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US3846591A
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Photographically magnetic information storage element
Assignee: Individual
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Filing: 1972-08-21
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Granted: 1974-11-05
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Expires: 1992-08-21
Abstract
Abstract A visible magnetic information storage element is produced photographically by a physical development process. Information is retrieved by sensing with suitable means for detecting a magnetic image. In a preferred system an element containing a magnetic image is passed through a uniform magnetic field whereby the magnetic material becomes uniformly magnetized. The magnetic image in the form of a variable area or variable density image is then passed by a means for detecting the magnetic flux such as a magnetic recording head. A preferred information storage element comprises a photographically prepared record comprising a visual image and a visible magnetic metallic image. Photosensitive material capable of forming a physically developable image are, for example, photoconductor materials.
Inventors
- 👤 L Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:08
CPC Classifications
G; G11; G11B; G11B5/00; G03; G03C; G03C5/00; G03C5/58; G03G; G03G19/00; G11B11/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
The process of making a magnetic record photographically consisting essentially of exposing a photosensitive copy medium comprising a photoconduCtor and a binder imagewise to a pattern of activating radiation corresponding to a magnetically readable image to produce a physically developable image of catalytic nuclei and contacting this copy medium with a physical developer comprising chemically reactive, magnetizable image forming material comprising a solution of metal ions which reacts selectively to amplify the physically developable image to a visible magnetically readable image.
Claim 2
Dependent Claim
81 words
The process of making a magnetic record photographically consisting essentially of exposing a photosensitive copy medium comprising a photoconduCtor and a binder imagewise to a pattern of activating radiation corresponding to a magnetically readable image to produce a physically developable image of catalytic nuclei and contacting this copy medium with a physical developer comprising chemically reactive, magnetizable image forming material comprising a solution of metal ions which reacts selectively to amplify the physically developable image to a visible magnetically readable image.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the photosensitive copy medium comprises a flexible support having a thickness less than about 2.5 mils.
Claim 4
Dependent Claim
48 words
The process of claim 1 wherein the photosensitive copy medium comprises a support having a thickness less than about 1.5 mils coated with a photographic emulsion comprising as the photosensitive photoconductor material at least one member selected from the group consisting of silver halide and a metal oxide.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the photosensitive photoconductor material is zinc oxide.
Claim 6
Dependent Claim
113 words
The process of making a combined photographic record of a visual image and a magnetically readable image consisting essentially of exposing a photosensitive copy medium comprising a photosensitive photoconductor and a binder imagewise to a pattern of activating radiation corresponding to a visual image, exposing the photosensitive copy medium imagewise to a pattern of activating radiation corresponding to an image capable of being read-out magnetically, and contacting this copy medium with chemically reactive image forming materials comprising a solution of metal ions which react selectively to form images corresponding to the patterns of activating radiation the visual image produced being capable of visual read-out and the magnetizable image being capable of magnetic read-out.
Claim 7
Dependent Claim
113 words
The process of making a combined photographic record of a visual image and a magnetically readable image consisting essentially of exposing a photosensitive copy medium comprising a photosensitive photoconductor and a binder imagewise to a pattern of activating radiation corresponding to a visual image, exposing the photosensitive copy medium imagewise to a pattern of activating radiation corresponding to an image capable of being read-out magnetically, and contacting this copy medium with chemically reactive image forming materials comprising a solution of metal ions which react selectively to form images corresponding to the patterns of activating radiation the visual image produced being capable of visual read-out and the magnetizable image being capable of magnetic read-out.
Claim 8
Dependent Claim
48 words
The process of claim 5 wherein the photosensitive copy medium comprises a flexible support coated with a photoconductor and a gelatin or polyvinyl alcohol binder and wherein the visual image is produced by exposure and development at times different than the exposure and development of the magnetizable image.
Claim 9
Dependent Claim
30 words
The process of claim 5 wherein at least one of the images selected from the group consisting of the visual image and the magnetizable image is a continuous tone image.
Claim 10
Dependent Claim
16 words
The process of claim 5 wherein both the visual and magnetizable images are continuous tone images.
Claim 11
Dependent Claim
12 words
The process of claim 5 wherein the two exposures are conducted simultaneously.
Claim 12
Dependent Claim
41 words
The process of claim 9 wherein the copy medium comprises a flexible film support and wherein the magnetizable image comprises at least one member selected from the group consisting of a variable area magnetic image and a variable density magnetic image.
Claim 13
Dependent Claim
32 words
The process of claim 10 wherein the photosensitive copy medium comprises as the photosensitive photoconductor materials at least one member selected from the group consisting of silver halide and a metal oxide.
Claim 14
Independent Claim
89 words
A method of making a magnetic tape consisting essentially of (1) generating an electrical signal representing the wave pattern of the sound to be recorded, (2) using the signal to generate an image pattern of activating radiation, (3) exposing a photosensitive layer comprising a photoconductor and a binder to thereby generate sites which are capable of physical development, and (4) contacting the copy medium wih a physical developer containing magnetizable image forming materials comprising a solution of metal ions to produce a magnetizable image of the sound wave pattern.
Claim 15
Independent Claim
89 words
A method of making a magnetic tape consisting essentially of (1) generating an electrical signal representing the wave pattern of the sound to be recorded, (2) using the signal to generate an image pattern of activating radiation, (3) exposing a photosensitive layer comprising a photoconductor and a binder to thereby generate sites which are capable of physical development, and (4) contacting the copy medium wih a physical developer containing magnetizable image forming materials comprising a solution of metal ions to produce a magnetizable image of the sound wave pattern.
Claim 16
Independent Claim
91 words
An apparatus for making a magnetic tape consisting essentially of (1) means for generating an electrical signal representing the wave pattern of the sound to be recorded, (2) means for using the signal to generate an image pattern of activating radiation, (3) means for exposing a photosensitive layer comprising a photoconductor and a binder to thereby generate sites which are capable of physical development, and (4) means for contacting the copy medium with a physical developer containing Magnetizable image forming materials to produce a magnetizable image of the sound wave pattern.
Claim 17
Independent Claim
91 words
An apparatus for making a magnetic tape consisting essentially of (1) means for generating an electrical signal representing the wave pattern of the sound to be recorded, (2) means for using the signal to generate an image pattern of activating radiation, (3) means for exposing a photosensitive layer comprising a photoconductor and a binder to thereby generate sites which are capable of physical development, and (4) means for contacting the copy medium with a physical developer containing Magnetizable image forming materials to produce a magnetizable image of the sound wave pattern.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |