Updatable micrographic pocket data card

• US 4,814,594 A
• Filed: 07/07/1987
• Issued: 03/21/1989
• Est. Priority Date: 11/22/1982
• Status: Expired due to Term

• Current Assignee: LaserCard Corp. (Assa Abloy AB)
• Original Assignee: Drexler Technology Corporation (Assa Abloy AB)
• Inventors: Drexler, Jerome
• Primary Examiner(s): Pellinen, A. D.
• Assistant Examiner(s): Fuller, Leon K.
• Application Number:
  US07/070,837
• Time in Patent Office: 623 Days
• Field of Search: 235/454, 235/484, 235/487, 235/488, 283/67, 283/70, 283/74, 346/76 L, 346/135.1
• US Class Current: 235/487
• CPC Class Codes: B42D 2033/04 Transparent material
• CPC Class Codes: B42D 2033/10 Metallic material
• CPC Class Codes: B42D 2033/30 Plastic material
• CPC Class Codes: B42D 2035/02 Nature of the markings
• CPC Class Codes: B42D 2035/08 Alphanumerical data
• CPC Class Codes: B42D 2035/14 Dot or raster patterns
• CPC Class Codes: B42D 2035/20 Optical effects
• CPC Class Codes: B42D 2035/44 Miniaturised markings
• 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 25/20 characterised by a particular use or purpose
• CPC Class Codes: B42D 25/28 for use in medical treatment or therapy
• CPC Class Codes: B42D 25/41 using electromagnetic radiation B42D25/435 takes precedence
• CPC Class Codes: B42D 25/435 using electromagnetic radiation, e.g. laser
• CPC Class Codes: B42D 25/47 using adhesives
• CPC Class Codes: G06K 1/126 by photographic or thermographic registration recording apparatus for measuring instruments G01D15/00
• CPC Class Codes: G06K 19/06009 with optically detectable marking G06K19/063, G06K19/08 take precedence
• CPC Class Codes: G06K 19/08 using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
• CPC Class Codes: G07C 9/25 using biometric data, e.g. fingerprints, iris scans or voice recognition
• CPC Class Codes: G11B 7/003 with webs , filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
• CPC Class Codes: G11B 7/0033 with cards or other card-like flat carriers, e.g. flat sheets of optical film
• CPC Class Codes: G11B 7/24 : Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: Y10S 283/904 : Credit card

Abstract

A strip of optical contrast laser recording material is disposed on the wallet-size card, and has laser written characters recorded thereon. The characters are formed by a plurality of pixels, similar in nature to the dots forming dot matrix characters, except that the pixels themselves are formed of spots. The spots are disposed in a geometric regular array and are usually written one column at a time until a complete pixel is formed. Machine readable and visually readable characters may be combined on a single data strip.

Claims

1. An updatable micrographic data card comprising,

a wallet size card having a strip of optical contrast laser recording material disposed thereon,

a plurality of laser written characters disposed on said strip, each character formed from a plurality of laser recorded character pixels, each pixel formed by a uniform array of laser recorded spots aligned in a matrix of rows and columns, said laser recorded spots being a first level of organization to form characters and which are written line by line at designated locations where said uniform arrays of spots forms said pixels, said pixels being a second level of organization, said characters being a third level of organization which have a character height exceeding one millimeter and being laser recordable in place on the card wherever unused areas of the recording material exist.

2. The card of claim 1 wherein said array of laser recorded spots is a uniform pattern of four or more spots.

3. The card of claim 1 wherein said strip has a width substantially equal to the width of the card.

4. The card of claim 1 wherein machine readable indicia is disposed on said strip.

5. The card of claim 1 further having a plurality of laser written micrographic characters disposed on the strip, each character formed of a matrix of laser recorded spots aligned in rows and columns, said micrographic characters being eye readable using at least 20 power magnification, but not eye readable using 5 power magnification or less.

6. The card of claim 1 further having machine readable indicia disposed on said strip and also having a plurality of laser written micrographic characters disposed on the strip, each micrographic character formed of a matrix of laser recorded spots aligned in rows and columns, said micrographic characters being eye readable using at least 20 power magnification, but not eye readable using 5 power magnification or less.

7. A method of laser writing of eye readable characters comprising,

writing in a scan-like manner a plurality of spots with a laser in groups forming uniform pixels, said spots being a first level of organization to form characters, said spots being aligned in rows and columns and being written line by line at designated locations where said uniform arrays of spots forms said pixels, said pixels being a second level of organization,

grouping pixels in juxtaposed relation forming eye readable characters, said characters being a third level of organization in forming said characters.

8. The method of claim 7 further defined by writing said spots in a rectangular array of rows and columns.

9. The method of claim 8 further defined by writing said spots in an array of more than 24 spots.

10. The method of claim 7 further defined by

(a) grouping pixels in linear positions for forming a portion of a character beneath a laser, then

(b) moving the card relative to the laser and forming the next adjacent portion of a character, then

(c) repeating card movement until the character is completion.

11. The method of claim 7 further defined by writing said spots with a diode laser.