Patents by Inventor Erling C. Normann

Erling C. Normann 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).

  • Machine for adjustable longitudinal corrugating of sheet materials
    Patent number: 4875354
    Abstract: A machine for adjustable longitudinal corrugating of sheet materials, particularly of metal with stepwise folding/bending over free-running rollers and counter-rollers, so that alternating longitudinal convex and concave corrugations are formed. At each profiling step there are upward and downward forming rollers (47) which can be individually adjusted laterally to the direction of corrugation. Separate from the forming rollers there are at least one set of drive rollers (60) and counter-rollers (37) where both the drive rollers and the counter-rollers can be adjusted laterally to the direction of corrugation.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: October 24, 1989
    Inventors: Trond Nilsen, Erling C. Normann