Patent ID: 6104475
Filing Date: 2000-08-15
Classification: B41J,G03F,H04N

Abstract:
Apparatus for scanning a light-beam across a sheet mounted on a flat bed, the apparatus comprising a bridge that extends across the bed from one side to the other and is supported at each end on a carriage guided along a respective one of said sides of the bed, a scanning head that is supported on the bridge and moveable along the length of the bridge so as to scan along a direction perpendicular to the motion of the bridge, drive means at each end of the bridge to drive a respective carriage, location means at each end of the bridge to monitor the position of each carriage along a respective one of said sides, and control means to control operation of each drive means in accordance with information of the position of the respective carriage driven by the drive means, as determined by the respective location means, so that both ends of the bridge are moved simultaneously in relation to one another.