Identity card with grid images

• US 4,304,809 A
• Filed: 10/07/1979
• Issued: 12/08/1981
• Est. Priority Date: 12/14/1978
• Status: Expired due to Term

• Current Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Moraw, Roland, von dem Bussche, Gotz
• Primary Examiner(s): HERBERT JR, THOMAS
• Application Number:
  US06/101,182
• Time in Patent Office: 793 Days
• Field of Search: 428/195, 428/915, 428/916, 428/201, 428/203, 428/213, 427/7, 204/15, 204/286, 430/11
• US Class Current: 428/195.1
• CPC Class Codes: B42D 2033/04 Transparent material
• CPC Class Codes: B42D 2033/14 Photosensitive material
• CPC Class Codes: B42D 2033/24 Reliefs or indentations
• CPC Class Codes: B42D 2035/02 Nature of the markings
• CPC Class Codes: B42D 2035/06 Picture of the user
• CPC Class Codes: B42D 2035/08 Alphanumerical data
• CPC Class Codes: B42D 2035/16 Bars or lines
• CPC Class Codes: B42D 2035/20 Optical effects
• CPC Class Codes: B42D 2035/44 Miniaturised markings
• CPC Class Codes: B42D 2035/50 Corresponding markings appearing in different shapes or at different places
• CPC Class Codes: 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
• CPC Class Codes: B42D 25/23 Identity cards
• CPC Class Codes: B42D 25/309 Photographs
• CPC Class Codes: B42D 25/318 Signatures
• CPC Class Codes: B42D 25/324 Reliefs
• CPC Class Codes: B42D 25/328 Diffraction gratings; Holograms
• CPC Class Codes: B42D 25/351 Translucent or partly translucent parts, e.g. windows
• CPC Class Codes: B42D 25/41 using electromagnetic radiation B42D25/435 takes precedence
• CPC Class Codes: B42D 25/45 Associating two or more layers
• CPC Class Codes: G06K 19/16 the marking being a hologram or diffraction grating
• CPC Class Codes: Y10S 283/904 : Credit card
• CPC Class Codes: Y10S 428/916 : Fraud or tamper detecting
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24851 : Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/24868 : Translucent outer layer
• CPC Class Codes: Y10T 428/2495 : Thickness [relative or absolute]

Abstract

Disclosed is an identity card having grid images thereon comprised of a linear grid structure. In various embodiments, the grid depths of the individual grid images differ and can produce several different image colors. The card in a further embodiment can comprise a number of layers which are laminated together around a card core which has a window located therein. A number of variations of grid images can be included and/or superposed in the window in order to provide a security identification system which is extremely difficult to forge. Also disclosed are numerous combinations of grid structures some of which include grid images which may be absorption images and/or phase images.

Claims

1. An identity card comprising:

at least one layer, said layer including a window therein;

a grid carrier located in said window, said grid image carrier comprising means for defining at least one grid image, said grid image having a linear grid structure of different depths, said grid image comprising means for producing during readout by light transmission during reconstruction at least one colored information; and

means for carrying information identifying a cardholder, said grid images comprising at least one linear grid structure as protection against forgery.

2. An identity card according to claim 1, wherein said grid images are absorption images.

3. An identity card according to claim 1, wherein said grid images are phase images.

4. An identity card according to claim 1, wherein said grid images are both absorption images and phase images.

5. An identity card according to claim 1, wherein said grid images include grid structures having a period length of less than 1/400 mm.

6. An identity card according to claim 1, wherein the grid images are comprised of phase images having a relief grid structure.

7. An identity card according to claim 1, wherein said card comprises a plurality of layers.

8. An identity card according to claim 7, wherein said grid image comprises a plurality of superposed part images.

9. An identity card according to claim 8, wherein each of said part images have grid structures which differ from one another in at least one of their dimensions and orientations.

10. An identity card according to claim 7, wherein one of said layers comprises a card core, said card core including means defining a window.

11. An identity card according to claim 10, wherein said grid image carrier has said grid images applied thereto.

12. An identity card according to claim 10, wherein the grid image carrier extends beyond said window.

13. An identity card according to one of claims 10 to 12, wherein said plurality of layers includes at least two transparent films laminated on each side of said card core, said card further includes means for reinforcing said window, said reinforcing means comprising at least one transparent film insert capable of lamination.

14. An identity card according to one of claims 10 to 12, wherein said plurality of layers includes at least two transparent films laminated on each side of said card core, said card further includes means for reinforcing said window, said reinforcing means comprising at least one transparent film insert not capable of lamination.

15. An identity card according to one of claims 10 to 12, wherein said window has a diameter and said grid images include grid structures having a period length which is not less than the diameter of said window.

16. An identity card according to one of claims 10 to 12, wherein said window has a diameter and said grid images include grid structures having a period length smaller than the diameter of said window.