| 摘要 |
PROBLEM TO BE SOLVED: To efficiently form an image and to make unwastefully usable recording paper. SOLUTION: A reading part 3 reads the image of a document 21 that an automatic document feeder 2 carries. A recording paper 35 is carried into an image forming part 4 via a first path 5 by a first carrying roller 8, and is printed on its one side. It is passed via a third path 7 to be turned back to front, is re-carried into the image forming part 4 by a third carrying roller 10 and the first carrying roller 8, is printed on its other side, and is carried out via a second path 6 by a second carrying roller 9. When a document-carry- abnormality detection part 11 detects an abnormality in the carrying of the document in the course of the carrying of the recording paper 35 to be printed on the other side after the one side of the recording paper 35, a control part 15 judges the positions of the leading end of the recording paper on the first - third paths 5-7 based on the detection results of the sensors 12-14, and controls the operations of the first - third carrying rollers 8-10 based on the positions so that the recording paper 35 is re-carried into the image forming part 4. |
