Patents by Inventor Alan L. Shobert

Alan L. Shobert 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).

  • Precurled flexographic printing plate
    Patent number: 4478931
    Abstract: A permanent curl is provided in flexographic printing plates comprising a flexible sheet support and a photosensitive layer of a photopolymerizable elastomeric composition having a dry thickness of about 0.005 to 0.250 inch wherein after liquid development the printing plate is dried, 20.degree. to 80.degree. C. for at least 0.25 hour, and is postexposed by overall actinic radiation exposure for 1 to 30 minutes, at least the postexposure occurring while the printing plate is present on a curved surface, e.g., a printing cylinder. The process is useful for rubber and block copolymer-containing printing plates.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: October 23, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael G. Fickes, Alan L. Shobert