Patents Assigned to P.M. Plasmatic (Leicester) Limited
  • Valve cap tamper-proof cover
    Patent number: 4457445
    Abstract: The invention relates to a pilfer-proof cap, for example for a beer container, which comprises two shell portions (4,6) connected by a hinge (8) incorporating a tear-strip, and capable of being secured around the valve of the container by a non-releasable fastening means (14,16). When authorized opening of the container is required, the tab (12) of the tear-strip is pulled away from the cap and releases the valve for use.
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: July 3, 1984
    Assignee: P.M. Plasmatic (Leicester) Limited
    Inventors: Robert S. Hanks, Philip H. Brodrick