| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device having high printing magnification accuracy by always restraining the change of image magnification to the minimum regardless of the kind (basis weight) of recording material P to be used and the number of printed sheets as an image forming device having a fixing device 105 constituted of at least a heating member 111 and a pressure member 116 driven and rotated in contact with the member 111, and thermally fixing an unfixed toner image by holding and feeding the recording material P carrying the unfixed toner image by a nip part N formed by the heating member and the pressure member of the fixing device. SOLUTION: This device has a means 106 for varying a plurality of fixing modes and recording material feeding speed, and the recording material feeding speed is changed corresponding to the fixing mode. |
