Patent ID: 7736077

Claim:
An ink ribbon cartridge, comprising: housing means for rotatably supporting a take-up shaft and a supply shaft, the housing means being attachable/detachable relative to an image forming device; a first supply shaft connecting means for connecting one end of the supply shaft to the housing means; a second supply shaft connecting means for connecting another end of the supply shaft to the housing means; a first take-up shaft connecting means for connecting one end of the take-up shaft to the housing means; a second take-up shaft connecting means for connecting another end of the take-up shaft to the housing means; and the first supply shaft connecting means including a back tension applying means for applying a back tension to the supply shaft, the back tension applying means comprising: a resistance generating member; and an urging means substantially inside an internal space of the first supply shaft connecting means, the urging means urging an inner surface of a resistance generating member closer to the outer surface of the housing means.