Patents by Inventor Willem J. Naarding

Willem J. Naarding 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).

  • Method and apparatus for quantitatively and qualitatively determining the dust content of fibrous material
    Patent number: 4084433
    Abstract: Method and apparatus for quantitatively and qualitatively determining the dust content of fibrous material, in which a representative sample of the fibrous material is opened to obtain individual fibers and release the dust contained therein. The individual fibers and fine dust are separated by a combination of gravity separation and air flow. Coarse dust is separated and collected incidental to the opening process. The dust quantity and quality are determined on a weight basis.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: April 18, 1978
    Assignee: Hergeth KG Maschinenfabrik und Apparatebau
    Inventor: Willem J. Naarding