Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.p.

Won Chul Jung

Myung Ho Kyung

Gun Ho Kim

Byoung Chul Bae

An image forming apparatus and a method of controlling the same is provided. A plurality of cells formed at the surface of a transfer roller is filled with a developing agent to initialize the transfer roller, thereby suppressing contamination and electrical non-uniformity of the transfer roller. A method of controlling an image forming apparatus includes determining whether a transfer roller mounted in the image forming apparatus is a new one and, upon determining that the transfer roller is a new one, feeding a developing agent to the surface of the transfer roller and filling a plurality of cells formed at the surface of the transfer roller with the developing agent to initialize the transfer roller.

Image forming apparatus and method of initializing and cleaning a transfer roller therin

An image forming apparatus and a control method in which a power source having the same polarity as that of a transfer power source can be applied to a drive roller at a time at which an upper end of the recording medium is detached from the ITB, such that repulsive force against the recording medium can occur, and the detachment of the recording medium can be more easily carried out. Another power source having the opposite polarity to the transfer power source can be applied to the drive roller at another time at which the adhesive force between the back end of the recording medium and the ITB becomes weaker, such that attractive force drawing the recording medium to the ITB can occur and the recording medium can be brought into contact with the ITB with higher force.

Growing community of inventors

Gyeonggi-do, South Korea

Won Chul Jung