Printing – Printing members – Rolling contact
Reexamination Certificate
2011-05-03
2011-05-03
Nguyen, Judy (Department: 2854)
Printing
Printing members
Rolling contact
C101S401000, C492S008000
Reexamination Certificate
active
07934451
ABSTRACT:
A printing apparatus includes a magnetic rotatable roller with a smooth even outer surface for aligning magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank notes. Magnetic flakes in the ink are aligned using magnetic portions of the roller, that can be formed by permanent magnets embedded in a non-magnetic roller body, or selectively magnetized portions of a flexible magnetic cover of the roller. In some embodiments, the roller is assembled for a plurality of interchangeable sections, which can include spinning magnets. Selected orientation of the magnetic pigment flakes can achieve a variety of illusive optical effects that are useful for decorative or security applications.
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Coombs Paul G.
Holman Jay M.
Markantes Charles T.
Phillips Roger W.
Raksha Vladimir P.
Hinze Leo T
JDS Uniphase Corporation
Nguyen Judy
Pequignot Matthew A.
Pequignot & Myers LLC
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