An image input/output apparatus is capable of image printing and reading with simple controls, and a cartridge reads an original with a simple control. When a removable printhead or image reading head is attached to a common carriage to print an image on a print medium or read an original, a flip-flop...http://www.google.com.au/patents/US6353485?utm_source=gb-gplus-sharePatent US6353485 - Image input/output apparatus image input/output processing method and cartridge
