Patent ID: 8773763
Filing Date: 2014-07-08
Classification: B29D,B42D,D21H,G02B,G03H,G09F,Y10T

Abstract:
1. A tamper indicating security device which comprises an optical film material that is made up of at least one layer containing focusing elements and at least one layer containing microstructured image elements, the focusing element and image element layers configured such that when the at least one layer containing image elements is viewed through the at least one layer containing focusing elements, one or more synthetic images are produced, the device being adhered or bonded to a base material, wherein the device separates between layers or within a layer when an attempt is made to detach the device from the base material, rendering the device partially or totally inoperable, wherein the microstructured image elements are in the form of: (a) voids or recesses in a polymeric substrate; (b) raised areas or shaped posts; or (c) a combination of (a) and (b).