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e-STUDIO350/352/353/450/452/453
PAPER FEEDING SYSTEM
9
9 - 3
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
(1) Pickup roller
This roller moves up and down to draw out a sheet of paper from the bypass tray or the drawer,
and transport it to the feed roller.
(2) Feed roller
This roller transports the paper from the pickup roller to the registration roller.
(3) Separation roller
This roller is mounted against the feed roller. When two sheets of paper or more are transported
from the pickup roller, the load of the torque limiter (spring) of the separation roller is greater than
the frictional force between the sheets. As the result, the separation roller is stopped and the
lower sheet of paper is not transported any further. When only one sheet of paper is transported
from the pickup roller, the separation roller is forced to rotate following the feed roller.
(4) Transport roller
This roller transports the paper from the feed roller to the registration roller.
(5) Registration roller
Paper transported from the feed roller is pushed against the registration rollers, which aligns the
leading edge of paper. The registration roller then rotates to transport the paper to the transfer
section.
The following sensors detect the presence/absence of paper and the position of the paper being trans-
ported, to control the ON/OFF of the corresponding rollers.
(6) Bypass paper sensor
This sensor detects whether paper is set in the bypass tray or not. If it is, bypass feeding is per-
formed in preference to drawer feeding.
(7) Bypass feed sensor
This sensor detects whether paper has been transported from the bypass tray or not. It also de-
tects whether the leading/trailing edge of paper has passed the feed sensor or not. This sensor is
utilized to detect the jams such as paper misfeeding in the bypass unit.
(8) Drawer empty sensor
This is a transmissive-type sensor which detects the presence/absence of paper in the drawer
using an actuator. When there is no paper in the drawer, the actuator blocks the light path of the
sensor. Then the sensor determines that there is no paper.