Patents by Inventor Paul E. Plasscheart

Paul E. Plasscheart 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).

  • Duplex printing device
    Patent number: 4879571
    Abstract: The invention provides apparatus for coupling a pair of imaging units to receive paper along a first path from a first unit, and to invert and transfer the paper along a second path entering the second unit. Embodiments include one which in addition to inverting the paper provides an alternative path for paper so that the paper passes through one imaging unit only, and one which allows paper to pass through one or the other of the imaging units selectively.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: November 7, 1989
    Assignee: Delphax Systems
    Inventor: Paul E. Plasscheart