Patents by Inventor Kazumasa Koyabashi

Kazumasa Koyabashi 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 manufacturing fluorescent lamp
    Patent number: 6568217
    Abstract: A method for manufacturing a fluorescent lamp that can achieve stable luminous characteristics and discharge characteristics and also does not suffer from cracks in the interconnected portion of the glass tubes while handling or lighting the fluorescent lamp is provided. Interconnecting portions located in the vicinity of open end portions of glass tubes that are positioned adjacent to each other are heated respectively from inside to form a welding portion, and then, the glass tubes are thrust against each other and thinned by conducting a preliminary tapping of the welding portion from inside using hammers. Next, the welding portion is opened by conducting a main tapping to form an interconnected portion, and end portions in the vicinity of the interconnected portion are closed by heating and melting, and then the end portions are molded.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: May 27, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuyoshi Sudou, Masahiro Takeuchi, Kazumasa Koyabashi
  • Method for manufacturing fluorescent lamp
    Publication number: 20020026812
    Abstract: A method for manufacturing a fluorescent lamp that can achieve stable luminous characteristics and discharge characteristics and also does not suffer from cracks in the interconnected portion of the glass tubes while handling or lighting the fluorescent lamp is provided. Interconnecting portions located in the vicinity of open end portions of glass tubes that are positioned adjacent to each other are heated respectively from inside to form a welding portion, and then, the glass tubes are thrust against each other and thinned by conducting a preliminary tapping of the welding portion from inside using hammers. Next, the welding portion is opened by conducting a main tapping to form an interconnected portion, and end portions in the vicinity of the interconnected portion are closed by heating and melting, and then the end portions are molded.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 7, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuyoshi Sudou, Masahiro Takeuchi, Kazumasa Koyabashi