Spectral differential coded card

• US 3,919,447 A
• Filed: 03/20/1974
• Issued: 11/11/1975
• Est. Priority Date: 12/28/1971
• Status: Expired due to Term

• Current Assignee: Charlie C. Kilmer Jr, George J. Laurer
• Original Assignee: Charlie C. Kilmer Jr, George J. Laurer
• Inventors: Kilmer, Charlie C. Jr., Laurer, George J.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Lipsey, Charles E.
• Application Number:
  US05/453,138
• Time in Patent Office: 601 Days
• Field of Search: 117/1,1.5 161/1,4,5,6,36,113,166,254,256,146 40/2.2 235/61.12N,61.11E 283/6,7,8R 340/149A 350/316 250/568,569,271
• US Class Current: 428/138
• CPC Class Codes: B42D 2033/08 Opaque material
• CPC Class Codes: B42D 2033/18 Reflecting material
• CPC Class Codes: B42D 2033/22 Perforated or incised material
• CPC Class Codes: B42D 2033/30 Plastic material
• CPC Class Codes: B42D 2033/32 Other material
• 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 25/21 for multiple purposes
• CPC Class Codes: B42D 25/346 Perforations
• CPC Class Codes: B42D 25/382 absorbing or reflecting infrared light
• CPC Class Codes: B42D 25/45 Associating two or more layers
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: G07F 7/086 by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10
• CPC Class Codes: Y10S 283/904 Credit card
• CPC Class Codes: Y10S 428/916 Fraud or tamper detecting
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• 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 428/24942 including components having same physical characteristic in differing degree

Abstract

A card suitable for use in personal and item identification; the card comprises a first film such as polyvinyl chloride with a transmission bandpass in the infra red region, and either a selectively apertured second film laminated on the first film, or, discrete areas of the second film laminated on preselected areas of the first film. The second film is opaque at a single frequency within the first film bandpass. The films may be formed from the same material but for the trace amounts of a carbonyl group in the structure of the second film polymer, the laminate otherwise being transparent and reflectively uniform in the visible light region.

Claims

1. A CARD OR THE LIKE SUITABLE FOR USE IN PERSONAL AND ITEM IDENTIFICATION COMPRISING:

A FIRST FILM HAVING AN OPTICAL BANDPASS TRANSMISSION FREE FROM SHARP BAND ABSORPTION CHARACTERISTICS IN A PREDETERMINED NON-VISIBLE LIGHT WAVE REGION;

AND A SELECTIVELY APERTURED SECOND FILM LAMINATED UPON THE FIRST FILM AND HAVING A SUBSTANTIALLY SIMILAR SPECTRAL RESPONSE AS THAT OF THE FIRST FILM WITHIN THE PREDETERMINED NON-VISIBLE LIGHT WAVE REGION OF THE FIRST FILM BANDPASS BUT FOR A SHARP BAND ABSORPTION CHARACTERISTIC AT A NEAR SINGLE FREQUENCY, THE LAMINATE INCLUDING THE APERTURED PORTIONS THEREOF FURTHER EXHIBITING A SUBSTANTIALLY UNIFORM TRANSMISSIVITY AND SURFACE REFLECTANCE IN THE VISIBLE LIGHT WAVE REGION.

2. A card or the like suitable for use in personal and item identification comprising:

a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and

a second film having discrete areas laminated upon preselected areas of the first film, said second film discrete areas having a substantially similar spectral response as that of the first film within the predetermined non-visible light wave region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the first film including the portions discretely laminated with the second film further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.

3. A card or the like suitable for use in personal and item identification comprising:

a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined portion of the infra-red region; and

a selectively apertured second film laminated upon the first film and having a substantially similar spectral response as that of the first film within the predetermined portion of the infra-red region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the second film being formed from polymeric material having a carbonyl group and an associated ester group present in the polymer structure, the laminate including the apertured portions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.

4. A card or the like suitable for use in personal and item identification comprising:

a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and

a selectively apertured second film laminated upon the first film and formed from the same material but for the presence of trace amounts of a chemical group in the structure of the second film, the second film exhibiting the same spectral response as the first film within the predetermined non-visible light wave region of the first film bandpass with the exception that the chemical group is sharply spectrally absorptive at a near single frequency, the laminate including the apertured pOrtions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.

5. A card according to claim 4, wherein the chemical group includes a carbonyl group and an associated ester.

6. A card according to claim 4, wherein:

the first film comprises polyvinyl chloride, and the second film comprises polyvinyl chloride vinyl acetate copolymer.

7. A card or the like suitable for use in personal and item identification comprising:

a first polyvinyl chloride film; and

a selectively apertured second polyvinyl chloride film laminated on the first film and having carbonyl groups attached to the second film polymeric structures in a concentration of sufficient magnitude such that its infra-red spectrum shows a distinctive single frequency absorption characteristic lying within the infrared transmission band of the first film, said laminated structure exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.