20140079412 | DETERMINATION OF EFFECTIVE AMOUNT OF REMAINING LIFE OF TONER CARTRIDGE - An image forming system includes at least one toner cartridge, an image forming unit, and a cartridge life determination module. The toner cartridge may include toner and at least one component. The image forming unit may selectively form an image in one of a low coverage mode and a high coverage mode such that a greater amount of the toner is used in the high coverage mode than the low coverage mode in a formation of the respective image. The cartridge life determination module may determine an amount of remaining life of the toner, an amount of remaining life of the at least one component, and an effective amount of remaining life of the at least one toner cartridge based on the amount of remaining life of the toner and the amount of remaining life of the at least one component. | 03-20-2014 |