Step 5: Primary transfer
The positively charged primary-transfer rollers contact the ITB, giving the ITB a positive charge. The
ITB attracts the negatively charged toner from the surface of each photosensitive drum, and the
complete toner image transfers onto the ITB.
Figure 1-17 Primary transfer
ITB
Primary transfer bias
Primary transfer roller
Photosensitive
drum
Step 6: Secondary transfer
The paper acquires a positive charge from the secondary-transfer roller, and so it attracts the negatively
charged toner from the surface of the ITB. The complete toner image transfers onto the paper.
Figure 1-18 Secondary transfer
ITB
Secondary transfer bias
Secondary transfer roller
Paper
Secondary transfer
opposed roller
26 Chapter 1 Theory of operation ENWW
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