US3795009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording methods, apparatus and media using deformable magnetized materials
Assignee: Bell and Howell Co
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Filing: 1970-06-17
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Granted: 1974-02-26
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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. Apparatus and media for practicing this method are also disclosed.
Inventors
- 👤 J Gaynor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:34
CPC Classifications
G; G11; G11B; G11B5/00; G03; G03G; G03G16/00; G03G19/00; G11B11/00
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
152 words
A method of recording information, comprising in combination the steps of: providing a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; applying physical deformation forces to said deformable magnetic recording medium and providing with said deformation forces in said magnetic recording medium by thermoplastic deformation deformed magnetic recording medium portions representative of said information, said physical deformation forces being applied to said deformable magnetic recording medium to reduce the thickness of the magnetic recording medium at said deformed portions to values greater than zero; and magnetizing said deformed portions of said magnetic recording medium differently from other portions of said magnetic recording medium so as to establish a magnetic record of said information by subjecting said deformed portions and said other portions to an alternating magnetic field decaying as a function of distance, said alternating magnetic field being applied independently of said application of deformation forces.
Claim 2
Independent Claim
152 words
A method of recording information, comprising in combination the steps of: providing a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; applying physical deformation forces to said deformable magnetic recording medium and providing with said deformation forces in said magnetic recording medium by thermoplastic deformation deformed magnetic recording medium portions representative of said information, said physical deformation forces being applied to said deformable magnetic recording medium to reduce the thickness of the magnetic recording medium at said deformed portions to values greater than zero; and magnetizing said deformed portions of said magnetic recording medium differently from other portions of said magnetic recording medium so as to establish a magnetic record of said information by subjecting said deformed portions and said other portions to an alternating magnetic field decaying as a function of distance, said alternating magnetic field being applied independently of said application of deformation forces.
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
53 words
A method as claimed in claim 1, wherein: said deformable magnetic recording medium is provided by combining magnetizable particles with a photovoltaic thermoplastic medium; and said deformed portions are provided by exposing said photovoltaic thermoplastic medium having said incorporated magnetizable particles to an image of said information and softening said photovoltaic thermoplastic medium.
Claim 5
Dependent Claim
32 words
A method as claimed in claim 1, including the steps of: providing a further magnetic recording medium; and establishing on said further magnetic recording medium a magnetic copy of said magnetic record.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 4, including the step of: printing out said magnetic copy of said magnetic record from said further magnetic recording medium with the assistance of magnetically attracted toner.
Claim 7
Independent Claim
141 words
A method of recording information, comprising in combination the steps of: providing a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; applying physical deformation forces to said deformable magnetic recording medium and providing with said deformation forces in said magnetic recording medium by thermoplastic deformation depressions representative of said information, said physical deformation forces being applied to said deformable magnetic recording medium to reduce the thickness of the magnetic recording medium at said deformed portions to values greater than zero whereby said information-representative depressions are located above portions of said magnetic recording medium; and establishing a magnetic record of said information by magnetizing regions of said magnetic recording medium between said depressions stronger than portions of said magnetic recording medium below said depressions, said magnetic record being established independently of said application of deformation forces.
Claim 8
Independent Claim
141 words
A method of recording information, comprising in combination the steps of: providing a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; applying physical deformation forces to said deformable magnetic recording medium and providing with said deformation forces in said magnetic recording medium by thermoplastic deformation depressions representative of said information, said physical deformation forces being applied to said deformable magnetic recording medium to reduce the thickness of the magnetic recording medium at said deformed portions to values greater than zero whereby said information-representative depressions are located above portions of said magnetic recording medium; and establishing a magnetic record of said information by magnetizing regions of said magnetic recording medium between said depressions stronger than portions of said magnetic recording medium below said depressions, said magnetic record being established independently of said application of deformation forces.
Claim 9
Dependent Claim
55 words
A method as claimed in claim 6, wherein: said deformable magnetic recording medium is electrically chargeable; and said provision of said depressions includes the steps of establishing on said magnetic recording medium a pattern of electric charges representative of said information, and enabling said electric charges to depress selectively portions of said magnetic recording medium.
Claim 10
Dependent Claim
64 words
A method as claimed in claim 6, wherein: said deformable magnetic recording medium is electrically chargeable and thermoplastically deformable; and said provision of said depressions includes the steps of establishing on said magnetic recording medium a pattern of electric charges representative of said information, and heating said magnetic recording medium to enable said electric charges to depress selectively portions of said magnetic recording medium.
Claim 11
Dependent Claim
49 words
A method as claimed in claim 6, wherein: said magnetic recording medium is selectively softenable; and said depressions are formed by softening portions of said magnetic recording medium representative of said information and by subjecting said magnetic recording medium to magnetic fields so as to depress said softened portions.
Claim 12
Dependent Claim
76 words
A method as claimed in claim 6, wherein: said magnetic recording medium is electrically chargeable and thermoplastically deformable; and said provision of said depressions includes the steps of electrically charging said magnetic recording medium, establishing a pattern of heat gradients representative of said information, and exposing said electrically charged magnetic recording medium to said pattern of heat gradients to enable electric charges on said magnetic recording medium to depress selectively portions of said magnetic recording medium.
Claim 13
Dependent Claim
145 words
A method as claimed in claim 6, wherein: said deformable magnetic recording medium is electrically chargeable and thermoplastically deformable; said provisions of said depressions includes the steps of electrically charging said magnetic recording medium, establishing a patterN of heat gradients representative of said information, exposing said electrically charged magnetic recording medium to said pattern of heat gradients to enable electric charges on said magnetic recording medium to depress selectively portions of said magnetic recording medium, and cooling said magnetic recording medium to fix said depressions in said magnetic recording medium; and said establishment of said magnetic record includes the step of subjecting said magnetic recording medium to an alternating magnetic field decaying in a direction toward portions of said magnetic recording medium below said depressions, so that portions of said magnetic recording medium between said depressions are stronger magnetized than said portions below said depressions.
Claim 14
Dependent Claim
30 words
A method as claimed in claim 6, wherein: said depressions are formed in said magnetic recording medium with the aid of a pattern of magnetic gradients representative of said information.
Claim 15
Dependent Claim
44 words
A method as claimed in claim 6, wherein: said deformable magnetic recording medium is provided by combining magnetizable particles with a photovoltaic thermoplastic medium; and said depressions are provided with the assistance of electric charges set up by photovoltaic action of said thermoplastic medium.
Claim 16
Dependent Claim
44 words
A method as claimed in claim 6, wherein: said magnetic record is established by subjecting said magnetic recording medium after provision of said depressions to an alternating magnetic field decaying in a direction toward said portions of said magnetic recording medium below said depressions.
Claim 17
Dependent Claim
23 words
A method as claimed in claim 14, including the step of: printing out said magnetic record with the assistance of magnetically attracted toner.
Claim 18
Dependent Claim
32 words
A method as claimed in claim 14, including the steps of: providing a further magnetic recording medium; and establishing on said further magnetic recording medium a magnetic copy of said magnetic record.
Claim 19
Dependent Claim
33 words
A method as claimed in claim 16, including the step of: printing out said magnetic copy of said magnetic record from said further magnetic recording medium with the assistance of magnetically attracted toner.
Claim 20
Independent Claim
95 words
A method of recording an image, comprising in combination the steps of: providing a deformable, electrically chargeable and photoconductive magnetic recording medium; exposing said magnetic recording medium to electric charges and to said image to provide on said magnetic recording medium a pattern of electric charges corresponding to said image; enabling said electric charges to deform portions of said magnetic recording medium corresponding in distribution to said pattern of electric charges; and magnetizing said deformed portions differently from other portions of said magnetic recording medium so as to establish a magnetic record of said image.
Claim 21
Independent Claim
95 words
A method of recording an image, comprising in combination the steps of: providing a deformable, electrically chargeable and photoconductive magnetic recording medium; exposing said magnetic recording medium to electric charges and to said image to provide on said magnetic recording medium a pattern of electric charges corresponding to said image; enabling said electric charges to deform portions of said magnetic recording medium corresponding in distribution to said pattern of electric charges; and magnetizing said deformed portions differently from other portions of said magnetic recording medium so as to establish a magnetic record of said image.
Claim 22
Dependent Claim
55 words
A method as claimed in claim 18, wherein: said magnetic recording medium is cooled prior to the establishment of said magnetic record to fix said deformed portions in said magnetic recording medium; and said magnetic record is established by subjecting said magnetic recording medium to an alternating magnetic field decaying as a function of distance.
Claim 23
Dependent Claim
22 words
A method as claimed in claim 18, wherein: said magnetic recording medium is provided by dispersing ferromagnetic particles in a thermoplastic photoconductor.
Claim 24
Dependent Claim
24 words
A method as claimed in claim 18, wherein: said magnetic recording medium is composed of a thermoplastic photoconductive sheet having ferromagnetic particles incorporated therein.
Claim 25
Dependent Claim
23 words
A method as claimed in claim 18, including the step of: printing out said magnetic record with the assistance of magnetically attracted toner.
Claim 26
Dependent Claim
40 words
A method as claimed in claim 18, wherein: said magnetic recording medium is provided by incorporating ferromagnetic particles capable of retaining a magnetic moment upon magnetization thereof in a thermoplastic sheet, and combining a sheet-like photoconductor with said thermoPlastic sheet.
Claim 27
Dependent Claim
40 words
A method as claimed in claim 23, wherein: said thermoplastic sheet is selectively removable from said sheet-like photoconductor; and said pattern of electric charges is provided by a charge transfer process operating on said photoconductor and on said thermoplastic sheet.
Claim 28
Dependent Claim
32 words
A method as claimed in claim 18, including the steps of: providing a further magnetic recording medium; and establishing on said further magnetic recording medium a magnetic copy of said magnetic record.
Claim 29
Dependent Claim
33 words
A method as claimed in claim 25, including the step of: printing out said magnetic copy of said magnetic record from said further magnetic recording medium with the assistance of magnetically attracted toner.
Claim 30
Dependent Claim
130 words
Apparatus for recording information, comprising in combination: a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; means for providing physical deformation forces for deforming portions of said magnetic recording medium and means for providing in said magnetic recording medium with said deformation forces by thermoplastic deformation deformed portions representative of said information; and means for magnetizing said deformed portions of said magnetic recording medium differently from other portions of said magnetic recording medium so as to establish a magnetic record of said information, said magnetizing means include means distinct from said deformation force providing means for generating an alternating magnetic field decaying as a function of distance, and means for applying said alternating magnetic field to said magnetic recording medium having said deformed portions.
Claim 31
Dependent Claim
130 words
Apparatus for recording information, comprising in combination: a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; means for providing physical deformation forces for deforming portions of said magnetic recording medium and means for providing in said magnetic recording medium with said deformation forces by thermoplastic deformation deformed portions representative of said information; and means for magnetizing said deformed portions of said magnetic recording medium differently from other portions of said magnetic recording medium so as to establish a magnetic record of said information, said magnetizing means include means distinct from said deformation force providing means for generating an alternating magnetic field decaying as a function of distance, and means for applying said alternating magnetic field to said magnetic recording medium having said deformed portions.
Claim 32
Dependent Claim
21 words
Apparatus as claimed in claim 27, including: means for printing out said magnetic record with the assistance of magnetically attracted toner.
Claim 33
Dependent Claim
51 words
Apparatus as claimed in claim 27, wherein: said deformable magnetic recording medium comprises a photovoltaic thermoplastic medium and magnetizable particles; and said means for providing said deformed portions include means for providing an image of said information, exposing said photovoltaic thermoplastic medium to said image, and softening said photovoltaic thermoplastic medium.
Claim 34
Dependent Claim
37 words
Apparatus as claimed in claim 27, including: a further magnetic recording medium; and means operatively associated with said further magnetic recording medium for establishing on said further magnetic recording medium a magnetic copy of said magnetic record.
Claim 35
Dependent Claim
33 words
Apparatus as claimed in claim 30, including: means operatively associated with said further magnetic recording medium for printing out said magnetic copy of said magnetic record with the assistance of magnetically attracted toner.
Claim 36
Dependent Claim
95 words
Apparatus for recording information, comprising in combination: a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; means for providing physical deformation forces for deforming portions of said magnetic recording medium and means for providing in said magnetic recording medium with said deformation forces by thermoplastic deformation depressions representative of said information; and means distinct from said deformation providing means for establishing a magnetic record of said information by magnetizing portions of said magnetic recording medium between said depressions stronger than portions of said magnetic recording medium below said depressions.
Claim 37
Dependent Claim
95 words
Apparatus for recording information, comprising in combination: a thermoplastically deformable magnetic recording medium capable of retaining a magnetic moment upon magnetization thereof; means for providing physical deformation forces for deforming portions of said magnetic recording medium and means for providing in said magnetic recording medium with said deformation forces by thermoplastic deformation depressions representative of said information; and means distinct from said deformation providing means for establishing a magnetic record of said information by magnetizing portions of said magnetic recording medium between said depressions stronger than portions of said magnetic recording medium below said depressions.
Claim 38
Dependent Claim
37 words
Apparatus as claimed in claim 32, including: a further magnetic recording medium; and means operatively associated with said further magnetic recording medium for establishing on said further magnetic recording medium a magnetic copy of said magnetic record.
Claim 39
Dependent Claim
41 words
Apparatus as claimed in claim 32, wherein: said means for providing said depressions include means for providing a pattern of magnetic gradients representative of said information and means for providing saiD depressions with the aid of said pattern of magnetic gradients.
Claim 40
Dependent Claim
55 words
Apparatus as claimed in claim 32, wherein: said magnetic recording medium is electrically chargeable; and said means for providing said depressions include means for establishing on said magnetic recording medium a pattern of electric charges representative of said information, and means for enabling said electric charges to depress selectively portions of said magnetic recording medium.
Claim 41
Dependent Claim
45 words
Apparatus as claimed in claim 32, wherein: said magnetic recording medium is selectively softenable; and said means for providing said depressions include means for softening portions of said magnetic recording medium representative of said information, and means for providing magnetic fields contracting said softened portions.
Claim 42
Dependent Claim
59 words
Apparatus as claimed in claim 32, wherein: said deformable magnetic recording medium comprises a photovoltaic thermoplastic medium and magnetizable particles; and said means for providing said depressions include means for causing electric charge patterns corresponding to said information to be set up in said thermoplastic medium and for causing said depressions with the aid of said electric charge patterns.
Claim 43
Dependent Claim
48 words
Apparatus as claimed in claim 32, wherein: said means for establishing a magnetic record of said information include means for generating, and for subjecting said magnetic recording medium to, an alternating magnetic field decaying in a direction toward said portions of said magnetic recording medium below said depressions.
Claim 44
Dependent Claim
21 words
Apparatus as claimed in claim 38, including: means for printing out said magnetic record with the assistance of magnetically attracted toner.
Claim 45
Dependent Claim
105 words
Apparatus as claimed in claim 38, wherein: said magnetic recording medium is electrically chargeable and thermoplastically deformable; and said means for providing said depressions include means for electrically charging said magnetic recording medium, means for establishing a pattern of heat gradients representative of said information and for exposing said electrically charged magnetic recording medium to said pattern of heat gradients to enable electric charges on said magnetic recording medium to depress selectively portions of said magnetic recording medium, and means for cooling said magnetic recording medium to fix said depressed portions in said magnetic recording medium prior to said subjection to said alternating magnetic field.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |