Epson EPL-N4000 - Transfer; Detack

EPSON EPL-N4000/EPL-N4000+ Chapter 2 Operating Principles
Rev.B 72
2.4.4 Transfer
As the paper travels between the BTR and the drum surface, the Bias
Transfer Roll (BTR) applies a positive char
g
e to the back of the printin
g
paper. This positive char
g
e transfers the ne
g
ative char
g
ed toner ima
g
e
from the drum surface to the top surface of the paper. The toner ima
g
e
is now on the paper and the paper is now stuck to the drum surface, due
to the relative electrical differences between the ne
g
ative electrical
char
g
e of the inner conductive layer of the drum and the positive
electrical char
g
e of the paper.
Figure 2-28. Transfer
2.4.5 Detack
After the toner ima
g
e transfers to the surface of the paper, the Detack
Saw (a thin strip of metal that resembles a saw blade) applies a low
volta
g
e ne
g
ative char
g
e to the back of the paper to neutralize the
positive volta
g
e that was applied to it by the BTR. Once the positive
volta
g
e is neutralized, the paper strips releases easily from the drum
surface and continues alon
g
the paper path to the Fuser.
Figure 2-29. Detack
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