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Tray 2 cassette multiple-feed prevention
The product uses a separation roller method to prevent multiple sheets of print media from entering the
paper path. The Tray 2 cassette separation roller does not have its own driving force. Therefore the
Tray 2 cassette separation roller follows the rotation of the Tray 2 cassette pickup roller.
During normal feed, when the product picks up one piece of paper, the Tray 2 cassette separation
roller is driven by the Tray 2 cassette pickup roller through one sheet of paper. Thus the separation
roller rotates in the paper feed direction.
During multiple-feed, when the product picks up more than one piece of paper, the low friction force
between the sheets weakens the driving force from the Tray 2 cassette pickup roller. In addition, some
braking force is always applied to the Tray 2 cassette separation roller, so the weak rotational force of
the pickup roller is not enough to rotate the separation roller. Therefore, the separation roller holds
back any multiple-fed sheets, and one sheet of paper is fed into the product.
Figure 1-35 Tray 2 cassette multiple-feed prevention
CST Pickup roller
Print media
Lifting plate
<Normal-feed> <Multiple-feed>
The separation roller does not rotate
CST separation roller
ENWW
Pickup, feed, and delivery system
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