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US 7,404,997 B2Granted
Substrates with multiple images
Assignee3M Innovative Properties Company
InventorsJeffrey O. Emslander, Kenneth B. Wood, Paul L. Acito
Life of this patent
Estimating the term…
Abstract
The present application is directed to a substrate comprising a first major surface comprising light transmitting areas and light shielding areas. A reflective image exists on the light shielding areas of the first major surface of the substrate. A transmitted image exists on the first major surface through the light transmitting areas of the first major surface of the substrate. The substrate is substantially continuous and not specularly transmissive.
Claims21
A substrate comprising
- a first major surface comprising light transmitting areas and light shielding areas, and a second major surface opposite the first major surface, at least one of the first major surface and the second major surface being structured;
- a reflective image on the light shielding areas of the first major surface of the substrate, the reflective image being visible only when illumination is provided from a side adjacent the first major surface of the substrate;
- and
- a transmitted image on the first major surface through the light transmitting areas of the first major surface of the substrate, the transmitted image being visible only when illumination is provided from a side adjacent the second major surface of the substrate;
- wherein the substrate is substantially continuous and not specularly transmissive.
2 more elements
Dependencies are inferred from the claim text.