Patent US3714664A successfully refreshed from Google Patents.
US3714664A
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Magnetically encoded document
Assignee: 3M Co
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Filing: 1970-11-12
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Granted: 1973-01-30
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Expires: 1990-11-12
Abstract
Abstract A magnetically encoded document including a broad stratum containing magnetically hard material which is magnetized to represent encoded data as a plurality of disparate magnetized regions of various polarity alignments defining a fixed twodimensional pattern in the document, wherein upon at least one broad surface of the stratum each magnetized region has magnetized sections of opposite polarities having a narrow boundary therebetween, wherein the angles to which the boundaries extend breadthwise in the stratum of the document represent encoded data, with any given angle being unique to certain data. The document may be magnetically encoded by contacting the document with a pair of oppositely magnetized pole piece faces of a magnetizer key, which magnetizer key includes a tapered permanent magnet and two pole pieces disposed on opposite polarity sides of the permanent magnet, with the pole piece faces being separated by a narrow gap adjacent the narrow end of the permanent magnet.
Inventors
- 👤 R Fayling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:28
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A magnetically encoded document, comprising a broad stratum containing magnetically hard material magnetized to represent encoded data as a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, wherein upon at least one broad surface of the stratum each magnetized region comprises a pair of magnetized sections of opposite polarities having a narrow boundary therebetween, wherein the angles to which the boundaries extend breadthwise in the stratum of the document represent encoded data, with any given angle being unique to certain data.
Claim 2
Dependent Claim
90 words
A magnetically encoded document, comprising a broad stratum containing magnetically hard material magnetized to represent encoded data as a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, wherein upon at least one broad surface of the stratum each magnetized region comprises a pair of magnetized sections of opposite polarities having a narrow boundary therebetween, wherein the angles to which the boundaries extend breadthwise in the stratum of the document represent encoded data, with any given angle being unique to certain data.
Claim 3
Dependent Claim
90 words
A magnetically encoded document, comprising a broad stratum containing magnetically hard material magnetized to represent encoded data as a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, wherein upon at least one broad surface of the stratum each magnetized region comprises a pair of magnetized sections of opposite polarities having a narrow boundary therebetween, wherein the angles to which the boundaries extend breadthwise in the stratum of the document represent encoded data, with any given angle being unique to certain data.
Claim 4
Dependent Claim
90 words
A magnetically encoded document, comprising a broad stratum containing magnetically hard material magnetized to represent encoded data as a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, wherein upon at least one broad surface of the stratum each magnetized region comprises a pair of magnetized sections of opposite polarities having a narrow boundary therebetween, wherein the angles to which the boundaries extend breadthwise in the stratum of the document represent encoded data, with any given angle being unique to certain data.
Claim 5
Dependent Claim
44 words
A magnetically encoded document according to claim 1, wherein the stratum includes uniaxially anisotropic magnetically hard material oriented to have an easy axis of magnetization perpendicular to the plane of the stratum, in the direction of which axis the magnetically hard material is magnetized.
Claim 6
Dependent Claim
132 words
A magnetically encoded document according to claim 1, wherein a first magnetized region comprises a first pair of magnetized sections of opposite polarities having a first boundary therebetween extending breadthwise in the stratum at a first angle with a given orientation of polarities with respect to the first boundary to represent a first datum; and wherein a second magnetized region comprises a second pair of magnetized sections of opposite polarities having a second boundary therebetween extending breadthwise in the stratum at said first angle, but with the orientation of the second pair of magnetized section polarities with respect to the second boundary being opposite to the given orientation of the first pair of magnetized section polarities with respect to the first boundary to represent a second datum different from said first datum.
Claim 7
Dependent Claim
17 words
A magnetically encoded document according to claim 1, wherein a face of the document contains visible indicia.
Claim 8
Dependent Claim
20 words
A magnetically encoded document according to claim 1 wherein the broad stratum is a continuous stratum of magnetically hard material.
Claim 9
Dependent Claim
36 words
A magnetically encoded document according to claim 1 wherein the broad stratum containing magnetically hard material comprises uniaxially anisotropic magnetically hard barium ferrite particles in a binder or matrix of rubber, plastic, or other non-magnetic material.
Claim 10
Independent Claim
100 words
A method of magnetically encoding a document comprising a broad stratum containing magnetic material to provide a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, which method comprises the step of magnetizing the magnetic material at a plurality of locations to provide at each location a pair of magnetized sections of opposite polarities having a narrow boundary therebetween extending breadthwise in the stratum to provide magnetized regions wherein the angles to which the boundaries extend breadthwise in the stratum represent encoded data, with any given angle being unique to certain data.
Claim 11
Independent Claim
100 words
A method of magnetically encoding a document comprising a broad stratum containing magnetic material to provide a plurality of disparate magnetized regions of various polarity alignments defining a fixed two-dimensional pattern over the stratum, which method comprises the step of magnetizing the magnetic material at a plurality of locations to provide at each location a pair of magnetized sections of opposite polarities having a narrow boundary therebetween extending breadthwise in the stratum to provide magnetized regions wherein the angles to which the boundaries extend breadthwise in the stratum represent encoded data, with any given angle being unique to certain data.
Claim 12
Dependent Claim
83 words
A method of magnetically encoding a document according to claim 7, wherein the magnetizing step comprises contacting the document with a pair of oppositely magnetized pole piece faces which are separated by a narrow gap to provide a pair of magnetized sections of opposite polarities having a boundary therebetween extending breadthwise in the stratum at an angle corresponding to the angle of said narrow gap with respect to the breadth of the stratum upon the pole piece faces making contact with the document.
Claim 13
Dependent Claim
37 words
A method of magnetically encoding a document according to claim 8, wherein the contacting step further comprises placing a sheet of iron or soft steel on the opposite sides of the document from the pole piece faces.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |