A scanner has a frame assembly including a carriage movably mounted in the frame assembly for scanning movement in a scanning path in a first direction along the length of the frame assembly, the frame assembly includes at least one sheet transport path with an indexer to index a sheet through the path;...http://www.google.fr/patents/US5245447?utm_source=gb-gplus-shareBrevet US5245447 - Indexing mechanism for compact scanner
