Back to results
US 2012/0075701 A1Published application
Optically variable security devices
OwnerRoger W. Phillips, Thomas Mayer +2inventors
InventorsRoger W. Phillips, Thomas Mayer, Scott Lamar, Elena Taguer
Life of this patent
Estimating the term…
Abstract
An optical device is formed by hot stamping a demetallized hologram to an optically variable foil or to a coating of optically variable ink. In another embodiment a hologram is hot stamped to a banknote or document printed with a color-shifting ink.
Claims24
A method of manufacturing a device for providing an image having an optically variable feature, comprising:
- a) providing a diffractive structure for forming at least a portion of the image;
- b) providing an optically variable structure separate from the diffractive structure, for providing the optically variable feature to the image;
- c) covering the diffractive structure or the optically variable structure with an adhesive, wherein the adhesive comprises energy activated binder;
- and
- d) after steps (a)-(c), activating the adhesive and coupling the diffractive structure and optically variable structure together in a predetermined mutual arrangement, wherein the energy activated binder forms an adhesive layer.
2 more elements
A method for forming a device comprising the steps of:
- a) providing a substrate with an optically variable coating thereon;
- b) covering the optically variable coating with an adhesive;
- c) providing a hologram adjacent to the adhesive;
- and
- d) hot stamping the hologram and substrate together by heating the adhesive while applying pressure to the hologram and substrate.
2 more elements
Dependencies are inferred from the claim text.