Patent ID: 7082281

Claim:
An electrophotographic printer comprising: a photosensitive drum on which an electrostatic latent image is formed; at least one development unit having a developing roller to form a toner image by supplying toner to the electrostatic latent image; and a pre-transfer erasing unit to remove charges from a non-image region of the photosensitive drum by irradiating light onto the photosensitive drum after the toner image is developed, the pre-transfer erasing unit comprising: a pre-transfer erasing lamp to irradiate light, and a pre-transfer erasing lens to induce the light generated from the pre-transfer erasing lamp to the photosensitive drum, movably installed such that it moves to an erasure position at which the pre-transfer erasing lens is close to the photosensitive drum to provide erasure, and to a retracted position spaced apart from the photosensitive drum so as not to interfere therewith when the photosensitive drum unit is being mounted or dismounted.