Toner image fusing device with optimized control of cooling a pressure roller

A fusing device in a recording apparatus which device successively fuse toner images onto unrolled paper of a desired length while holding the unrolled paper between a heating roller and a pressure roller, said fusing device comprising:

• temperature detecting means for detecting at least one of an ambient temperature and a temperature of a section in which roll paper is set;
• first cooling means provided so as to cover a region of the pressure roller over which smaller size unrolled paper passes, and second cooling means provided so as to cover a region of the pressure roller over which only larger size unrolled paper passes;
• and
• control means for controlling the first and second cooling means in accordance with the temperature detected by the temperature detecting means so that the first and second cooling means are effected when the smaller size unrolled paper passes through the fusing means if the detected temperature is equal to or higher than a predetermined value, and only the second cooling means is effected when the smaller size unrolled paper passes through the fusing means if the detected temperature is lower than the predetermined value.