Patents by Inventor David A. Leeman

David A. Leeman 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).

  • Patent number: 5783042
    Abstract: A method and system of measuring deflected doctor blade angle and loading force of an arrangement including a doctor apparatus operating in connection with a rotating cylinder, the apparatus having a doctor blade and a support member which pivots about at least one pivot point in response to an externally applied force for applying the doctor blade to a contact point on the cylinder. The arrangement corresponds to a kinematic model of linkages including a first link defined between the at least one pivot point and the contact point, a second link defined between the contact point and the center of the cylinder, and a third link defined between the center of the cylinder and the at least one pivot point.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: July 21, 1998
    Assignee: Thermo Web Systems, Inc.
    Inventors: David A. Leeman, Steven J. Coleman, David J. Dziadzio, William K. Giguere, Ronald F. Goodnow
  • Patent number: 5303484
    Abstract: A convective dryer for drying a moving coated web has at least one module arranged on one side of the path of web travel. The module includes a housing subdivided into a first chamber opening towards the path of web travel and a second adjacent enclosed chamber. Mutually spaced nozzle assemblies extend laterally across the path of web travel within the first chamber. The nozzle assemblies are connected by a supply duct to air heating and recirculating components in the second chamber. The supply duct gradually diverges in width from a narrow inlet section communicating with the second chamber to a widened delivery end communicating with the nozzle assemblies at the approximate center of the path of web travel.
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: April 19, 1994
    Assignee: Thermo Electron Web Systems, Inc.
    Inventors: Kenneth G. Hagen, David A. Leeman