Patents by Inventor Harry Russell Farwell

Harry Russell Farwell 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).

  • Stencilling apparatus with flow through print and flow action
    Patent number: 4051777
    Abstract: Stencilling apparatus having a print and flow action relative to a combination squeegee and flow coater assembly, wherein excess stencilling fluid ahead of the squeegee can flow through the assembly, by flow over the squeegee into a control reservoir behind the squeegee and ahead of the trailing flow coater, and a controlled layer of the fluid flows from the reservoir beneath the lower edge of the flow coater onto the underlying stencil screen.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: October 4, 1977
    Assignee: James A. Black
    Inventors: James A. Black, Harry Russell Farwell, Frank L. Porth
  • Web slit registry
    Patent number: 3973492
    Abstract: Slit registry apparatus and method for registry of flexible, generally planar stock as for stencilling thereon, involving formation of periodic transverse slits and adjacent edges in the stock, at least one of the edges and the adjacent stock zone or area being offset from the plane of the stock for engagement of this offset edge by a registration surface.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: August 10, 1976
    Assignee: James A. Black
    Inventors: James A. Black, Harry Russell Farwell
  • Web stencilling and drying apparatus
    Patent number: 3973493
    Abstract: Web stencilling and drying apparatus for web stock with at least one intermittent feed stencilling station and slit registry means for stock therefor, a continuous feed ultraviolet drying station, and first and second dynamic flow pressure differential web controllers upstream and downstream of the ultraviolet drying station, the first one including sensors responsive to the length of the web loop therein to control web intermittently fed thereto and continuously fed therefrom.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: August 10, 1976
    Assignee: James A. Black
    Inventors: James A. Black, Harry Russell Farwell
  • Flood coater and squeegee with viscosity sensing and control
    Patent number: 3973491
    Abstract: A stencilling printer with a flow coater specially mounted to sense viscosity of stencil fluid flowing from a reservoir between the flow coater and the squeegee, the flow coater being shiftable and operably associated with a supply of viscosity-altering liquid for controllably altering the viscosity of stencil fluid in the reservoir.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: August 10, 1976
    Assignee: James A. Black
    Inventors: Frank L. Porth, James A. Black, Harry Russell Farwell