An image forming apparatus including a fixing device that has a rotatable endless belt, a contacting member to contact the rotatable endless belt, a rotatable pressing member contacting the contacting member via the rotatable endless belt to form a nip region, a heating member to heat the rotatable endless...http://www.google.com.au/patents/US7022944?utm_source=gb-gplus-sharePatent US7022944 - Image forming apparatus preventing excessive increase in temperature of fixing device
