Canon LBP-1000 Service Manual page 65

applied to the back of the paper, they may be dispersed at fixing.
This printer applies the negative DC voltage to the fixing film via the pressure roller shaft
(pressure roller shaft is a mere continuity path). The negative charge is applied to the paper sur-
face by the fixing film. This improves the adhesion force of the toner particles to the paper and
prevents dispersion of the toner particles.
This printer utilizes an on-demand method which uses fixing film with small heat capacity.
This method has fast temperature rising time and it is not necessary to supply power to the fix-
ing heater during the STANDBY mode. Wait time of less than 10 seconds and energy conserva-
tion are made possible by this method.
Fixing film is cylindrical film of polyimide. Its surface is coated with fluorine to prevent off-
set.
5. Drum cleaning block
In the transfer block, not all the toner is transferred to the paper, but some remains on the pho-
tosensitive drum.
In this block, the residual toner is cleaned off so that the next print image will be clear and
distinct.
Step 7: Drum cleaning
The residual toner on the drum surface is scraped away with the cleaner blade to clean the drum
surface in preparation for the next print. The removed toner is collected in the waste toner case.
Cleaner blade
Waste toner case
Figure 2-4-13
Photo-
sensitive
drum
Sweeper strip
CHAPTER 2
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