In a printer, when a cover is closed, a paper issuing path, and a paper setting path are formed downstream from a cutter mechanism in a paper transport path. The paths are switched over by a movable guide. During a normal printing process, the movable guide is swung by its own weight to close the paper...http://www.google.es/patents/US7404683?utm_source=gb-gplus-sharePatente US7404683 - Printer