Patent ID: 8081892

Claim:
An image forming apparatus, comprising: a first transfer belt to which an image formed on a surface of a photoconductive body is transferred, disposed to form a circle path; a first drive section to rotate the first transfer belt; a first detection section to detect a position of the first transfer belt in a width direction; a first moving section to move the first transfer belt in the width direction; a second transfer belt disposed to form a circle path in pressure contact with the first transfer belt to transfer a toner image on the first transfer belt onto a recording sheet by pressing the recording sheet between the first transfer belt while the recording sheet is passing between the first and second transfer belts; a second drive section to rotate the second transfer belt; a second detection section to detect a position of the second transfer belt in a width direction; a second moving section to move the second transfer belt in the width direction; a pressure contact switching section to switch between a pressure contact state in which the first transfer belt and the second transfer belt are in pressure contact and a separating state in which the belts thereof are separated; and a control section to control the pressure contact switching section, conduct a correction control where biases of the first transfer belt and the second transfer belt are corrected by controlling an operation of the first moving section and the second moving section in accordance with detected results of the first and the second detection sections, and change the correction control for at least one of the first moving section or the second moving section in accordance with whether the first belt and the second belt are in the pressure contact state or in the separating state.