Patent ID: 7050741

Claim:
An imaging apparatus comprising: an image carrier that is adapted to form a latent image; a charge unit that is adapted to charge the image carrier; a developing unit that is adapted to develop the latent image formed on the image carrier with toner to form a toner image; a transfer unit that is adapted to conduct at least one of a process of directly transferring the toner image onto a recording medium that is carried by a transfer belt, and a process of transferring the toner image onto the transfer belt and then transferring the toner image onto the recording medium from the transfer belt; and a cleaning unit including a cleaning blade and a brush roller; wherein an average roundness Ψ of the toner is within a range of 0.93˜0.99; and a friction coefficient μs of the image carrier satisfies a condition, friction coefficient μs ≦3.6−3.3×average roundness Ψ.