Canon LBP-3260 Service Manual page 80

CHAPTER 2
4. Fixing stage
The toner image transferred onto the paper in the transfer stage is held only by electrostatic
attraction and a slight physical adhesion, so even a light touch will smear the image.
In the fixing stage, the toner image is fixed by heating the paper and applying pressure. This
fuses the toner particles onto the paper to create a permanent image.
Step 6 Fixing
The upper and lower fixing roller surfaces are covered with teflon tubes with a very low adhesive
property.
The negative DC bias is applied to the upper fixing roller to prevent the toner from adhering
to the rollers.
Step 7 Fixing roller cleaning
Fixing cleaning roller
In the fixing stage, not all the toner particles are fixed to the paper. In some cases, toner parti-
cles on the back of the paper are adhered to the lower roller.
The fixing cleaning roller cleans the lower fixing roller by attracting the residual toner on the
lower fixing roller.
2 - 40
Halogen heater
Upper fixing roller
DC bias
Figure 2-4-12
Upper roller
Residual toner
Figure 2-4-13
Toner
Paper
Lower fixing roller
Toner
Paper
Lower roller