Image forming apparatus including controller capable of determining whether developing cartridge, drum cartridge and belt unit are reached their lifetimes
AssigneeBrother Kogyo Kabushiki Kaisha
InventorTadao Kyotani
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a developing cartridge, a main memory and a controller. The controller is configured to perform determining whether the developing cartridge is reached a lifetime on a basis of: at least one of s developing maximum printable number of sheets which corresponds to developing identification information, a maximum developing roller rotation number which corresponds to the developing identification information, and a maximum dot count which corresponds to the developing identification information; and at least one of a developing cumulative number of printed sheets, a cumulative developing roller rotation number and a cumulative dot count.
Claims6
A developing cartridge comprising:
- a developing roller;
- and
- a developing memory having:
- a developing storage area storing therein a developing identification information which identifies a specific type of the developing cartridge, the developing storage area being configured to store therein a developing roller rotation number corresponding to a number of times the developing roller rotates when printing is performed, and a dot count corresponding to a number of dots printed,
- wherein whether the developing cartridge is reached a lifetime is determinable, at least in part, on a basis of the developing roller rotation number and the dot count.
Dependencies are inferred from the claim text.