Patents by Inventor Roy J. Issa

Roy J. Issa 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).

  • Inverse symmetrical variable crown roll and associated method
    Patent number: 6119500
    Abstract: The method and apparatus of the present invention is a rolling mill having rolls with inverse symmetrical profiles and a method of using the same. An inverse symmetrical profile is a profile in which the right and left sides of a roll, with respect to the roll center line, have the profiles that are described by the same polynomial function but with opposite signs. A family of metal strip profiles can be created by the method and apparatus of the present invention wherein the family of strip profiles created prior to roll shifting are strip profiles expressed by polynomial functions having terms of the n.sup.th order, where n is preferably 1-5 inclusive, and the family of strip profiles produced by shifting at least one upper roll having an inverse symmetrical profile and at least one lower roll having an inverse symmetrical profile are strip profiles expressed by polynomial functions having terms of the (n-1).sup.th order, where n is preferably 1-5, inclusive.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: September 19, 2000
    Assignees: Danieli Corporation, International Rolling Mill Consultants, Inc.
    Inventors: Vladimir B. Ginzburg, Roy J. Issa