Method and apparatus for assembling sheets of printing media for booklets. In one aspect of the sheets are folded, sheet-by-sheet, and in another aspect the sheets are collected, sheet-by-sheet, and registered on a fold in each sheet. In still another aspect printed sheets are located, sheet-by-sheet,...http://www.google.es/patents/US6708967?utm_source=gb-gplus-sharePatente US6708967 - Method and apparatus for making booklets
