Patents Examined by Stpehen R. Funk
  • Lithographic printing plates for use with laser-discharge imaging apparatus
    Patent number: 5339737
    Abstract: Lithographic printing plates suitable for imaging by means of laser devices that emit in the near-infrared region. Laser output either ablates one or more plate layers or physically transforms a surface layer, in either case resulting in an imagewise pattern of features on the plate. The image features exhibit an affinity for ink or an ink-abhesive fluid that differs from that of unexposed areas.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: August 23, 1994
    Assignee: Presstek, Inc.
    Inventors: Thomas E. Lewis, Michael T. Nowak, Kenneth T. Robichaud, Kenneth R. Cassidy