US4335173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for reducing undesirable effects of dirt particles on a flexible record device
Assignee: Eastman Kodak Co
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Filing: 1980-09-22
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Granted: 1982-06-15
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Expires: 2000-09-22
Abstract
Abstract Methods and means for reducing undesirable effects of dirt particles on a flexible record device are disclosed. These undesirable effects are alleviated in accordance with the present invention by using a multilayer cushioning device to absorb the effect of dirt particles. The multilayer cushioning device comprises an amorphous cushioning layer, a flexible encompassing layer and, optionally, a flexible protective layer. The cushioning device can be superposed on the backside of the flexible record device itself, on a rigid platen of a recording or reading apparatus, or on a separate insert to be placed between the record device and the platen.
Inventors
- 👤 Angel Caraballo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:48
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B17/00; G11B17/32; G11B23/00; G11B23/50; G11B23/505; G11B7/241; G11B7/252; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928; Y10T428/31931; Y10T428/31935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
In a flexible record device comprising a flexible support layer having a recording layer on one side thereof, the improvement wherein said flexible record device has superposed on the opposite side of said recording layer a cushioning layer having an average thickness of from about 0.17 millimeter to about 0.64 millimeter completely enveloped either by a flexible encompassing layer or by a flexible encompassing layer and said flexible support layer; said cushioning layer comprising an amorphous film-forming material and said flexible encompassing layer being immiscible with and inhibiting diffusion therethrough of said amorphous film-forming material.
Claim 2
Dependent Claim
95 words
In a flexible record device comprising a flexible support layer having a recording layer on one side thereof, the improvement wherein said flexible record device has superposed on the opposite side of said recording layer a cushioning layer having an average thickness of from about 0.17 millimeter to about 0.64 millimeter completely enveloped either by a flexible encompassing layer or by a flexible encompassing layer and said flexible support layer; said cushioning layer comprising an amorphous film-forming material and said flexible encompassing layer being immiscible with and inhibiting diffusion therethrough of said amorphous film-forming material.
Claim 3
Dependent Claim
63 words
The flexible record device of claim 1 wherein said amorphous film-forming material comprises a solution of from 5 percent to 25 percent by weight of a first polymer and from 95 percent to 75 percent by weight of a solvent for said first polymer, and said flexible encompassing layer comprises a second polymer which is insoluble in said solvent for said first polymer.
Claim 4
Dependent Claim
27 words
The flexible record device of claim 2 wherein said first polymer is a water-soluble polymer, said solvent is water and said second polymer is a water-insoluble polymer.
Claim 5
Dependent Claim
42 words
The flexible record device of claim 3 wherein said water-soluble first polymer is selected from: (a) poly(acrylamide); (b) poly(acrylamide-co-2-acetoacetoxyethyl methacrylate) (weight ratio 90/10); and (c) poly(2-acrylamido-2-methylpropanesulfonic acid); and said water-insoluble second polymer is selected from: (d) cyclized polyisoprene; and (e) poly(methyl methacrylate).
Claim 6
Dependent Claim
38 words
The flexible record device of claim 1 wherein said amorphous film-forming material comprises a solution of 10 percent by weight of poly(2-acrylamido-2-methylpropanesulfonic acid) and 90 percent by weight of water, and said flexible encompassing layer comprises cyclized polyisoprene.
Claim 7
Dependent Claim
53 words
The flexible record device of claim 2 wherein said first polymer is a water-insoluble polymer, said solvent is an organic solvent, said second polymer is a water-soluble polymer and said flexible record device comprises, superposed on said flexible encompassing layer, a flexible protective layer which is water-insoluble and inhibits diffusion of water therethrough.
Claim 8
Dependent Claim
18 words
The flexible record device of claim 1 wherein said flexible support layer is a reflective flexible support layer.
Claim 9
Dependent Claim
22 words
The flexible record device of claim 7 wherein said reflective support layer comprises a layer of poly(ethylene terephthalate) having aluminum superposed thereon.
Claim 10
Dependent Claim
17 words
The flexible record device of claim 1 wherein said recording layer comprises a dye and a binder.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |