Patents Assigned to Anspack, Inc.
  • Threaded bottle lid
    Patent number: 4231480
    Abstract: A lid for closing a wide mouth bottle has a sealing disc with a depending peripheral skirt. The skirt has an internal helical thread which takes the cross-sectional form of an elongated trapezoid tilted toward the sealing disc. The thread is formed of a flexible material for being deflected away from the disc and wedged against the neck of the bottle by the threads on the neck as the lid is tightened on the bottle.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: November 4, 1980
    Assignee: Anspack, Inc.
    Inventor: George B. Spransy