COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON DADF-J1 REV.0 MAR.2001
CHAPTER 2 OPERATIONS AND TIMING
2-57
2.7 Pre-Reversal Pickup/Delivery
2.7.1 Outline
In pre-reversal, the original is handled by turning it over in advance of sending it to the
copyboard glass.
Pre-reversal pickup/delivery is used when making double-sided copies of small-size origi-
nals, and fixed reading is used for it.
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2.7.2 Operations
1) The 1st original is picked up, and its leading edge is butted against the registration roller
to remove the skew. (For details of operation, see 2.4 “Picking Up/Separating Originals”
on p. 2-26.)
F02-207-01
2) The registration roller and the reversing roller are driven to turn over the original.
The 1st original is moved by the reversing roller for a specific length after its trailing
edge has moved past the pre-registration roller paper sensor (S2) and then stopped.
F02-207-02
1st original
Registration roller
Pre-registration roller paper sensor (S2)
Reversing roller
Operation
Pre-reversal pickup/
delivery
Operation mode
Fixed reading
Copying mode
Double-sided original to single-side copy (reproduc-
tion ratio: 25% to 400%)
Double-sided original to double-sided copy (reproduc-
tion ratio: 25% to 400%)
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