Patent US6822769B1 successfully refreshed from Google Patents.
US6822769B1
Expired / Lapsed
US
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Security device
Assignee: De la Rue International Ltd
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Filing: 2000-05-30
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Granted: 2004-11-23
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Expires: 2020-05-30
Abstract
Abstract A security device includes a holographic optically variable effect generating structure having at least two discrete section. The sections that generate in response to white light illumination an optically variable image having at least two defined graphical elements located at or near an image plane either on or adjacent to the plane of the device. In response to coherent illumination, the sections generate at least two discrete covert images, in the form of indicia, whose image planes are located at a distance away from the real place of the device. The covert images are reconstructed at different angles to a normal to a substrate supporting the device such that the covert images are spatially separated on their image plane, the covert images being non-visible under white light illumnination.
Inventors
- 👤 Kenneth John Drinkwater
- 👤 Brian William Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:03
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/328; G; G03; G03H; G03H1/00; G03H1/0005; G03H1/0011; G03H1/22; G03H1/24; G03H1/26; G03H1/28; G03H1/30; G07; G07D; G07D7/00; G07D7/003; G07D7/0032; G07F; G07F7/00; G07F7/08; G07F7/086; G03H1/2645; G03H1/265; G03H2001/0016; G03H1/2249; G03H2001/2263; G03H2001/2268; G03H2001/2665; G03H2001/303; G03H2210/00; G03H2210/50; G03H2210/52; G03H2210/53; G03H2230/00; G03H2230/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
191 words
A security device comprising a holographic optically variable effect generating structure having at least two discrete sections, wherein each section generates, in response to white light illumination, a) an optically variable image consisting of at least one defined graphical element located at or near a first image plane either on or adjacent to a plane of the device, and b) at least one discrete covert image, in the form of indicia, in a second image plane located at a distance away from a physical plane of the device such that the at least one discrete covert image is substantially non-visible to the observer; and wherein each section generates, in response to coherent, visible illumination, a) the optically variable image, and b) at least one discrete covert image, the at least one discrete covert image being visible to the observer in the second image plane, the at least one discrete covert image from each of the at least two discrete sections being reconstructed at different angles to a substrate supporting device such that the covert image from each of the at least two discrete sections are spatially separated on the image plane.
Claim 2
Dependent Claim
191 words
A security device comprising a holographic optically variable effect generating structure having at least two discrete sections, wherein each section generates, in response to white light illumination, a) an optically variable image consisting of at least one defined graphical element located at or near a first image plane either on or adjacent to a plane of the device, and b) at least one discrete covert image, in the form of indicia, in a second image plane located at a distance away from a physical plane of the device such that the at least one discrete covert image is substantially non-visible to the observer; and wherein each section generates, in response to coherent, visible illumination, a) the optically variable image, and b) at least one discrete covert image, the at least one discrete covert image being visible to the observer in the second image plane, the at least one discrete covert image from each of the at least two discrete sections being reconstructed at different angles to a substrate supporting device such that the covert image from each of the at least two discrete sections are spatially separated on the image plane.
Claim 3
Dependent Claim
32 words
A device according to claim 1 , wherein the optically variable effect generating structure generates an optically variable image in response to white light illumination which moves as the device is tilted.
Claim 4
Dependent Claim
21 words
A device according to claim 1 , wherein the optically variable effect generating structure is formed as a single continuous structure.
Claim 5
Dependent Claim
27 words
A device according to claim 3 , wherein each element of the holographic optically variable effect generating structure has a maximum lateral dimension not exceeding 3 mm.
Claim 6
Dependent Claim
27 words
A device according to claim 4 , wherein each element of the holographic optically variable effect generating structure has a maximum lateral dimension not exceeding 1.5 mm.
Claim 7
Dependent Claim
52 words
A device according to claim 3 , wherein a number of pairs or sets of at least three of said sections are provided, each member of a pair or sets being arranged to generate the same covert image in response to coherent illumination as the other member(s) of the pair or set.
Claim 8
Dependent Claim
54 words
A device according to claim 3 , wherein the single holographic optically variable effect generating structure is located within a set of further optically variable effect generating structures, wherein the single and further optically variable effect generating structures, on tilting the substrate under white light illumination, cooperative together to generate a moving image effect.
Claim 9
Dependent Claim
21 words
A device according to claim 1 , wherein the optically variable effect generating structure sections are formed as discrete spaced areas.
Claim 10
Dependent Claim
32 words
A device according to claim 8 , wherein the device includes a number of pairs or sets of said areas, each member of the pair or set having substantially the same construction.
Claim 11
Dependent Claim
19 words
A device according to claim 8 , wherein each area has a maximum lateral dimension not exceeding 3 mm.
Claim 12
Dependent Claim
19 words
A device according to claim 10 , wherein each area has a maximum lateral dimension not exceeding 1.5 mm.
Claim 13
Dependent Claim
28 words
A device according to claim 1 , wherein the optically variable effect generating structure is a security hologram in the form of a diffraction grating or holographic structure.
Claim 14
Dependent Claim
36 words
A device according to claim 12 , wherein the part of the structure which responds additionally to coherent illumination has a grating frequency less than the part of the structure which responds to white light illumination.
Claim 15
Dependent Claim
19 words
A device according to claim 1 , wherein the optically variable effect generating structure is a surface relief structure.
Claim 16
Dependent Claim
25 words
A device according to claim 1 , wherein the covert images comprise graphical elements, alphanumeric characters, logos, or machine readable patterns such as bar codes.
Claim 17
Dependent Claim
21 words
A device according to claim 15 , wherein each section generates a covert image defining part of the machine readable pattern.
Claim 18
Dependent Claim
15 words
A device according to claim 1 , wherein the sections have substantially the same shape.
Claim 19
Dependent Claim
31 words
A device according to a claim 1 , wherein the sections have a simple geometrical shape, the geometrical shape includes at least one of a circle, a square or a rectangle.
Claim 20
Dependent Claim
15 words
A device according to claim 1 , wherein the sections are shaped as graphical indicia.
Claim 21
Dependent Claim
13 words
A device according to claim 19 , wherein the sections define alphanumeric characters.
Claim 22
Dependent Claim
24 words
A device according to claim 1 , wherein the device has been holographically originated through a Benton-type H 1 to H 2 transfer arrangement.
Claim 23
Dependent Claim
15 words
A document or article of value carrying a security device according to claim 1 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-11-23 | 2008-05-24 | 2008-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-23 | 2012-05-24 | 2012-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-23 | 2016-05-24 | 2016-11-23 | $7700.00 | Window Closed / Lapsed |