A ribbon cartridge includes a cartridge housing, a supply spool, a take-up spool, and a supply of ribbon. The cartridge housing includes a supply spool enclosure, a take-up spool enclosure, a pair of ribbon guides, and a gap between the ribbon guides and the supply and take-up spool enclosures. The supply...http://www.google.de/patents/US7018117?utm_source=gb-gplus-sharePatent US7018117 - Identification card printer ribbon cartridge
