Patent 7614737 was granted and assigned to Lexmark International, Inc. on November, 2009 by the United States Patent and Trademark Office.
A method for identifying an installed cartridge in a cartridge carrier of an imaging apparatus, wherein the imaging apparatus communicates with the installed cartridge over at least one line, includes sending an ID command to the installed cartridge via an ID line; and monitoring the ID line for an affirmative response from the installed cartridge, wherein the affirmative response over the ID line indicates that the installed cartridge is a perforator cartridge.