US3947879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color recording medium responsive to force fields and apparatus for recording on the medium
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1974-12-04
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Granted: 1976-03-30
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Expires: 1994-12-04
Abstract
Abstract A multi-color recording medium responsive to a magnetic or an electrostatic recording field for recording an input signal thereon and having a continuous web of a transparent encapsulating material containing a suspension of highly reflective flakes with these flakes being selectively orientable between two incident light reflecting states. These flakes are distributed in individual micro-capsules with each capsule having a predetermined response to an applied force field to allow orientation of the suspended particles therein from one light reflecting state to another.
Inventors
- 👤 Norman L. Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:05
CPC Classifications
G; G11; G11B; G11B11/00; G11B11/10; G03; G03G; G03G17/00; G03G19/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
226 words
A recording medium responsive to a force field comprising: a continuous web member, said continuous web member being formed from a transparent material having a first plurality of capsules therein and a second plurality of capsules therein, said first and second plurality of capsules being substantially uniformly mixed throughout said transparent material, first force field responsive means responsive to a first force field in said first plurality of capsules, said first responsive means exhibiting a first response to incident electromagnetic radiation, second force field responsive means responsive to a second force field in said second plurality of capsules, said second responsive means exhibiting a second response different from said response of said first responsive means to incident electromagnetic radiation, said first and said second force field responsive means each including highly reflective, and flake-like particles suspended within said capsules and being selectively orientable by an applied force field from a first position wherein flake-like particles scatter incident electromagnetic energy into said continuous web member into a second position wherein said flake-like particles reflect incident wave lengths of electromagnetic energy from said continuous web member thus forming a contrast between areas of said continuous web member having particles in said first orientation from areas of said continuous web member having particles in said second orientation in accordance with said first and second response to incident electromagnetic energy.
Claim 2
Dependent Claim
226 words
A recording medium responsive to a force field comprising: a continuous web member, said continuous web member being formed from a transparent material having a first plurality of capsules therein and a second plurality of capsules therein, said first and second plurality of capsules being substantially uniformly mixed throughout said transparent material, first force field responsive means responsive to a first force field in said first plurality of capsules, said first responsive means exhibiting a first response to incident electromagnetic radiation, second force field responsive means responsive to a second force field in said second plurality of capsules, said second responsive means exhibiting a second response different from said response of said first responsive means to incident electromagnetic radiation, said first and said second force field responsive means each including highly reflective, and flake-like particles suspended within said capsules and being selectively orientable by an applied force field from a first position wherein flake-like particles scatter incident electromagnetic energy into said continuous web member into a second position wherein said flake-like particles reflect incident wave lengths of electromagnetic energy from said continuous web member thus forming a contrast between areas of said continuous web member having particles in said first orientation from areas of said continuous web member having particles in said second orientation in accordance with said first and second response to incident electromagnetic energy.
Claim 3
Dependent Claim
50 words
A recording medium as set forth in claim 1 wherein said first force field responsive means includes a suspension medium for said particles having a first viscosity and said second force field responsive means includes a suspension medium for said particles having a second viscosity different from said first viscosity.
Claim 4
Dependent Claim
27 words
A recording medium as set forth in claim 2 wherein said first and second response of said particles within said first and second capsules are respective colors.
Claim 5
Dependent Claim
48 words
A recording medium as set forth in claim 1 wherein said particles in said first force responsive means have a first force field response characteristic and said particles in said second force field responsive means have a second force field response characteristic different from said first response characteristic.
Claim 6
Dependent Claim
31 words
A recording medium as set forth in claim 1 wherein said first and second response characteristics of said particles within said first and second capsules are respective first and second colors.
Claim 7
Dependent Claim
127 words
A recorder for recording on a web member having a first and a second force field responsive means therein and including highly reflective and flake-like particles suspended within said web member in said first and second means, said first and second means responding to first and second force fields respectively to produce a reorientation of said particles from a first position to a second position and said particles within said first means having a response characteristic to incident electromagnetic energy different from a response characteristic of particles in said second means comprising means for generating said first force field in said first and second means, means for generating said second force field in said first and second means, and means for selectively energizing said last two-mentioned means.
Claim 8
Dependent Claim
127 words
A recorder for recording on a web member having a first and a second force field responsive means therein and including highly reflective and flake-like particles suspended within said web member in said first and second means, said first and second means responding to first and second force fields respectively to produce a reorientation of said particles from a first position to a second position and said particles within said first means having a response characteristic to incident electromagnetic energy different from a response characteristic of particles in said second means comprising means for generating said first force field in said first and second means, means for generating said second force field in said first and second means, and means for selectively energizing said last two-mentioned means.
Claim 9
Dependent Claim
23 words
A recorder as set forth in claim 6 wherein said first force field has a field strength different from said second force field.
Claim 10
Dependent Claim
22 words
A recorder as set forth in claim 6 wherein said first force field has a longer duration than said first force field.
Claim 11
Dependent Claim
19 words
A recorder as set forth in claim 6 wherein said first and said second force fields are magnetic fields.
Claim 12
Dependent Claim
26 words
A recorder as set forth in claim 6 wherein said first and second response of said particles within said first and second means are respective colors.
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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |