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FIXING UNIT
FIXING UNIT
[1] Composition
[2] Mechanisms
Mechanism Method
Fixing Pressure + heat roller
Heat source Heater lamp (Two upper and one lower
lamp)
Cleaning Fixing cleaning roller (silicone oil)
Upper roller Aluminium + PFA coating
Lower roller Silicone rubber + PFA tube
Separation Separation claws (6 upper and 3 lower
claws)
Temperature Upper roller
detection * Contactless type thermistor (for control)
* Contact type thermistor (for abnormality
detection)
Lower roller
* Contactless type thermistor (for control)
Overheating Non-contact type thermostat
prevention (1each for upper and lower roller)
Neutralizing Neutralizing brush
Pressure release Pressure release cam, spring
Jam sensor Photo sensor (also used as paper exit PS)
*2: Lower roller pressing and release
When you move the pressure release lever in the fixing or
release direction, the pressure cam pushes the pressure
spring up or down, causing the lower roller to be pressu-
rized or released.
Lower fixing roller
Pressure release lever
Pressure spring
Pressure cam
Upper fixing
roller
Fixing heater
lamp (upper)
Lower fixing roller
Lower fixing claw
Paper exit roller
(lower)
Paper exit
roller (upper)
Oil pad
Pressure release lever
*1
Fixing heater
lamp (lower)
Oil pad
Upper fixing claw
Fixing cleaning roller
Oil apply roller
*2
*3
Paper exit roller/
upper unit
Fixing cleaning roller
*1: Fixing heater lamps
The fixing heater lamps consists of three halogen lamps
(two for the upper fixing roller and one for the lower fixing
roller). They are intended to reduce the warmup time from
when the machine is switched ON.
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