| 摘要 |
PROBLEM TO BE SOLVED: To eliminate troubles such as the lowering of image quality and the soiling of the back surface of paper at the time of double-sided printing by decreasing tensile stress and compressive stress applied to the surface of a belt so that the surface layer of the belt may be prevented from being damaged. SOLUTION: The fixing device is equipped with: a heating roller 1; a pressure roller 2 pressed on the heating roller; a belt stretching and laying member 4 arranged on an upstream side in a paper conveying direction with respect to the pressure roller and disposed on the pressure roller through a tension spring; and the belt 3 wound round the outer peripheries of the pressure roller and the belt stretching and laying member and moving while forming a fixing nip between the heating roll and the belt 3 itself. The belt is constituted in such structure that a plurality of belts are engaged to each other. COPYRIGHT: (C)2006,JPO&NCIPI
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