| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress an image from being elongated due to the fact that a recording material P is pulled due to such a reaction that the reverse loop of the recording material P between a transfer part 3 and a fixing part 5 is removed, in an image forming apparatus 1 adopting an electrophotographic system. <P>SOLUTION: The image forming apparatus includes the transfer part 3 transferring a toner image formed on an image carrier 6 to the recording material P, the fixing part 5 fixing the transferred toner image to the recording material P, a loop detection member 41 detecting the presence or absence of the loop L of the recording material P in an intermediate path 40 reaching the fixing part 5 from the transfer part 3, and a speed switch part 45 capable of switching the drive speed of the fixing part 5 to high and low two stages Vh and Vl based on a process speed Vo as a reference, on the basis of the detection result of the loop detection member 41. When a loop absence detection time Toff by the loop detection member 41 exceeds a specified time Tz, the speed switch part 45 continuously switches the drive speed of the fixing part 5 to the high and low stages Vh and Vl. After that, when the loop detection member 41 detects the presence of the loop, the speed switch part 45 completes switching to the high and low stages Vh and Vl. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
