Patent ID: 8369767

Claim:
An electrophotographic printer in which a toner image formed by a developing unit on a photoconductor drum is transferred via a transfer roller onto a recording medium and a surface of the transfer roller having the image transferred thereto is cleaned by a transfer roller cleaning device, characterized in that the printer comprises: a carrier liquid supply unit disposed at a portion of the circumference of the transfer roller between a position of the image transfer onto the recording medium and said transfer roller cleaning device and including a carrier liquid supply roll rotating in the same direction with respect to and in rotational contact with the surface of the transfer roller for supplying a carrier liquid onto a surface of the transfer roller, and that said transfer roller cleaning device comprises: a cleaning roll rotating in the same direction with respect to and in rubbing contact with the surface of the transfer roller and having a bias voltage applied thereto which is of a polarity opposite to that of residual toner on the surface of the transfer roller; a peripheral surface scraping blade positioned downstream of said cleaning roll in the rotation direction of the transfer roller and in contact with a transfer surface of the transfer roller, the transfer surface being a peripheral curved surface of the transfer roller that transfers the toner image to the recording medium; an end surface scraping blade likewise positioned downward and in contact with an end surface of the transfer roller, the end surface of the transfer roller being a flat surface perpendicular to the transfer surface that transfers the toner image to the recording medium; a surface scraping blade disposed at a portion of the circumference of said cleaning roll and in contact with a surface of said cleaning roll; and urging mechanisms each of which has a spring plunger to urge each of the cleaning roll and the peripheral surface scraping blade of said transfer roller cleaning device, each of urging forces of said urging mechanisms being adjustable.