Sheet feeding apparatus, image reading apparatus equipped...

Details Sheet feeding apparatus, image reading apparatus equipped... Sheet feeding apparatus, image reading apparatus equipped...

2006-10-02

2008-11-04

Mackey, Patrick H (Department: 3653)

Sheet feeding or delivering

Feeding

With means to interrupt feeding

C271S262000, C271S265020, C271S265040, C271S145000

Reexamination Certificate

active

07445209

ABSTRACT:
A sheet feeding apparatus includes a sheet size recognition device for recognizing length of a sheet placed on a stacker in a transport direction, an ultrasonic double feed detection device arranged between a first transport device and a second transport device for detecting a double feed of sheets, and a transport length detection device for detecting a transport length of the sheet transported by the first and second transport devices from a leading edge of the sheet to a trailing edge of the sheet. A comparison device compares the length of the sheet recognized by the sheet size recognition device and the transport length of the sheet detected by the transport length detection device. A judgment device judges the double feed of the sheets based on at least one of a comparison result from the comparison device and a detection result from the double feed detection device.

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patent: 7270325 (2007-09-01), Sano et al.

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