Patents by Inventor Douglas A. Stumpfl

Douglas A. Stumpfl 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).

  • Patent number: 5516549
    Abstract: A polyester-based coating composition capable of forming a striated pattern on a metal surface at a film thickness less than half of that of PVC plastisol films is provided by a thixotropic composition having a thix index of from about 1.5 to about 3 and comprising a hydroxy-functional polyester, a thixotropy-inducing rheologic agent and curing agent. The striated coating is applied to sheet metal in a coil coating operation by introducing the composition into a paint pan of a coil coater, transferring said composition from said paint pan to an applicator roll by rotating a pick-up roll in contact with the composition and with said applicator roll; continuously withdrawing a sheet of metal from a coil thereof and coating said sheet by contacting it with the applicator roll; curing the coating on said sheet by passing the sheet through an oven at an elevated temperature; and continuously rewinding said sheet into a coil.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: May 14, 1996
    Assignee: Morton International, Inc.
    Inventors: Kenneth E. Jasenof, Ronald J. Lewarchik, Douglas A. Stumpfl, David K. Black