Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2007-04-17
2007-04-17
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C250S559160, C356S431000, C347S019000
Reexamination Certificate
active
10812340
ABSTRACT:
An imaging apparatus includes a media support surface. A light source and a light detector are positioned in relation to a reflective surface such that when a sheet of print media covers the reflective surface, a reflected specular light component of a light beam is received by the light detector, and when the reflective surface is not covered, the reflective surface directs the reflected specular light component of the light beam away from the detector. The signal strength of the output from the light detector when receiving a diffuse light component reflected from the reflective surface is less than the signal strength of the output from the light detector when receiving the reflected specular light component that is reflected from a low reflectance print media.
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Chelvayohan Mahesan
Simpson Charles Jarratt
Smith Herman Anthony
Epps Georgia
Lexmark International Inc.
Taylor & Aust
Williams Don
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