Step 5: separation from the drum
The elasticity of the print media causes it to separate from the drum surface. The sheet continues
travelling through the printer. The static charge eliminator reduces static discharge.
Paper
Transfer charging roller
Photo-
sensitive
drum
Static charge eliminator
Figure 4-13 Separation from the drum
Fixing block
Until the fusing stage is complete, the image is not permanently affixed to the print media. The toner
can be easily smudged until the heat and pressure of the fusing process fix the image to the sheet.
Step 6: fusing
The printer uses a ceramic heater to accomplish the on-demand fusing process. The heater has a low
heat capacity, which results in a short warm-up period and yields energy savings.
Figure 4-14 Fusing
Drum-cleaning block
Not all of the toner is removed from the photosensitive drum during the transfer stage. During the
cleaning stage, the residual (waste) toner and residual electrical charge is cleared from the drum surface
to prepare the surface for the next latent-image formation.
Step 7: drum cleaning
The cleaning blade scrapes the residual toner off the surface of the photosensitive drum and deposits
it in the waste-toner container. The drum is now clear, and is ready for the next image-formation process.
62 Chapter 4 Theory of operation ENWW
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