Patents by Inventor Frederick D. Rotar

Frederick D. Rotar 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).

  • Metal impregnated dryer fabric
    Patent number: 4251928
    Abstract: A dryer fabric impregnated with metallic particles so as to increase the thermal conductivity of the fabric and also reduce its emissivity. The dryer fabric is a woven fabric having a plurality of interstices between its warp and weft yarns. By coating the fabric with a synthetic resin mixture containing metallic particles, such as aluminum particles, the interstices are substantially filled with metallic particles thereby improving the thermal properties of the fabric.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: February 24, 1981
    Assignee: Asten Group Inc.
    Inventors: Frederick D. Rotar, Clement B. Edgar, Jr.
  • Coating of papermaking fabrics
    Patent number: 4172910
    Abstract: A process for treating papermaking fabrics, in particular dryer fabrics, includes coating the back surface of the fabric with a thickened resin mixture. To reduce the air permeability of a woven dryer fabric, the fabric is impregnated with a thickened resin mixture to thereby close up a portion of the spaces between the woven yarns. By applying a thickened resin mixture having a viscosity of between 1,000 and 5,000 centipoise to the back surface of the dryer fabric, the fabric is impregnated in a single pass with a sufficient quantity of the mixture to thereby reduce the air permeability to the desirable level.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: October 30, 1979
    Assignee: Asten Group, Inc.
    Inventor: Frederick D. Rotar