# US 2013/0252008 A1 · Secure product and method of producing said secure product

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- Number: US 2013/0252008 A1
- Document ID: US20130252008A1
- Status: Published application
- Kind: A1
- Application number: 13/992,495
- Filed: 2011-12-06
- Published: 2013-09-26
- Earliest claimed: 2010-12-07
- Assignees: Hologram.Industries
- Inventors: Valéry Petiton; Françoise Daniel
- Web page: https://patentgrep.com/patent/US20130252008A1

## CPC

- B42D 25/47: using adhesives
- B32B 29/00: Layered products comprising {a layer of} paper or cardboard
- B42D 25/00: Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14)
- B32B 2264/10: Inorganic particles
- B32B 2307/40: having particular optical properties
- B32B 2425/00: Cards, e.g. identity cards, credit cards
- B42D 25/328: Diffraction gratings; Holograms
- B42D 2033/04
- B42D 2033/18
- B42D 2035/34
- Y10T 428/31993: Of paper
- B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A secure product, and a production method, comprising a first reflective layer, a second layer and a third layer including readable information, the first layer being enclosed between the second and the third layers, in which the first and second layers are transparent, at least a first part of the internal surface of the second layer comprises a diffusing microstructure, and the diffusing microstructure is positioned so as to cover a predetermined part of the readable information.

## Claims

### Claim 1

A multilayer product intended for securing readable information, Comprising:
a first reflective layer;
a carrier; and
a second layer enclosed between the first layer and the carrier, wherein:
the first and the second layers are transparent, and
at least a first part of the surface of the second layer opposite the carrier comprises a diffusing microstructure.

### Claim 2 (depends on 1)

The multilayer product as claimed in claim 1, wherein the carrier is detachable from the second layer.

### Claim 3 (depends on 1)

The multilayer product as claimed in claim 1, wherein a second part of the surface of the second layer opposite the carrier comprises at least one diffractive microstructure.

### Claim 4 (depends on 1)

The multilayer product as claimed in claim 1, wherein the first layer comprises at least one component chosen from zinc sulfide or titanium dioxide.

### Claim 5

A secure product comprising a first reflective layer, a second layer and a third layer including readable information, the first layer being enclosed between the second and the third layers, wherein:
the first and second layers are transparent,
at least a first part of the internal surface of the second layer comprises a diffusing microstructure, and
the diffusing microstructure is positioned so as to cover a predetermined part of the readable information.

### Claim 6 (depends on 5)

The secure product as claimed in claim 5, wherein the diffusing microstructure creates a refractive index gradient at the interface of the first and second layer.

### Claim 7 (depends on 5)

The secure product as claimed in claim 5, wherein the third layer comprises paper.

### Claim 8 (depends on 5)

The secure product as claimed in claim 5, wherein the first layer comprises at least one component chosen from zinc sulfide or titanium dioxide.

### Claim 9 (depends on 5)

The secure product as claimed in claim 5, wherein a second part of the internal surface of the second layer comprises at least one diffractive microstructure.

### Claim 10

A method for producing a multilayer product intended for securing readable information, the product comprising a first reflective transparent layer, a carrier and a second transparent layer enclosed between the first layer and the carrier, the method comprising:
the deposition of the second layer onto the carrier;
the formation of a diffusing microstructure on at least a first part of the surface of the second layer opposite the carrier; and
the deposition of the first layer onto the second layer thus provided with the diffusing microstructure.

### Claim 11 (depends on 10)

The method as claimed in claim 10, in which the formation of the diffusing microstructure is carried out by stamping of the second layer.

### Claim 12 (depends on 10)

The method as claimed in claim 10, further comprising the formation of a diffractive microstructure on at least a second part of the surface of the second layer opposite the carrier.

### Claim 13 (depends on 1)

A method for producing a secure product comprising a first reflective transparent layer, a second transparent layer and a third layer including readable information, the method comprising:
the provision of a multilayer product as claimed in claim 1 4;
the bonding of the third layer onto the multilayer product; and
the detachment of the carrier following said bonding.