HP Enterprise CP5525 manual Tray 2 cassette multiple-feed prevention

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 1-35Tray 2 cassette multiple-feed prevention

CST Pickup roller

Print media

CST separation roller

Lifting plate

	The separation roller does not rotate
<Normal-feed>	<Multiple-feed>

ENWW Pickup, feed, and delivery system 49