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November 2003 © TOSHIBA TEC 10 - 7 e-STUDIO3511/4511 PAPER FEEDING SYSTEM
10
10.2.3 Separation of paper
The separation roller in this equipment works to separate the sheets being fed. The separation roller unit
consists of the feed roller, separation roller, spring joint, etc., as shown below.
The feed roller is rotated by the feed clutch in the direction of the arrow ( ) at the same timing as the
pickup roller rotation.
The figure at the bottom of this page shows how duplicate feeding is prevented: Since the friction between
two sheets is small, the lower sheet is not transported any further while the upper sheet is transported by
the feed roller in the direction of the arrow ( ).
Fig. 10-203
[Example]
When only one sheet enters between the rollers: Since the transporting force of the feed roller is greater
than the braking force of the separation roller, the separation roller follows the feed roller, making the
sheet go forward to the registration roller.
When two sheets enter between the rollers at the same time:
Since the transporting force of the feed roller and the breaking force of the separation roller are greater
than the frictional force between two sheets, the paper A is transported to the direction of the arrow
( ) and the paper B is braked by the separation roller and is not transported any further.
Feed roller
Separation roller
Spring joint
Feed roller
Separation roller
A
B
Fig. 10-204