Canon imageFORMULA DR-X10C Service Manual page 47

Then the double feed retry is described
below. If the double feed retry function is not
disabled, the feeding of the document stops
when a double feed is detected by the ultra-
sonic sensor. The document is returned to the
pickup inlet by rotating the rollers in the re-
verse direction. The motor that drives the
rollers located where the document stops can
be rotated in the reverse direction.
If there are no reverse rollers, the feeding
force is not stable and the document may be
Feed roller
Retard roller
Then, a side view when the reverse roller
moves upward and downward is shown below.
When the reverse motor rotates, the sensor
lever rotates. The sensor lever is inte-
1
grated with the cam
Reverse roller is up.
Reverse roller
COPYRIGHT © CANON ELECTRONICS INC. 2008
Ultrasonic sensor
Figure 2-304
. Since this cam sur-
2
Sensor lever
Cam
Mounting
plate
Clearance
Figure 2-305
CANON DR-X10C FIRST EDITION
CHAPTER 2 FUNCTION & OPERATION
skewed or jammed when it is returned. In
case of ordinary feeding, the reverse roller is
not necessary, so it is at the upper position,
and does not touch the document. When re-
turning the document, the reverse roller is
moved downward.
However, if a double feed is detected after
the document is fed backward 100 mm or
more from the registration sensor (rear), the
double feed retry is not carried out.
Registration roller
face is in contact with the surface of the
mounting plate
3
the sensor lever rotates, the mounting plate
rotates and the reverse roller
Reverse roller is down.
Rotation
Reverse roller
Reading roller (front)
of the reverse roller, when
lowers.
4
Sensor lever
Mounting
plate
Cam
2-17