Minolta EP5000 General, Mechanical/Electrical page 86

Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
(2) Paper Separating Mechanism
D The paper separating mechanism ensures that only the top sheet of paper is fed
in by separating the second sheet of paper from the top one.
D This is accomplished by the difference in friction coefficient between the first and
second sheets of paper.
<Normal Feeding>
Feed Roll
Paper
Separator Roll
Driven or stationary
<Double Feeding>
Feed Roll
1st sheet
of Paper
2nd
sheet of Paper
Separator Roll
Stopped
D When only one sheet of paper is fed, the friction
coefficient on the top side of the paper is equal
to that on the underside.
D Driven by the Feed Roll, the paper drives the
Separator Roll. This causes the paper to be sent
to the Vertical Transport Section.
D The friction coefficient varies for different ambi-
ent conditions and types of paper being used,
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which often causes the Separator Roll to be sta-
tionary.
D Since the coefficient of friction between the top
side of the first sheet of paper and the Feed Roll
is greater than that between the first and second
sheets of paper, the first sheet of paper is fed
into the copier by the Feed Roll.
Since the friction coefficient between the se-
cond sheet of paper and the Separator Roll
is greater than that between the first and se-
cond sheet of paper, the Separator Roll is not
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driven and holds the second sheet of paper.
M-72