Patents by Inventor Tadahiro Sawada

Tadahiro Sawada 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: 6830845
    Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: December 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasuhiko Shoji, Seiji Wada, Shigeto Noya, Tadahiro Sawada, Takayuki Aoi, Minoru Koda, Saburo Nakatsuka, Tsutomu Moriwaki
  • Patent number: 6541152
    Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: April 1, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasuhiko Shoji, Seiji Wada, Shigeto Noya, Tadahiro Sawada, Takayuki Aoi, Minoru Koda, Saburo Nakatsuka, Tsutomu Moriwaki
  • Publication number: 20030013011
    Abstract: In the process of manufacturing a cylindrical battery, when a tubular separator (3) and bottom separator (5) are inserted into a battery casing (1) in which are accommodated positive electrode mixture pellets (2), by inserting the bottom separator (5) such that it is pushed into the battery casing (1) at the leading end of the tubular separator (3), the peripheral portion of the bottom separator (5) is raised up, so that both separators (3,5) are inserted into the battery casing (1) in a condition with the leading end of the tubular separator (3) surrounded from the outside by this peripheral raised-up portion.
    Type: Application
    Filed: September 10, 2002
    Publication date: January 16, 2003
    Inventors: Yasuhiko Shoji, Seiji Wada, Shigeto Noya, Tadahiro Sawada, Takayuki Aoi, Minoru Koda, Saburo Nakatsuka, Tsutomu Moriwaki
  • Patent number: 5979279
    Abstract: A rapping device is provided for forming a battery separator or the like by rapping from a flexible elastic band material. A rapping device for manufacturing works in a specified shape by rapping from an elastic band material comprises a conveying drum having a first suction unit and a second suction unit for conveying the band material while suction is applied, a die drum having a blade possessing a forming position for rapping and forming the works with a width coinciding with the width of the band material, and a cutting position for cutting between the adjacent works, disposed continuously on the outer circumference at every pitch equal to the length of each work, and a die drum driving device for rotating and driving the die drum in synchronization with the conveying speed of the band material.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: November 9, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshichika Matsumoto, Kazuyuki Hironaga, Tadahiro Sawada