Transmissive optical sensing of leading edges of media...

Electrophotography – Diagnostics – Document handling

Reexamination Certificate

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Details

C399S371000, C271S003130, C271S010010, C400S708000

Reexamination Certificate

active

06952536

ABSTRACT:
A method of an embodiment of the invention is disclosed that advances media sheets through an image-forming device such that each successive pair of media sheets are advanced at least substantially adjacent to one another. The method transmissively optically senses a leading edge of each of the media sheets and a lagging edge of each of the media sheets. The method detects occurrence of an out-of-media sheets situation where a length of time after the lagging edge of one of the media sheets has been optically sensed exceeds a threshold length of time.

REFERENCES:
patent: 5482265 (1996-01-01), Nakazato et al.
patent: 6076821 (2000-06-01), Embry et al.
patent: 6079892 (2000-06-01), Yamaguchi et al.
patent: 6154621 (2000-11-01), Yamamoto et al.
patent: 6231041 (2001-05-01), Jacques
patent: 6554275 (2003-04-01), Tranquilla
patent: 2002/0044813 (2002-04-01), Barbera et al.

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