| 摘要 |
The invention provides a fixing device capable of preventing extreme decrease of pressure in a fixing nip. The fixing device includes an endless fixing belt for fixing a toner image on a recording material, a roller for suspending the fixing belt, a pressure pad for pressing the fixing belt provided without contact with the roller, and pressing means provided in press contact with the fixing belt for forming a fixing nip from the pressure pad to the roller, in which the relation of <?in-line-formulae description="In-line Formulae" end="lead"?>Y>= 1x10 <SUP>8</SUP>X<SUP>2</SUP> +2x10 <SUP>6</SUP>X, and <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?> 0<Y< 2.6x10 <SUP>7</SUP><?in-line-formulae description="In-line Formulae" end="tail"?> Is satisfied, where y is the product of young's modulus of the base material of the fixing belt and thickness (Mpa.mm), and x is the product of length of gap between the pressure pad and the roller in moving direction of the fixing belt and pressure per unit area at the gap (Mpa.mm).
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