| 摘要 |
PROBLEM TO BE SOLVED: To provide an image reading device, an image forming apparatus, and an image forming system capable of performing highly accurate image correction.SOLUTION: An image reading device comprises: a reading device 55 for reading a sheet P; a backing 80 which is disposed while facing the reading device 55, and on which a facing surface facing the reading device 55 is formed; and a switching control part 111 for switching a color of the facing surface with respect to the reading device 55 on the backing 80 to black or white, on the basis of momentum for reading the sheet P by the reading device 55. A forming range of a patch 201 formed on the sheet P is determined on the basis of a position of a nip for suppressing sag of the sheet P within an allowable range, a switching time until a color of the facing surface is switched to white by the switching control part 111, and transport speed for transporting the sheet P.SELECTED DRAWING: Figure 1 |
