Patents by Inventor Willard C. Notbohm

Willard C. Notbohm 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).

  • Headbox with variable eddy decay length
    Patent number: 3972771
    Abstract: A paper machine headbox in which the ideal distance or eddy decay length may be varied to provide improved formation and tensile ratio for different grades and types of paper. The slice for the headbox is defined by a pivotally mounted nozzle blade and an apron blade, and one of the blades is mounted for sliding movement toward and away from the other. With this construction, the effective flow area through the flow channel to the slice may be varied, thereby varying the velocity of the paper making stock delivered to the slice and the ideal distance or eddy decay length.
    Type: Grant
    Filed: February 28, 1974
    Date of Patent: August 3, 1976
    Assignee: The Black Clawson Company
    Inventor: Willard C. Notbohm