In bar code symbol scanning systems employing laser, optical and sensor components, mirrorless scanner arrangement mounts one or more of these components on a drive for repetitive reciprocating movement either about an axis or in a plane to effect scanning. The system has a movable exit port to permit...http://www.google.com/patents/US5367152?utm_source=gb-gplus-sharePatent US5367152 - Method of reading indicia from either side of scanner housing
