Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2006-02-14
2006-02-14
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C250S231130
Reexamination Certificate
active
06998631
ABSTRACT:
An optoelectronic sensing device detects two contrasting marks arranged next to each other along two reading tracks on a moving web. An optical head is arranged above each reading track. Each head has a lighting source and a lens, by means of which the contrast marks are imaged on an associated light receiver. Information from the contrast mark is obtained from the output signal of the light receiver. An adjustable connector joins two substantially identical optical heads to each other so that their respective lenses are arranged asymmetrically in the associated optical head and are situated in immediate proximity to each other, which permits adjustment of the device for the smallest possible track spacings.
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Hirt Guenter
Opfolter Matthias
Ko Tony
Porta David
Sick AG
Townsend and Townsend / and Crew LLP
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