Abstract: A method and apparatus to control the fusing temperature of an image forming apparatus. This method of controlling the fusing temperature of an image forming apparatus having a fan to exhaust the internal air to the outside includes counting the accumulated number of sheets of paper printed in response to print commands, lowering a set point of the fusing temperature and controlling the fan to increase the amount of air to be exhausted when the accumulated number of sheets of printed paper is greater than a predetermined value. According to the method, without installing an additional temperature sensor inside the image forming apparatus, the temperature therein can be presumed and controlled by controlling the fusing temperature of the fusing roller and a fan flow rate to lower the temperature of the paper, and consequently, preventing the formation of creases in the paper.

Abstract: A method and apparatus to control a set paper in an image forming device. When the user sets a type of paper unsupported by a cassette, the method and apparatus of the present invention generates a warning message that the setting is incorrect, and resets the type of paper in response to a user selection or converts the set type of paper into a different type of paper which has printing conditions similar to those of the set type of paper and is supportable by the cassette in order to prevent degradation of image quality in the unsupportable type of paper. Therefore, although a paper such as an envelope or a card requiring a high fixing temperature may be set, when a thin paper is inserted into the cassette to be printed, a printer engine can be protected from an unsuitably high temperature.