Operation; Drawer - Toshiba e-STUDIO163 Service Manual

10.4 Operation

10.4.1

Drawer

[A] Operation of pickup roller
When the drawer is inserted to the equipment, the lock located in the center of the drawer is released,
and the tray in the drawer is lifted up by the spring. This makes paper set in the tray to be contacted by
the pickup roller when it is rotated.
The driving force of the main motor (M4) is transmitted through the pickup clutch to the pickup roller.
Also the drawer pickup clutch transmits the drive when the pickup solenoid (SOL1) is turned ON. The
pickup roller rotates one turn by this driving force to pull out a sheet of paper from the drawer. The
pickup roller stops at its home position for each rotation. Therefore, when multiple sheets of paper are
fed, the pickup solenoid is turned ON by each rotation.
One rotation of the pickup roller, which is semicircle shaped, can transport a paper to the registration
roller.
This feeding system has no detection mechanism for the transported paper. Therefore, whether the
paper has been transported to the registration sensor within a specified time or not is substituted for the
paper jam detection.
[B] Paper separation
This model is equipped with the separation claws which work to prevent multiple paper feeding. Two
separation claws are installed to hold 2 corners of the leading edge of paper in the drawer.
When feeding starts, the pickup roller rotates. Since the friction between the pickup roller and paper is
greater than the friction between two sheets, the pickup roller tries to send out a sheet of paper from the
top of the stack. On the other hand, because both corners of the paper stack are held by the separation
claws, the paper is bent. When the picking up force of the roller increases, one sheet of paper is finally
released from the claws. The sheet released from the separation claws is directly transported to the
registration roller by the pickup roller.
December 2005 © TOSHIBA TEC
T.B.D.
Fig. 10-2
T.B.D.
Fig. 10-3
e-STUDIO163/203 PAPER FEEDING SYSTEM
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