A high performance magnetic tape transport and tape cartridge. The cartridge includes coplanar hubs carrying tape rolls on fixed axes, a brake system which urges each hub in a direction to tension the tape when the cartridge is removed from the transport, and a pair of doors which completely enclose...http://www.google.de/patents/USRE30448?utm_source=gb-gplus-sharePatent USRE30448 - Tape recorder system
