MAGNETICALLY CODED CARD STRUCTURE

• US 3,651,312 A
• Filed: 02/10/1969
• Issued: 03/21/1972
• Est. Priority Date: 06/30/1967
• Status: Expired due to Term

• Current Assignee: Walter W. Barney
• Original Assignee: Walter W. Barney
• Inventors: Barney, Walter W.
• Primary Examiner(s): Robinson, Thomas A.
• Application Number:
  US04/797,868
• Time in Patent Office: 1,135 Days
• Field of Search: 235/61.12 340/149 346/74M
• US Class Current: 235/488
• CPC Class Codes: B42D 2033/08 Opaque material
• CPC Class Codes: B42D 2033/16 Magnetic or magnetisable material
• CPC Class Codes: B42D 2033/22 Perforated or incised material
• CPC Class Codes: B42D 2035/02 Nature of the markings
• CPC Class Codes: B42D 2035/34 Markings visible under particular conditions or containing coded information
• 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 25/346 Perforations
• CPC Class Codes: B42D 25/369 Magnetised or magnetisable materials
• CPC Class Codes: B42D 25/40 Manufacture
• CPC Class Codes: B42D 25/45 Associating two or more layers
• CPC Class Codes: B42D 25/455 using heat
• CPC Class Codes: B42D 25/46 using pressure
• CPC Class Codes: B42D 25/475 Cutting cards
• CPC Class Codes: G06K 19/12 the marking being sensed by magnetic means
• CPC Class Codes: G06K 7/087 flux-sensitive, e.g. magnetic, detectors G06K7/10336 takes precedence

Abstract

A monolithic card is formed of three plastic sheets bonded together, wherein the center sheet has a plurality of holes, each filled with a magnetic disc adapted to be axially poled. The center sheet is punched at one station, then located at a second station beneath a flexible card of magnetic material, and with its holes aligned with respective punches which simultaneously punch discs from the card and force them into holes. The center and outer sheets are stacked, and bonded under heat and pressure. The discs are magnetized with polarities at one card face distributed in a desired pattern.

Claims

1. In combination:

an opaque card formed of a center layer of nonmagnetic material between two layers of opaque, non-magnetic material, said center layer having a plurality of spaced openings therethrough;

respective permanent magnets in said openings, said magnets being of the same thickness as said center layer, said magnets being resilient elements frictionally and resiliently engaging the walls of the openings in which they are located, each magnet being so poled that its opposite surfaces are of opposite polarities, whereby said magnets are poled along lines perpendicular to the opposite surfaces of said center layer, the polarities of some of the magnets at each surface of said center layer being north poles and the remainder being south poles, said north and south poles at each surface of said center layer being in a predetermined pattern, the field of each magnet outside the card surfaces being sufficiently strong to operate a respective magnet responsive device when the card is placed in a stationary position adjacent the device, and said magnets being characterized in that the polarities thereof at the card faces are not alterable or erasable by an opposite magnet pole brought or moved adjacent thereto.

2. The combination of claim 1, wherein said openings are circular and said magnets are disc magnets.