This machine has a feed belt and a reverse roller (FRR method).
The direction that the reverse roller turns depends on the frictional forces acting on it. When there is a single sheet of paper between the feed belt and reverse roller, the friction between the feed belt and the paper is greater than the reverse force from the reverse roller. So, the reverse roller turns in the direction of paper feed.
If two or more sheets are fed between the belt and roller, the forward force on the second sheet becomes less than reverse force from the reverse roller because of the low friction between the two sheets. So, the reverse roller drives the second sheet back to the tray.
Finally, the feed belt and the reverse roller feed the paper into the machine.
No. | Description | No. | Description |
|---|---|---|---|
1 | Pick-up Roller | 3 | Reverse Roller |
2 | Feed Belt |