of cutting debris generated at the time of cutting, is obtained.
    Type: Application
    Filed: June 29, 2001
    Publication date: February 7, 2002
    Inventors: Shigekazu Orita, Toru Takegawa, Yasufumi Katsuki, Fumio Shirasaki
  • Patent number: D962096
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: August 30, 2022
    Assignee: Otsuka Electronics Co., Ltd.
    Inventors: Sayaka Obana, Toru Takegawa, Hiroya Nagasawa, Ikuo Wakayama, Minoru Suzuki