Patent ID: 7675010

Claim:
A method for controlling a temperature of a heating roller of a fixing apparatus, comprising: comparing first temperature data and second temperature data which are input, with each other; determining whether a temperature indicated by the first temperature data is higher than that by the second temperature data or not; determining, when it is determined that the temperature indicated by the first temperature data is higher than that by the second temperature data, whether a difference between the temperatures indicated by the first and second temperature data is greater than a predetermined difference or not; increasing a ratio of power to be supplied to a heating element to which the second temperature data is input to power to be supplied to another heating element to which the first temperature data is input; and increasing a ratio of the power to be supplied to said another heating element to which the first temperature data is input to the power to be supplied to the heating element to which the second temperature data is input, when it is determined that the temperature indicated by the second temperature data is higher than that by the first temperature data, and it is also determined that the difference between the temperatures indicated by the first and second temperature data is greater than the predetermined difference.