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AR-651/810 PAPER FEEDING SECTION 9 - 2
(1) Pickup roller
These rollers draw paper off the stack from the bypass tray, cassette or tandem LCF and send it to the
feed roller.
(2) Feed roller
This roller is placed against the separation roller. It transports paper from the pickup roller to the
transport roller.
(3) Separation roller
This roller is placed against the feed roller. When two or more sheets of paper are sent from the pickup
roller, the load of the torque limiter of the separation roller is greater than the frictional force between the
sheets of paper. As a result, the separation roller is stopped and the lower paper is not advanced any
further. When only one sheet of paper is sent from the pickup roller, the separation roller rotates follow-
ing the feed roller.
(4) Transport rollers
These rollers transports the paper sent from the feed roller to the registration roller.
(5) Registration roller
The paper sent from the transport rollers is pushed against the registration roller which aligns its
leading edge of paper. As the correct timing the registration roller rotates to transport the paper to the
transfer section so as to align the leading edge of the paper with the leading edge of the image on the
OPC drum.
(6) Bypass feed sensor
This sensor detects if paper is set in the bypass tray. If it is, bypass feeding takes priority over
cassette feeding.
(7) Cassette empty sensor
This is an emission type sensor that detects the availability of paper in the cassette by using an
actuator. When there is no paper in the cassette, the actuator blocks the light path of the sensor, and
the sensor output in a rates that there is no paper.
(8) Feed sensor, Transport sensor
The feed sensor detects if the leading edge or trailing edge of the paper passed the feed roller. The
transport sensor detects if the leading edge or trailing edge of the paper passed the transport roller.
They also detect jams like misfeeding.
(9) Registration sensor
This sensor detects that the leading edge of paper has reached the registration roller and the trailing
edge of paper has passed the registration roller at the proper time.
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