| 摘要 |
PURPOSE:To execute excellent fixing by detecting the roughness of a paper by means of a surface properties detecting means disposed on the carrying passage of the paper, and increasing pressure between a fixing roller and a pressure roller when the degree of the roughness is high. CONSTITUTION:A toner image formed on a photosensitive body 1 is transferred on the paper P, carried, and fixed on the paper P by a fixing device 9 as a permanent image, and then, the paper is ejected. A means 10 for detecting the surface properties of the paper P is provided on the carrying passage of the paper P, and the paper P is carried while being interposed between the detecting means 10 and a guiding plate 13 with light pressure. The roughness of the paper P is detected by the surface properties detecting means 10 and the information of the detection is sent to a DC controller, and the pressure between the fixing roller 18 and the pressure roller 22 is adjusted with a control value corresponding to the roughness of the paper P. In other words, when the degree of the detected roughness is high, the pressure between the fixing roller 18 and the pressure roller 22 is enhanced to attain the fixing. Thus, even if the surface roughness of a transfer material is different, an excellent image can be obtained. |
