Magnetic-type information card and method and apparatus for encoding and reading
First Claim
1. A flexible resilient magnetic particle type information card capable of correctly reading information thereon after such card has been bent back double on itself and creased at the region of the card that includes the magnetic particles, said card comprising a flexible base, a layer of uniformly distributed magnetic particles thereon, and a flexible overlayer of nonmagnetic material, said overlayer having a thickness of at least 2 mils, said layer of magnetic particles being magnetically digitally encoded, consecutive equal portions of said layer having one polarity of magnetic flux or the opposite polarity, with abrupt magnetic flux transitions between oppositely polarized portions, the magnetic flux transitions of such encoding being at least 0.02 inch apart and said magnetic particle layer being enclosed between the base layer and overlayer and spaced from the edges of the card.
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Accused Products
Abstract
A flexible resilient magnetic particle type information card capable of correctly reading information thereon after such card has been bent double on itself and creased, said card comprising a flexible base, a layer of uniformly distributed magnetic particles thereon, and a flexible overlayer of nonmagnetic material, said over layer having a thickness of at least 2 mils, said layer of magnetic particles being magnetically encoded, the magnetic flux transitions of such encoding being at least 0.02 inch apart and said magnetic particle layer being enclosed between the base layer and over layer and spaced from the edges of the card.
A method of storing information in binary data form comprising magnetically recording information on a magnetic strip that has an over layer of at least 2 mils by inducing transitions in the magnetization of the strip at a minimum spacing of 0.02 - 0.1 inch.
A magnetic information card and card reader system comprising the magnetic information card described above in combination with a card reader having a slot accommodating the card in a tight but not binding fit and a structural portion of the reader having a hole forming a relief opposite the reading head of the reader.
141 Citations
27 Claims
- 1. A flexible resilient magnetic particle type information card capable of correctly reading information thereon after such card has been bent back double on itself and creased at the region of the card that includes the magnetic particles, said card comprising a flexible base, a layer of uniformly distributed magnetic particles thereon, and a flexible overlayer of nonmagnetic material, said overlayer having a thickness of at least 2 mils, said layer of magnetic particles being magnetically digitally encoded, consecutive equal portions of said layer having one polarity of magnetic flux or the opposite polarity, with abrupt magnetic flux transitions between oppositely polarized portions, the magnetic flux transitions of such encoding being at least 0.02 inch apart and said magnetic particle layer being enclosed between the base layer and overlayer and spaced from the edges of the card.
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14. An information card comprising a base, a layer of magnetic particles thereon and an over layer of nonmagnetic material, said over layer having a thickness of 2-30 mils and said magnetic particle layer being magnetically digitally encoded, consecutive equal portions of said layer having one polarity of magnetic flux or the opposite polarity, with abrupt magnetic flux transitions between oppositely polarized portion, the minimum spacing between said magnetic flux transitions lying in the range 0.02 - 0.1 inch.
- 15. A flexible resilient magnetic particle type information card capable of correctly reading information thereon after such card has been bent back double on itself and creased at the region of the card that includes the magnetic particles, said card comprising a flexible base, a layer of uniformly distributed magnetic particles thereon, and a flexible overlayer of nonmagnetic material, said over layer having a thickness of at least 2 mils, said layer of magnetic particles being magnetically encoded, the magnetic flux transition of such encoding being at least 0.02 inch apart and said magnetic particle layer being enclosed between the base layer and over layer.
Specification