Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic
Reexamination Certificate
2006-10-10
2006-10-10
Colilla, Daniel J. (Department: 2854)
Incremental printing of symbolic information
Electric marking apparatus or processes
Electrostatic
C101S481000, C235S462010
Reexamination Certificate
active
07119820
ABSTRACT:
A scanning head for use in a register mark detection apparatus for detecting register marks on a web during relative movement between the web and the scanning head. The scanning head comprises an optical sensor and a first optical mask spaced from the optical sensor and having an aperture therethrough to define the viewing footprint of the optical sensor. In some embodiments, the scanning head also includes a second optical mask in series with the first optical mask. The scanning head is versatile and capable of operating with high sensitivity and accuracy even with low contrast media, including with embossed or relief marks, or for fold-line registration or with translucent media.
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Colilla Daniel J.
Ferguson-Samreth Marissa
Michael & Best & Friedrich LLP
Quad/Tech Inc.
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