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US 9,791,604 B2Granted
Retroreflective articles including optically active areas and optically inactive areas
Assignee3M Innovative Properties Company
InventorsMichael Benton Free, Mieczyslaw H. Mazurek, Bimal V. Thakkar, Kenneth L. Smith, Suman K. Patel, William D. Coggio, Mikhail L. Pekurovsky, Raymond C. Chiu
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Abstract
This disclosure generally relates to retroreflective articles and methods of making such articles.
Claims3
A method of forming a retroreflective article, comprising:
- providing a retroreflective layer including a structured surface that is opposite a second major surface;
- providing a structured adhesive layer having raised areas and unraised areas, wherein at least some of the unraised areas further include barrier layers;
- and
- attaching the structured adhesive layer to the structured surface such that the raised areas are in contact with the structured surface and the unraised areas are not in contact with the structured surface.
1 more element
Dependencies are inferred from the claim text.