Patents by Inventor John Van der Kruik

John Van der Kruik 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).

  • Patent number: 4912517
    Abstract: The present invention provides improved method and apparatus for a high-volume projector and rotary xerographic processor. The unique apparatus produces dry, permanent positive copies from continuous fed microfilm which can be reproduced on plain paper continuous feed rolls at a rate of at least 52 feet per minute. Accordingly, the inventive apparatus and methods minimize the occurrence of blurred images through monitoring system which regulate microfilm transport providing alignment, precise, reflective optics and avoid "ripple effects" commonly associated with relatively high speed systems.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: March 27, 1990
    Assignee: Micro-50, Inc.
    Inventors: Robert Alkema, John Van der Kruik