Patents by Inventor Daniel Francis Sheehan, Jr.

Daniel Francis Sheehan, Jr. 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).

  • Methods and apparatus for forming cylindrical photosensitive elements
    Patent number: 5916403
    Abstract: The present invention relates to methods and apparatus for forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves. The apparatus for forming a seamless cylindrical photosensitive element of uniform thickness on a flexible sleeve, comprises a mandrel, a mandrel support assembly, a calendering assembly, a drive system and at least a heating element. The methods comprise forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves from a stream of molten photopolymerizable material, or a solid or molten sheet of photopolymerizable material. The seamless cylindrical photosensitive elements are formed on polyester sleeves for use on a printing cylinder.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: June 29, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Stephen Cushner, Roxy Ni Fan, Edward Andrew Calisto, Daniel Francis Sheehan, Jr.
  • Methods and apparatus for forming cylindrical photosensitive elements
    Patent number: 5798019
    Abstract: The present invention relates to methods and apparatus for forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves. The apparatus for forming a seamless cylindrical photosensitive element of uniform thickness on a flexible sleeve, comprises a mandrel, a mandrel support assembly, a calendering assembly, a drive system and at least a heating element. The methods comprise forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves from a stream of molten photopolymerizable material, or a solid or molten sheet of photopolymerizable material. The seamless cylindrical photosensitive elements are formed on polyester sleeves for use on a printing cylinder.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: August 25, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Stephen Cushner, Roxy Ni Fan, Edward Andrew Calisto, Daniel Francis Sheehan, Jr.