Patents by Inventor Robert Naismith

Robert Naismith 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).

  • Injection moulding apparatus
    Patent number: 5198232
    Abstract: A mould for an injection moulding apparatus, the moulding including at least two mould parts which mate to form the mould cavity and which separate to permit removal of the moulded article, each mould part including a relatively rigid body having an abutment face which abuts with an abutment face of the other mould part when said parts mate, the body of at least one mould part including a recess in its abutment face which is filled with a resilient material defining a portion of said mould cavity.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: March 30, 1993
    Assignee: Games Workshop Limited
    Inventors: John B. Thornthwaite, Robert Naismith
  • Injection moulding process
    Patent number: 5151232
    Abstract: A mould for an injection moulding apparatus having two resilient mould inserts mate to form a mould cavity and which separate to permit removal of the moulded article. Each mould insert being inserted into opposed movable mould parts such that they abut to form the mould cavity before the movable mould parts abut one another. A process for forming the mould inserts by pressing bodies of mouldable material together around an article and curing the material to form the inserts.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: September 29, 1992
    Assignee: Games Workshop Limited
    Inventors: John B. Thornthwaite, Robert Naismith
  • Injection moulding apparatus
    Patent number: 5013228
    Abstract: A mould for an injection moulding apparatus, the mould including at least two mould parts which mate to form the mould cavity and which separate to permit removal of the moulded article, each mould part including a relatively rigid body having an abutment face which abuts with an abutment face of the other mould part when said parts mate, the body of at least one mould part including a recess in its abutment face which is filled with a resilient material defining a portion of said mould cavity.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: May 7, 1991
    Assignee: Games Workshop Limited
    Inventors: John B. Thornthwaite, Robert Naismith