| 摘要 |
The image forming apparatus is equipped with an intermediate transfer belt, a toner image forming portion, a biasing member, a support roller, a rotator, a power supply, a guide portion, and a press member. The press member is arranged upstream from the nip portion in the direction of rotation of the intermediate transfer belt and adjacent to the nip portion, and elastically presses an inner side surface of the intermediate transfer belt. A press force by which the press member presses the intermediate transfer belt is greater than a tension that the biasing member applies to the intermediate transfer belt. |
| 主权项 |
1. An image forming apparatus comprising:
an intermediate transfer belt; a toner image forming portion configured to form a toner image on the intermediate transfer belt; a biasing member configured to bias an extension roller on which the intermediate transfer belt is extended toward the intermediate transfer belt and applying tension to the intermediate transfer belt; a support roller in contact with an inner side surface of the intermediate transfer belt, configured to support the intermediate transfer belt; a rotator configured to form a nip portion by nipping the intermediate transfer belt with the support roller; a power supply configured to apply voltage between the rotator and the support roller, and to transfer a toner image at the nip portion to a recording medium conveyed through the nip portion; a guide portion, disposed upstream from the nip portion in a direction in which the recording medium is conveyed, configured to guide the recording medium to the nip portion; and a press member arranged upstream and adjacent to the nip portion in a direction of rotation of the intermediate transfer belt from the nip portion, configured to elastically press an inner side surface of the intermediate transfer belt, a press force of the press member for the intermediate transfer belt being greater than the tension that the biasing member applies to the intermediate transfer belt. |
