A DC positive bias is applied to the secondary transfer roller to charge the back side of a fed paper. This allows the toner on the ITB to transfer onto paper positively.

At the completion of secondary transfer, a DC negative bias is applied to the secondary transfer roller to avoid soiling the back of paper with the toner on the ITB.

Step 7: Separation

The elasticity of paper causes the paper to separate from the ITB in the step.

This printer utilizes the static charge eliminator to reduce the charge on the back of paper, and weaken the electrostatic adhesion of the paper and facilitate separation.

This makes a separation operation easier.

2.3.1.6 Fixing Block

A toner image transferred onto paper in the transfer block can be smeared easily by hands since only the electrostatic attraction holds the image on paper.

The toner on paper is melted and mixed by heat and pressure applied to it and then the image becomes permanent.

Step 8: Fixing

T oner

Photosensitive

drum

Primary

transfer roller

F-2-19

Secondary

transfer roller

DC bias

F-2-20