| 摘要 |
PROBLEM TO BE SOLVED: To form toner images on both sides of a sheet such that even when environment conditions for using an image forming apparatus is changed, a sheet having a toner image formed on one side is appropriately guided to a resist roller from a return path and fed out to an image forming path, and thereby toner images are appropriately formed on both sides of the sheet.SOLUTION: In order to guide a sheet S having a toner image formed on one side to a resist roller 15 through between an upper guide member 31 and a lower guide member 32 provided on a folded-back shape return path L2, angle adjustment means 50 is configured to adjust an angle of the sheet S to be guided to the resist roller 15 through between the upper guide member 31 and the lower guide member 32 on the basis of usage environment conditions detected by an environment sensor 40. |
