Patents Assigned to Wei K. Hsu
  • Impulse sealing apparatus
    Patent number: 4529472
    Abstract: This invention relates to an improved method and apparatus for impulse sealing thermoplastic materials in automatic form fill seal machines with separate applications of sealing, cutting and cooling.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: July 16, 1985
    Assignee: Wei K. Hsu
    Inventor: Wei K. Hsu