FIXING DEVICE AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a fixing device having a construction capable of eliminating all the failures caused in the case of changing fixing conditions correspondingly to a change in sheet thickness. SOLUTION: The fixing device having a construction capable of setting toner surface conditions corresponding to the glossiness in a state of a heating temperature kept constant at the toner contact position when the toner in the unfixed picture is made to penetrate the sheet by heating and pressing the unfixed picture held on the sheet, is characterized in that the fixing condition is adjusted according to the thickness of the above sheet, and a holding transport part of the sheet is provided with a sheet thickness detecting part 100.