A device is provided for transporting, in a stepwise manner, tape between a feed reel and takeup reel. An indexer moves across the normal path of the tape displacing it while the tape on the takeup reel side of the indexer is braked. After displacement, the takeup reel takes up the displaced tape while...http://www.google.es/patents/US4144454?utm_source=gb-gplus-sharePatente US4144454 - Tape transport mechanism
