Transfer Unit - Oki LP-1040 Maintenance Manual

12.5.5

Transfer Unit

The transfer process develops the electrostatic latent image, then takes the toner that is stuck
to the photoconductor by the Coulomb force, and works against the Coulomb force to move
that toner to the paper or other base material (otherwise known as the electrostatic transfer
process).
The electrostatic transfer method electrostatically applies 1 to 3 layers of electrically charged
toner particles 5 to 15 μm in diameter to the electrostatic latent image on the surface of the
photoconductor. Then, it applies a charge to those particles through the back side of the
transfer paper, and moves the particles to the transfer paper by using the Coulomb force in the
electrical field created between the paper and the photoconductor.
This Printer uses voltage impression roller transfer.
Transfer unit functions
(a) Paper charge function
Positive DC voltage is applied to the back surface of the paper, at which time negatively
charged toner is transferred to the paper.
(b) Paper transport
Paper is held between the photoconductor drum and the transfer roller to be transported.
Chapter 12 Printer Operation Guide
12-17