Patents Assigned to John Birka
  • Self-sealing bottle assembly and method for manufacture thereof
    Patent number: 4125200
    Abstract: A self-sealing bottle assembly and method of manufacture comprising a glass bottle having an open neck, an annular resilient neck seal disposed on an internal shoulder adjacent the neck opening, a cap of thermosetting plastic material shrink fitted onto the bottle neck to hold the annular seal firmly against the neck shoulder, and a glass sphere captured within the bottle and adapted for internal pressure-sealing engagement with the annular seal.
    Type: Grant
    Filed: January 12, 1978
    Date of Patent: November 14, 1978
    Assignee: John Birka
    Inventor: Chester W. Manley