Fixing device

摘要

In a device for fixing a toner image, provided with a heating roller including a heater, the heating roller having a length larger than a possible largest size sheet to be fixed so that the heating roller has an excess portion on which a small size sheet does not pass over; a pressing roller for coming in contact with the heating roller; and a cooling roller for coming in contact with the excess portion of the heating roller so as to cool the excess portion; one of the heating roller and the cooling roller is a metal roller and the other one is a roller comprising an elastic material layer.