A printing device for printing text, indicia, and images on a medium includes a housing that abuts a surface of the medium during a printing sequence and includes a print head which is moved from a starting position to an ending position during a printing sequence by a bidirectional first movement drive...http://www.google.com.au/patents/US6641313?utm_source=gb-gplus-sharePatent US6641313 - Motion control for multiple path raster scanned printer
