| 摘要 |
PROBLEM TO BE SOLVED: To prevent an increase in size of a device in which output paper with an image formed on one side is re-fed to an image forming part through a paper re-feed path and to increase the speed of image forming action. SOLUTION: This device includes a paper feeding part for feeding paper P; an image forming part in which an image is formed on one side of the paper P fed from the paper feeding part; a paper output tray 3 on which the paper P with the image formed thereon by the image forming part is output and stacked; and a paper re-feed path L2 through which the paper with the image formed on one side by the image forming part is re-fed to the image forming part in order to form an image on the other side. A pickup roller 19 by which the paper P unloaded onto the paper output tray 3 and having the image formed on one side is conveyed to the paper re-feed path L2 during formation of images on both sides is provided, and a paper feed port 18 through which the paper is fed from the paper output tray 3 to the pickup roller 19 is provided. A shutter 14 for opening and closing the paper feed port 18 is provided. |
