| 摘要 |
An image forming apparatus includes a sheet conveyance unit which conveys a long sheet having such a length as to extend at least from a sheet feed opening to a sheet output opening of an apparatus body, an image forming unit which transfers a toner image onto the sheet, a fixing unit including a heater to fix the transferred toner image, a temperature detector which detects a temperature of the fixing unit, and a control unit which controls the sheet conveyance unit in such a way that, when the front edge of the sheet is to be conveyed from the sheet feed opening to the sheet output opening with no toner image transferred onto the sheet, the front edge is prohibited from being conveyed into the fixing unit if the temperature of the fixing unit is higher than a first predetermined temperature. |
| 主权项 |
1. An image forming apparatus comprising:
a sheet conveyance unit which conveys a long sheet having such a length that the long sheet is to extend at least from a sheet feed opening to a sheet output opening of an image forming apparatus body; an image forming unit which transfers a toner image onto the long sheet; a fixing unit comprising a heater to fix the transferred toner image; a temperature detector which detects a temperature of the fixing unit; and a control unit which controls the sheet conveyance unit to convey the long sheet through the sheet feed opening of the image forming apparatus body, the image forming unit, the fixing unit, and the sheet output opening of the image forming apparatus body in this order, wherein the control unit controls the sheet conveyance unit in such a way that, when the sheet conveyance unit is to convey a front edge of the long sheet from the sheet feed opening to the sheet output opening of the image forming apparatus body with no toner image transferred onto the long sheet by the image forming unit, the front edge of the long sheet is prohibited from being conveyed into the fixing unit if the temperature of the fixing unit detected by the temperature detector is higher than a first predetermined temperature. |
