Patents by Inventor Stuart M. Simpson

Stuart M. Simpson 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).

  • Bed warmer
    Patent number: 4984316
    Abstract: The present invention relates to a generally flat bed warmer which is formed from a flexible, non-porous material. The bed warmer is inserted beneath or between the sheets of a bed for heating up the same. An inlet is defined in the flexible, impervious envelope so that the envelope can be coupled to and inflated by a source of hot air. The heat from the hot air in the bed warmer is transferred to the bed linens through the wall of the envelope. Furthermore, a plurality of apertures are defined through at least one wall of the bed warmer so as to allow controlled leakage of hot air from the bed warmer.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: January 15, 1991
    Inventors: Stuart M. Simpson, Peter Garth, Jonathan Richards
  • Processing of exposed lithographic printing plates by conducting second exposure under water
    Patent number: 4927741
    Abstract: The invention relates to an automatic machine for the reversal processing of lithographic printing plates which are required to be exposed overall after heating. The method and apparatus of the invention provide that the exposure be effected while the plates are being conveyed through water in a shallow bath.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: May 22, 1990
    Assignee: Horsell Graphic Industries Limited
    Inventors: Peter Garth, Stuart M. Simpson, John E. Parkinson, Alan H. Rogers