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e-STUDIO3511/4511 FUSER UNIT/PAPER EXIT SECTION 16 - 2 November 2003 © TOSHIBA TEC
16
16.3 Functions
(1) IH coil (IH: Induction Heating)
The IH coil is inside the fuser roller and applies the induction heating to the fuser roller. This IH coil is
divided into two parts; the main IH coil heating the center of the fuser roller and the sub IH coil
heating both ends of the fuser roller. Each part turns ON/OFF individually controlling the balance of
electric supply so that the fuser roller can be kept at a certain temperature without wasting electric
power on any paper size.
(2) Fuser roller
The fuser roller is a metal roller which generates heat spontaneously with eddy current produced by
the electromagnetic induction of IH coil. The fuser belt is heated by this self-heating of this roller, and
then the toner is fused on the paper.
(3) Pressure roller
The pressure roller is a sponge roller which assures the nip amount between the fuser roller and
fuser belt. The pressure arm and spring press the fuser roller and fuser belt.
The toner is fused effectively by the pressure of this roller.
(4) Fuser belt
The fuser belt is hanged up between the fuser roller and separation roller and fuses the toner image
on the paper transported by being heated.
The thin fuser belt enables to reduce warming up time and mode changing time. To prevent the fuser
belt from adhering toner, the surface of the fuser belt is fluorinated.
(5) Separation roller
The separation roller is an extra small ceramic roller coated with the fluororesin tube. When the fuser
belt is tensed and driven by the separation roller, the fuser roller drives the fuser belt and the paper
between the fuser belt and pressure roller is separated from the fuser belt (belt separation method).
(6) Separation fingers
Five separation fingers are installed above the pressure roller to separate the paper stuck on the
pressure roller.
(7) Separation plate
The separation plate is installed above the separation roller to cover the insufficient separation often
occurs at color printing - the mode that the toner is much adhered.