Patents by Inventor Francis J. De Keyzer

Francis J. De Keyzer 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).

  • Photographic exposure apparatus including a means for the relative positioning of a photographic material and an original in sheet form
    Patent number: 4897689
    Abstract: A photographic exposure apparatus comprising a support serving as a carrier for sheet material which is an original, or a photographic material, or is an original together with a photographic matrial; and a translucent positioning sheet for covering at least partially said support and which is adapted to engage a corner of said sheet material, characterized in that said translucent positioning sheet is provided with a pair of locating means spaced apart from each other so as to engage two neighbouring corners of said sheet material, whereby said sheet material may be located in a predetermined position, the said positioning sheet being attached to the said support.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: January 30, 1990
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Francis J. De Keyzer, Jean P. Moelants