Patents by Inventor Charith A. Gunawardena

Charith A. Gunawardena 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: 5020675
    Abstract: Apparatus for sorting articles having a roller conveyor for moving articles through an inspection region where they are scanned by a camera. From the scans, the position of boundaries of the articles is determined so that the existence and location of the articles can be identified. Color counts, representative of the color of the articles are made from the scans and are correlated with the appropriate article identified. Load cells produce weight information which is similarly correlated with the appropriate articles. The information is fed to a processor which is arranged to track the articles through the inspection region and is arranged to route the articles differently in accordance with the color counts and/or weight information correlated therewith.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: June 4, 1991
    Assignee: Lockwood Graders (UK) Limited
    Inventors: Simon Cowlin, Leslie Clark, Timothy Dennis, Charith Gunawardena
  • Patent number: 4940536
    Abstract: The invention is a device for sorting food products such as vegetables or fruit in accordance with their size, weight, and color or the presence of defects on them. In accordance with the device of the invention, a conveyor in the form of a plurality of rotatable rollers is employed for supporting the articles to be inspected and sorted. The articles are passed through an inspection zone where the articles are scanned in accordance with the sorting criteria of the apparatus. The articles are then sorted in accordance with in response to the determinations made at the inspection zone.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: July 10, 1990
    Assignee: Lockwood Graders (U.K.) Limited
    Inventors: Simon Cowlin, Leslie J. Clark, Timothy J. Dennis, Charith A. Gunawardena