Patents by Inventor Robert John Duncan

Robert John Duncan 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).

  • System for dispensing and controlling the temperature of hot melt adhesive
    Patent number: 4059204
    Abstract: In a hot melt adhesive dispensing gun, an electronic circuit is constructed to enable the operator to set a desired temperature to which the glue is heated. This set point is automatically raised a predetermined amount when the glue is flowing in order to compensate for the drop in temperature caused by the loss of heat to the glue and atmosphere.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: November 22, 1977
    Assignee: USM Corporation
    Inventors: Robert John Duncan, Richard Montgomery Elliott