Patents by Inventor Leonard W. Sachi

Leonard W. Sachi 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).

  • Negative single sheet color proofing system based on aqueous developable photo-oligomers
    Patent number: 5248583
    Abstract: A photosensitive color proofing article comprising in the following order:a) a carrier layer,b) a release layer which acts as an oxygen barrier layer,c) a photopolymerizable layer comprising a multifunctional acrylate oligomer and a colorant,d) a photopolymerizable barrier layer, ande) a thermal adhesive layer.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: September 28, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Wallace R. Lundquist, Thomas P. Klun, Michael B. Heller, Leonard W. Sachi
  • Color proof with non-blocking thermal adhesive layer with particulate polymer beads
    Patent number: 4885225
    Abstract: Particulate organic polymeric beads in the thermal adhesive layer of prepress color proofing elements prevents adhesive blocking without optical interference or reduction in adhesive performance.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: December 5, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael B. Heller, Leonard W. Sachi, David R. Walbridge
  • Presensitized diazo color-proofing sheet with particular sized pigments
    Patent number: 4666817
    Abstract: A light-sensitive color-proofing sheet is described for producing an image on various substrates. A light-sensitive continuous color layer is releasably attached to a carrier. Overlaying the color layer is a water-insoluble transparent colorless barrier layer. On the opposite surface of the barrier layer is a thermally laminable adhesive layer. Upon lamination of the sheet to a substrate, removal of the carrier and exposure to actinic radiation, the color layer is formed into an image, photomechanically, by removal of the non-image areas.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: May 19, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Leonard W. Sachi