Multiple Sheet Feed Prevention; Reference Diagram - Dell 2130cn Service Manual

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3.11.3 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 Feed 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.

Separator Roller

Clutch Assy Friction

Separator Roller

Chapter 6 Principles of Operation

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