Patent EA-001134-B1 (EA)
Title: Article with holographic and retroreflective features
Inventor: LORIMOR LYNN E
IPC: B32B7/02
Filed: 1997-01-13
Abstract: 1. An article differently perceptible under normal lighting conditions and under retroreflective lighting conditions comprising:  (a) a transparent holographic layer perceptible under normal lighting conditions, and substantially imperceptible to the unaided eye under retroreflective lighting conditions;  (b) a retroreflective layer perceptible under retroreflective lighting conditions; and  (c) an indicia layer. 2. The article of claim 1, wherein the retroreflective layer comprises a plurality of cube corner retroreflective elements. 3. The article of claim 2, wherein the article includes a holographic layer with a structured layer and a substantially transparent reflector layer. 4. The article of claim 3, wherein the transparent layer of a reflector is an interrupted pattern from a reflecting material. 5. The article of claim 3, wherein the transparent reflective layer is made of material with high refrective index. 6. The article of claim 3, wherein an indicia pattern is formed in parts of the retroreflective layer having cube corner retroreflective elements, and substantially imperceptible to the unaided eye under retroreflective lighting conditions, but is perceptible under retroreflective lighting conditions. 7. The article of claim 3, wherein the holographic layer overlies the retroreflective layer. 8. The article of claim 1, wherein the article further includes at least one of a cover film, a tie layer, an adhesive layer, a heat-shrink layer, and a patterned coating layer with differential adhesion. 9. The article of claim 1, wherein the article includes a holographic layer with a structured layer and a substantially transparent reflector layer, and a retroreflective layer with glass microspheres in a spacing resin with a reflector on the spacing resin. 10. The article of claim 9, wherein the reflector on the spacing resin is substantially transparent. 11. The article of claim 9, wherein a patterned coating layer with differential adhesion is disposed between the holographic layer and the retroreflective layer. 12. The article of claim 9, wherein an angular indicia pattern is formed in the retroreflective layer which is substantially imperceptible to the unaided eye under normal lighting conditions, but is perceptible under retroreflective lighting conditions. 13. The article of claim 9, wherein the retroreflective layer includes glass micro spheres that are dispersed in a colored beadbond resin. 14. The article of claim 13, wherein a colored indicia pattern is disposed between the holographic layer and the retroreflective layer so that the colored indicia is substantially imperceptible to the unaided eye under normal lighting conditions, but is perceptible under retroreflective lighting conditions. 15. The article of claim 9, further including a cover film on the front of the holographic layer and a patterned coating layer with differential adhesion disposed between the cover film and the holographic layer. 16. The article of claim 1, wherein the indicia pattern is disposed between the holographic and retroreflective layers. 17. The article of claim 1, wherein the indicia pattern is made of a material contrasting by brightness against the background under retroreflective lighting conditions. 18. The article of claim 1, wherein further comprising: d) the patterned layer with differential adhesion, and  e) the adhesive layer disposed under the patterned layer with differential adhesion for bonding the article to a surface.