Retard roller and retard roller module having such retard...

Details Retard roller and retard roller module having such retard... Retard roller and retard roller module having such retard...

2010-03-16

2011-11-29

Joerger, Kaitlin (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S113000, C271S114000, C271S116000

Reexamination Certificate

active

08066274

ABSTRACT:
A retard roller of an automatic document feeder provides a frictional force to separate plural documents from each other. The retard roller can provide a first damping torque and a second damping torque with different directions. The second damping torque is smaller than the first damping torque. As such, the frictional force exerted on the document is reduced for returning the document out of the automatic document feeder. A retard roller module having such a retard roller is also provided.

REFERENCES:
patent: 2595454 (1952-05-01), Greenlee
patent: 3128864 (1964-04-01), Hungerford et al.
patent: 3450365 (1969-06-01), Kaplan
patent: RE33514 (1991-01-01), Ciolli
patent: 7448611 (2008-11-01), Chang
patent: 7708267 (2010-05-01), Shigeno
patent: 2002/0171193 (2002-11-01), Asai et al.
patent: 2002/0175462 (2002-11-01), Sonoda et al.

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