Fuser
unit is the component in a laser printer, copier or laser fax machine, after
the image and text is transferred onto the paper, if without fuser unit,
the toner particle can not melt and bond on the paper. To do this important process,
you can find out there are two steps to make this done, heat and pressure.
There
are two rollers set in the fuser unit, one is upper fuser roller which is to generate heat to
melt the toner, another one is located downside to press and assisit fusing, so
it's call lower pressure roller. When the paper with
loose toner powder pass through between these two roller, there's a heat
element inside the upper fuser roller release heat that transferred via fuser
film sleeve to the toner, and the lower roller conduct a pressure to make the
fusing much more firm.
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