| 摘要 |
PROBLEM TO BE SOLVED: To provide an image heating device capable of reducing the temperature rise at an end and is compatible with sheets having various width sizes in an image heating device 40 that holds and conveys a sheet P carrying a toner image T at a nip part N while heating the toner image.SOLUTION: An image heating device comprises: a first rotor 41 that is cylindrical; a metal member 47 that is fixedly provided therein and is cylindrical; a heating body 43 and a reflection member 43 that reflects radiant heat from the heating body toward an inner surface of the metal member; a backup member 46 that is in contact with an inner surface of the metal member; and a second rotor 44 that contacts with the metal member 47 with the first rotor interposed therebetween at a position opposite to the backup member to form a nip part between the first rotor and the second rotor. The backup member 46 thermally deforms in a direction of reducing the area of a contact region between the metal member 47 and the first rotor at a nip part or a nip adjacent part corresponding to a sheet non-passing part in accordance with the temperature rise at an end caused by continuous introduction of sheets smaller in width than a maximum width sheet that can be used in apparatus.SELECTED DRAWING: Figure 1 |
