US 10,889,139 B2
Security document with attached security device which demonstrates increased harvesting resistance
Giles D. Prett, Dalton, MA (US); Kraig M. Brigham, Lenox, MA (US); and Manish Jain, Pittsfield, MA (US)
Assigned to Crane & Co., Inc., Boston, MA (US)
Filed by Crane & Co., Inc., Boston, MA (US)
Filed on Jul. 3, 2019, as Appl. No. 16/503,273.
Claims priority of provisional application 62/693,661, filed on Jul. 3, 2018.
Prior Publication US 2020/0009894 A1, Jan. 9, 2020
Int. Cl. B42D 25/346 (2014.01); B42D 25/324 (2014.01); B42D 25/36 (2014.01); G07D 7/164 (2016.01); G07D 7/0047 (2016.01); B42D 25/29 (2014.01)
CPC B42D 25/346 (2014.10) [B42D 25/29 (2014.10); B42D 25/324 (2014.10); B42D 25/36 (2014.10); G07D 7/0047 (2017.05); G07D 7/164 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A security document, comprising:
a security substrate;
a security device,
wherein the security device comprises an array of image icons, an optical spacer and an array of focusing elements, wherein the array of focusing elements projects a synthetically magnified image of image elements within the array of image icons,
wherein the array of focusing elements is disposed on the optical spacer and comprises a polymeric material; and
a structural weakness element,
wherein the security device is coupled to the security substrate,
wherein the structural weakness element comprises a set of perforations extending through the array of focusing elements,
wherein the structural weakness element is not visible in reflected light; and
wherein the structural weakness element does not affect the synthetically magnified image of image elements projected by the array of focusing elements.