Overlapped-sheet detection apparatus

Details Overlapped-sheet detection apparatus Overlapped-sheet detection apparatus

2007-09-11

2007-09-11

Mackey, Patrick (Department: 3653)

Sheet feeding or delivering

Feeding

With means to interrupt feeding

C271S263000, C271S125000

Reexamination Certificate

active

11395170

ABSTRACT:
An overlapped-sheet detection apparatus can detect whether sheets are overlapped and shift the same, if overlapped, for further processing. The overlapped-sheet detection apparatus is provided with conveying belts, forwarding and shifting rollers, motor and discriminator. Conveying belts hold and convey sheets on a conveying path. Forwarding roller is provided at the conveying path to forward sheets in a conveying direction and forward sheets in conveying direction. Shifting roller is provided opposite to forwarding roller to shift sheets back to a direction which is the reverse of conveying direction if the sheets are overlapped. Motor supplies shifting roller with driving torque to shift sheets back to the direction reversed to conveying direction. An encoder is built in motor to detect a rotation state of shifting roller. Discriminator judges from an output of the encoder whether sheets are overlapped. When sheets are overlapped, forwarding roller makes contact with upper sheet and sends the same in conveying direction but shifting roller shifts lower sheet in a direction reversed to conveying direction.

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English Abstract for JP 3-191493.
English Abstract for JP 2-204251.

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