Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2006-08-01
2006-08-01
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C347S105000
Reexamination Certificate
active
07084418
ABSTRACT:
Recognizing a substrate stock by light-sensitive sensors inside a printing unit, by a sensor that can recognize several ranges of light wavelengths. By separate recognition of various ranges of light wavelengths, a substrate stock is recognized whenever the total reflection capabilities of surface and substrate stock determined across all light wavelengths coincide.
REFERENCES:
patent: 5689425 (1997-11-01), Sainio et al.
patent: 5764251 (1998-06-01), Hashimoto
patent: 5925889 (1999-07-01), Guillory et al.
Jung Eggert Joachim
Luxem Wolfgang Eberhard
Zelenka Thomas
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Locher Ralph E.
Luu Thanh X.
Stemer Werner H.
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