Patent attributes
A scanner has a transport system for transporting a document along a transport path for scanning by at least a first camera. A first removable image guide is disposed between the first camera and a first side of the document. The first removable image guide has a first manifold with a first patter of holes for applying a first level of air pressure or vacuum to the document. Replacement of the first removable image guide with an upgrade removable image guide provides an alternate manifold with an alternate pattern of holes that provide a second level of air pressure or vacuum to the document, different from the first level.