Patents by Inventor Fred Dankert

Fred Dankert 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).

  • Pressure-sensitive tacky printing roller for removing printing inks from a printing plate
    Patent number: 5495801
    Abstract: A printing roller, or form roller, having sufficient pressure-sensitive tack for cleanly removing ink from non-image areas of a waterless planographic plate irrespective of the tackiness of the ink. The roller can be fabricated with the necessary pressure-sensitive tack by disposing a coated sleeve, or coating layer, upon the peripheral surface of a standard roller base. The surface of the coating is elastomeric. Elastomers that will work with this invention can be selected from a group consisting of: butyl rubber, nitrile rubber, styrene butadiene, polychoroprene, polysulfide, polyurethane, polyolefin, polyvinyl acetate, acrylics, gelatine/aldehyde, epoxies, and combinations thereof.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: March 5, 1996
    Inventor: Fred Dankert
  • Fabrication of waterless planographic plates by laser printing and xerographic methods
    Patent number: 5455134
    Abstract: The present invention pertains to planographic plates fabricated with a silicone coating which produces economical and durable waterless plates, when the coating is applied to plates imaged by xerographic toner, cured and allowed to properly develop. Such a plate has a very high resolution and an excellent ink repellency in the non-print zones. The process of the invention applies the silicone coating directly onto a plate imaged by laser printing, curing the silicone and then applying a solvent (developer) which penetrates through the silicone to the image. The imaging material is removed precisely, leaving a silicone stencil only in the desired, non-print areas. The silicone coating attaches directly to the base metal (aluminum oxide), producing a very durable coating having low, free-surface energy.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: October 3, 1995
    Inventor: Fred Dankert
  • Waterless planographic plates
    Patent number: 5370906
    Abstract: The present invention features planographic plates fabricated with a silicone coating which produces economical and durable waterless plates when the coating is applied to imaged plates, cured and allowed to properly develop. Such a plate has a very high resolution and an excellent ink repellency in the non-print zones. The process of the invention applies the silicone coating directly onto a photo-imaged or a non-photo-imaged plate, curing the silicone, and then applying a solvent (developer) which penetrates through the silicone to the image. The imaging material is removed precisely, leaving a silicone stencil only in the desired, non-print areas. The silicone coating attaches chemically to the base metal (aluminum oxide), which produces a very durable coating.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: December 6, 1994
    Inventor: Fred Dankert