| 摘要 |
PROBLEM TO BE SOLVED: To prevent the image defect and conveyance defect arising from a conveyance state of a recording material after a transfer material moves out of a transfer roller pair, i.e., a loop state of the recording material between a fixing roller pair and an ejection roller pair. SOLUTION: The image forming apparatus is equipped with the transfer roller pair 3 which transfers an unfixed image on a photoreceptor drum to the recording material, the conveyance speed changeable fixing roller pair 5 which fixes the transferred unfixed image to the recording material, a conveyance speed changeable ejection roller pair 11 which ejects ad conveys the image fixed recording material, a loop detecting sensor S which detects the loop state of the recording material between the transfer roller pair 3 and the fixing roller pair 5, and a control means controlling the loop of the recording material so as to maintain the same within a specified range by switching the conveyance speed of the fixing roller pair 5 based on the detection of the loop detecting sensor S. The control means controls the ejection roller pair 11 in such a manner that the recording material conveyance speed is the same with the recording material conveyance speed of the fixing roller pair 5 after the recording material passes the transfer roller pair 3. COPYRIGHT: (C)2006,JPO&NCIPI
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