| 主权项 |
1. An image forming apparatus comprising:
an image forming portion configured to form a toner image on a sheet; a pair of rotatable members configured to form a fixing nip for fixing the toner image, formed by said image forming potion, on the sheet, at least one of said pair of rotatable members being an endless belt; a contact-and-separation portion configured to move said pair of rotatable members toward and away from each other; a driving portion configured to rotationally drive said belt; a detecting portion configured to detect presence or absence of the sheet and another object on a sheet feeding path downstream of the fixing nip with respect to a sheet feeding direction; and an output portion configured to output a signal indicating breakage of said belt upon detection of the presence of the object on the sheet feeding path by said detecting portion when said rotatable members are spaced from each other and said belt rotates. |
