Sheet feeder and jam detecting method

Details Sheet feeder and jam detecting method Sheet feeder and jam detecting method

2011-04-19

2011-04-19

Nguyen, Judy (Department: 2854)

Electrophotography

Diagnostics

Document handling

C399S009000, C399S016000, C399S361000

Reexamination Certificate

active

07929869

ABSTRACT:
A transporter is adapted to transport a sheet in a transport direction in a transport path that includes a detecting range. A measurer is disposed at an upstream end of the detecting range in the transport direction, and is operable to measure a moving distance of the sheet. A detector is disposed at a downstream end of the detecting range in the transport direction, and is operable to detect a leading end edge of the sheet. A processor is operable to detect a jam in case that the moving distance is longer than a distance of the detecting range in the transport direction while the leading end edge of the sheet is not detected by the detector.

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