Patents by Inventor Jean R. Crahay

Jean R. Crahay 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 for producing a metal product having improved lustre after painting
    Patent number: 5044076
    Abstract: A metal product, such as cold rolled steel sheet, has a surface comprising a plurality of flat, smooth facets which are preferably 50 to 200 .mu.m across and which make up at least 30% of the area of said surface. The facets may be formed either by pressing a network of valleys in a flat, smooth surface or by flattening the peaks of a rough surface.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: September 3, 1991
    Assignee: Centre de Recherches Metallurgiques--Centrum voor Research in de Metallurgie
    Inventors: Jean R. Crahay, Adolphe A. Bragard
  • Metal product having improved luster after painting
    Patent number: 4917962
    Abstract: A metal product, such as cold rolled steel sheet, has a surface comprising a plurality of flat, smooth facets which are preferably 50 to 100 .mu.m across and which make up at least 30% of the area of the surface. The facets may be formed either by pressing a network of valleys in a flat, smooth surface or by flattening the peaks of a rough surface.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: April 17, 1990
    Assignee: Centre de Recherches Metallurgiques-Centrum VOOR Research in de Metallurgie
    Inventors: Jean R. Crahay, Adolphe A. Bragard
  • Method of improving the state of the surface of a roll
    Patent number: 4628179
    Abstract: A method for treating the surface of a roll, e.g. for a rolling mill, by focusing a substantially continuous concentrated corpuscular beam, e.g. a laser beam or an electron beam, on the roll surface, guiding the beam to impinge on the roll surface in a helical path, and regulating the concentration of the beam, the relative speed of rotation of the roll, and the translation speed of the beam so that the ratio of the pitch of the helical path and the width of the path of the beam on the roll surface is less than 1.
    Type: Grant
    Filed: February 28, 1984
    Date of Patent: December 9, 1986
    Assignee: Centre de Recherches Metalurgiques-Centrum Voor Research in de Metallurgie
    Inventor: Jean R. Crahay
  • Regulating surface treatment by laser beam
    Patent number: 4536639
    Abstract: A laser beam is focused as a cone whose apex is to be located on the surface of a part to be treated. A reference distance between the surface and a given point of the focusing element is determined, at which the apex is located on the surface. The actual distance between the surface and the given point is measured and the difference between the actual distance and the reference distance is determined. The focusing element is displaced so that the difference determined is cancelled.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: August 20, 1985
    Assignee: Centre de Recherches Metallurgiques Centrum Voor
    Inventor: Jean R. Crahay