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The fusing belt has a thick elastic layer, as with the previous model, to allow the belt to reach farther into the surface indentations of textured media.
A total of four heaters are used in the fusing unit: three in the heating roller [11], one in the pressure roller [13].
Toner is fused onto the media by applying heat to the fusing belt [12] via the heating roller [11], maintaining consistent temperature and pressure on the media.
The heater in the pressure roller [13] functions as a supplementary heater, to maintain consistent temperature at the nip between the fusing and pressure rollers.
The fusing temperature can be adjusted by print mode(BW/FC/FCS/S), as the optimum fusing temperature is dependent on the amount of toner.
(The more there is toner, the more heat needed for fusing. Clear toner also requires high fusing temperature to yield the gloss effect.)
The fusing temperature is momentarily increased one notch immediately before the paper passes through the nip, to compensate for the slight temperature drop of the fusing belt [12] due to the heat absorption by the paper.
In addition, the target fusing temperature is momentarily increased another notch immediately before the pressure roller [13] contacts the fusing belt, to compensate for the slight temperature drop due to the contact.
Printing starts when the fusing belt temperature reaches the prescribed temperature range against the target.
Image quality issues originating in the fusing unit, for example, residual gloss images, river marks, can be prevented by adjusting the target fusing temperature.
Related Advanced Settings
