An ink cartridge has a supply core tube that supplies an ink sheet rolled around the supply core tube and a take-up core tube that takes up the ink sheet supplied from the supply core tube. The supply core tube and the take-up core tube are rotatably supported by a frame via supporting shafts provided...http://www.google.com.au/patents/US7450141?utm_source=gb-gplus-sharePatent US7450141 - Ink sheet cartridge
