| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of optimizing the holding time for reducing curl to perform printing with high image quality.SOLUTION: An image forming apparatus includes: an ink head 2; a sheet conveying path; a reverse conveying path for reversing a sheet in which printing is completed on a front surface thereof during two-sided printing; a sheet water-content sensor 30 which is arranged on the sheet conveying path, and detects the moisture in the vicinity of a surface of the sheet to detect the water content; an environment sensor 31 which is arranged on the reverse conveying path, and detects the moisture around the reverse conveying path; curl-amount calculating means 150 for calculating the time change of the curl amount on the basis of the ink coating-amount, the sheet property and detection results of the sheet water-content sensor 30 and the environment sensor 31; and holding-time calculating means 160 for determining the time for holding the sheet in the reverse conveying path during the two-sided printing on the basis of a calculation result of the curl-amount calculating means 150.</p> |
