US3683405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic deformation recording
Assignee: Bell and Howell Co
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Filing: 1970-06-17
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Granted: 1972-08-08
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Expires: 1990-06-17
Abstract
Abstract A method of recording information provides, in a deformable magnetic recording medium, deformed portions representative of the information, and magnetizes these deformed portions differently from other portions of the magnetic recording medium so as to establish a magnetic record of the information.
Inventors
- 👤 Sherman W Duck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; G; G03; G03G; G03G19/00; G11; G11B; G11B11/00; G11B23/00; G11B23/0057; G11B5/00; G11B5/02; G11B5/86; G11B5/865
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A methOd of recording information, comprising in combination the steps of: providing a deformable magnetic recording medium including a material retaining a magnetic moment upon magnetization thereof; providing in said magnetic recording medium deformed portions representative of said information; providing a pattern of magnetic gradients; and magnetically copying said magnetic gradient pattern into said magnetic recording medium so that said deformed portions are magnetized differently from other portions of said magnetic recording medium whereby a magnetic record of said information is established.
Claim 2
Independent Claim
82 words
A methOd of recording information, comprising in combination the steps of: providing a deformable magnetic recording medium including a material retaining a magnetic moment upon magnetization thereof; providing in said magnetic recording medium deformed portions representative of said information; providing a pattern of magnetic gradients; and magnetically copying said magnetic gradient pattern into said magnetic recording medium so that said deformed portions are magnetized differently from other portions of said magnetic recording medium whereby a magnetic record of said information is established.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1, including the step of: printing out said magnetic record with the assistance of magnetically attracted toner.
Claim 4
Dependent Claim
52 words
A method as claimed in claim 1, wherein: said magnetic gradient pattern is copied into said recording medium by subjecting said recording medium to both said magnetic gradient pattern and to an anhysteretic magnetic transfer field so that said deformed portions are magnetized differently from other portions of said magnetic recording medium.
Claim 5
Dependent Claim
82 words
A method as claimed in claim 1, wherein: said pattern of magnetic gradients is provided on a magnetizable layer; said magnetizable layer is located in proximity of said deformed recording medium so that said magnetizable layer is more proximate to said other portions of the recording medium than to bottom regions of said deformed portions; and said deformed magnetic recording medium is subjected to an anhysteretic magnetic transfer field so that said magnetic gradient pattern is copied into said magnetic recording medium.
Claim 6
Dependent Claim
20 words
A method as claimed in claim 1, wherein: said information-representative deformed portions are provided with the aid of electrostatic forces.
Claim 7
Dependent Claim
20 words
A method as claimed in claim 1, wherein: said information-representative deformed portions are provided with the aid of magnetic forces.
Claim 8
Independent Claim
68 words
A method of recording information, comprising in combination the steps of: providing a deformable magnetic recording medium including a material retaining a magnetic moment upon magnetization thereof; magnetizing said deformable magnetic recording medium by recording a line pattern of magnetic gradients on said magnetic recording medium; and providing in said magnetized recording medium deformed portions representative of said information whereby a magnetic record of said information is established.
Claim 9
Independent Claim
68 words
A method of recording information, comprising in combination the steps of: providing a deformable magnetic recording medium including a material retaining a magnetic moment upon magnetization thereof; magnetizing said deformable magnetic recording medium by recording a line pattern of magnetic gradients on said magnetic recording medium; and providing in said magnetized recording medium deformed portions representative of said information whereby a magnetic record of said information is established.
Claim 10
Dependent Claim
74 words
A method as claimed in claim 7, including the steps of providing a magnetizable layer; locating said magnetizable layer into proximity of said deformed, magnetized recording medium so that said magnetizable layer is spaced from said deformed portions differently than from other portions of said deformed, magnetized recording medium; and subjecting said magnetizable layer to an anhysteretic magnetic transfer field so as to copy said magnetic record of said information onto said magnetizable layer.
Claim 11
Dependent Claim
20 words
A method as claimed in claim 7, wherein: said information-representative deformed portions are provided with the aid of electrostatic forces.
Claim 12
Dependent Claim
22 words
A method as claimed in claim 7, wherein: said information-representative deformed portions are provided with the aid of said recorded magnetic gradients.
Claim 13
Dependent Claim
22 words
A method as claimed in claim 7, including the step of magnetically copying said magnetic record onto a further magnetic recording medium.
Claim 14
Dependent Claim
29 words
A method as claimed in claim 11, including the step of: printing out said magnetic record from said further magnetic recording medium with the assistance of magnetically attracted toner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |