Patent ID: 9091965
Filing Date: 2015-07-28
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a movable intermediary transfer member; a first photosensitive member contacting an outer surface of said intermediary transfer member to form a first nip: a second photosensitive member provided in a downstream direction of said first photosensitive member with respect to a moving direction of said intermediary transfer member and contacting the outer surface of said intermediary transfer member to form a second nip: a first transfer roller contacting an inner surface of said intermediary transfer member to form a first contact portion at a position away from the first nip in the downstream direction to transfer a toner image from said first photosensitive member onto said intermediary transfer member in the first nip; a second transfer roller contacting the inner surface of said intermediary transfer member to form a second contact portion at a position away from the second nip in the downstream direction to transfer a toner image from said second photosensitive member onto said intermediary transfer member in the second nip, wherein said first transfer roller is disposed at such a position that a peripheral surface thereof adjacent to said first and second photosensitive members is located a first amount from a common tangent line, adjacent to said intermediary transfer member, of said first and second photosensitive members, toward said first and second photosensitive members, and said second transfer roller is disposed at such a position that a peripheral surface thereof adjacent to said first and second photosensitive members is located a second amount from the common tangent line toward said first and second photosensitive members, with the second amount being smaller than the first amount, and wherein a length of the second contact portion is longer than a length of the first contact portion, measured in the moving direction, and a supporting roller disposed at a position which is adjacent to and downstream of said second transfer roller and which is disposed such that a peripheral surface thereof is spaced from the common tangent line away from said first and second photosensitive members.