Patents by Inventor Mitsuru Yamakawa

Mitsuru Yamakawa 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).

  • Method for forming an end of slide fastener chain
    Patent number: 6757953
    Abstract: A method for forming ends of a slide fastener chain wherein, coil-shaped fastener elements such as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, each end of the fastener elements is stabilized, so that the resultant slide fastener is safe.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: July 6, 2004
    Assignee: YKK Corporation
    Inventors: Masao Matsumoto, Kazuki Kuse, Hideo Shimai, Mitsuru Yamakawa
  • Apparatus for end forming of slide fastener chain
    Patent number: 6745443
    Abstract: According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: June 8, 2004
    Assignee: YKK Corporation
    Inventors: Masao Matsumoto, Kazuki Kuse, Hideo Shimai, Mitsuru Yamakawa
  • Slide fastener chain, method and apparatus for forming end thereof
    Publication number: 20020121007
    Abstract: According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 5, 2002
    Applicant: YKK Corporation
    Inventors: Masao Matsumoto, Kazuki Kuse, Hideo Shimai, Mitsuru Yamakawa
  • Slide fastener chain, method and apparatus for forming end thereof
    Publication number: 20020121006
    Abstract: According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 5, 2002
    Applicant: YKK Corporation
    Inventors: Masao Matsumoto, Kazuki Kuse, Hideo Shimai, Mitsuru Yamakawa
  • Slide fastener chain, method and apparatus for forming end thereof
    Patent number: 6427295
    Abstract: According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: August 6, 2002
    Assignee: Ykk Corporation
    Inventors: Masao Matsumoto, Kazuki Kuse, Hideo Shimai, Mitsuru Yamakawa