| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming device which can reduce curled paper sheets and improve the paper sheets mounting quantity at a low cost, by obtaining the paper sheets quantity in the paper sheets ejection section and the paper sheets quantity increase rate using the ejected paper sheets quantity sensor provided in the paper sheets ejection section for preventing paper sheets from jamming or falling down and by changing the image forming sequence according to the curling. <P>SOLUTION: Two or more eject paper amount sensors 102, 103 are provided in the paper sheets ejection section 112 of the image forming device and the recording paper sheets quantity increase rate calculator 123 obtains the paper sheets quantity increase rate from the output signals of the ejection paper sheets quantity sensors 102, 103. When the paper sheets quantity increase rate is larger than a prescribed value, this image forming device decides that the curling deformations are poor, and makes the image forming condition changing means 126 change the image forming conditions, such as fixing temperatures, printing speeds, and fixing pressures. <P>COPYRIGHT: (C)2007,JPO&INPIT |
