| 摘要 |
A first stretch roller (21) stretches a secondary transfer belt at a position where a tip in a conveying direction of a recording medium (P) being conveying through a secondary transfer portion (T2) can reach thereto. The first stretch roller has a circumferential surface formed into a normal crown shape in which a straight area (21c) where a diameter of the first stretch roller is constant is provided at a center part in a direction of axis of rotation. A second stretch roller (22) has a circumferential surface formed into an inverse crown shape in which a straight area (22c) where a diameter of the second stretch roller is constant is provided at a center part in a direction of axis of rotation. |
