Patents by Inventor Robert Doldon Childress

Robert Doldon Childress 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).

  • Angled air impingment system for document control
    Patent number: 6305772
    Abstract: A document-endorse arrangement has a document transport mechanism wherein documents are advanced down a track past one or more print stations where a jet-print nozzle array projects an ink stream to the document. One or more angled air streams arise from the track. Each air stream is directed downstream of the track at an acute angle of approximately 20 degrees with respect to the track. At least one of the airstreams is upstream of the nozzles and is adapted to pneumatically float each document past the nozzles so as to maintain a prescribed gap between the document and both the track and nozzles. This inhibits contamination of the nozzle from surplus ink and dust.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: October 23, 2001
    Assignee: Unisys Corporation
    Inventors: Kenneth Richard Berkoben, Robert Doldon Childress, Sammy Cline Hutson, Carl Raymond Lohrmann, Robert Timothy Rourke, Ronald Lynn Upton