Multiple Sheet Feed Prevention; Reference Diagram - Dell 3110cn Service Manual

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3.1.3 Multiple Sheet Feed Prevention

The sheets set in a tray or cassette are occasionally stuck together along the edges. The stuck

sheets cause a multiple sheet feed or a jam. The sheets are fed by the Nudger Roll to a position

between the Feed Roll and the Separator Roll. Normally, when only one sheet is fed, both the Feed

Roll and Separator Roll rotate to allow the sheet to pass. However, when two sheets are fed

concurrently, only the Feed Roll rotates and the Separator Roll is locked thereby allowing the upper

sheet to pass by being separated from the lower sheet that is stopped by the friction with the

Separator Roll at rest.

The Separator Roll is being pushed toward the Feed Roll by spring pressure, and controlled by the

torque limiter (Clutch Assy Friction) with which it is coupled.

Version 2 2006.03.28

Chapter 6 Principles of Operation

(Nudger Roll)

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