Image forming apparatus

摘要

An image forming apparatus including a main body, a photoconductive drum, a development cartridge including a development roller, a switching mechanism configured to switch between a contact state where the development roller and the photoconductive drum are in contact with each other, and a separate state where the development roller and the photoconductive drum are separated away from each other, and a controller configured to perform a preparatory mode to make preparations for forming a developer image on the photoconductive drum and transferring onto a transfer object the developer image formed on the photoconductive drum, and during execution of the preparatory mode, rotate the development roller while maintaining the separate state between the development roller and the photoconductive drum.

主权项

1. An image forming apparatus comprising:
a main body; a photoconductive drum; a charger configured to charge the photoconductive drum; a development cartridge comprising:
a development roller, the development cartridge being detachably attached to the main body;a switching mechanism configured to switch between:
a contact state where the development roller and the photoconductive drum are in contact with each other; anda separate state where the development roller and the photoconductive drum are separated away from each other; a controller configured to:
perform a preparatory mode to make preparations for forming a developer image on the photoconductive drum and transferring onto a transfer object the developer image formed on the photoconductive drum; andduring execution of the preparatory mode, rotate the development roller while maintaining the separate state between the development roller and the photoconductive drum; and a detected portion configured to, in conjunction with rotation of the development roller, irreversibly move from a new-unit position where the detected portion is when the development cartridge is new to a used-unit position where the detected portion is when the development cartridge is not new, wherein the main body comprises a detector configured to detect a movement of the detected portion from the new-unit position to the used-unit position, and wherein the controller is further configured to:
when the detected portion is in the new-unit position, place the switching mechanism in the separate state;after the detector detects movement of the detected portion from the new-unit position to the used-unit position, control the switching mechanism to switch from the separate state to the contact state; andafter the charger has charged the photoconductive drum, control the switching mechanism to switch from the separate state to the contact state.