Patent ID: 7738801
Filing Date: 2010-06-15
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a developing device; a replaceable developing material container that contains developing material; a coupling member that couples the developing device to the developing material container; a controller that, when the developing material container is attached and an installation sequence to fill the coupling member with developing material is performed, calculates a value obtained by performing an operation to calculate replacement time of the developing material container, on a developing material amount obtained by subtracting a developing material amount filled in the coupling member from a developing material amount contained in the attached developing material container; a ratio storage unit that holds a ratio for calculation of the replacement time of the developing material container, wherein the controller calculates the replacement time of the developing material container based on the ratio stored in the ratio storage unit; and a display that displays information indicating the replacement time of the developing material container based on the value calculated by the controller.