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Color Imaging Receives Print Head Patent for High-Speed Digital Printing

Press release from the issuing company

ATLANTA, May 22, 2002 -- Color Imaging, Inc. reports that Patent Number 6,386,684, Curved Print Head for Charged Particle Generation, has been issued to Michael W. Brennan, Color Imaging's Chairman and CEO, and William G. Read, Ph.D., a technical advisor to the Company and a Principal Scientist at the California Institute of Technology's Jet Propulsion Laboratory. The issued patent relates to an improved Electron Beam Imaging ("EBI'') print head for digital high-speed printing or image generation. EBI is a well-established digital printing process, known as electrography, and competes with laser printing but at much higher print rates. EBI print heads are the basis of the technology, are currently only available from Delphax Systems (Mississauga, Canada) and represent a significant cost component as a consumable product required for electrographic printing. A typical EBI print head has longevity of 150,000 pages and, at print rates of 300 pages-per-minute, is usually replaced after each shift of production printing. The Company reported that pre-production units have printed thousands of pages with both black and color toners achievingexcellent quality and expect the life of production print heads to meet or exceed that of products that are currently purchased elsewhere. Alan Spatz, the Company's Director of Operations, remarked that, "This product, once in production, is exceedingly important as hundreds of EBI print heads are consumed every month by our user base and will significantly increase our added value. Following our earlier patent for process color toners, U. S. Patent Number 5,834,150, this patent underscores our commitment to EBI technology.'' Spatz further added, "The improved EBI print head implementation is quite simple, basically a multi-layer printed circuit board whose novel curved surface conforms to the radius of the imaging cylinder and generates charges, or dots, on the imaging drum of a uniform size at print resolutions of 300 or 600 dots-per-inch. Earlier EBI print heads used a flat print head surface to generate the electrostatic image on an imaging cylinder and, because of the differing surface aspects, flat print head surface and curved imaging cylinder, generated dots of varying sizes.''