US4133933A
Expired / Lapsed
US
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Electrosensitive recording sheet with support containing cuprous iodide particles
Assignee: Panasonic Holdings Corp
•
Filing: 1976-06-22
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Granted: 1979-01-09
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Expires: 1996-06-22
Abstract
Abstract An electrosensitive recording sheet consists of an electroconductive material of cuprous iodide, an electrosensitive color forming material, a binder and a support. A color forms in the recording sheet in response to an electric signal when an electric current flows therein. The cuprous iodide is whitened by adding an alkaline substance thereto, so as to only slightly increase the resistance of the cuprous iodide and to increase the contrast of recorded mark and the ordinary appearance of the recording sheet.
Inventors
- 👤 Yoichi Sekine
- 👤 Wataru Shimotsuma
- 👤 Shigeru Tsubusaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:05
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/25; Y10T428/256; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
52 words
An electrosensitive recording sheet having, on a support of paper or plastic film, an electroconductive layer which contains cuprous iodide particles having an excess amount of iodine, wherein the cuprous iodide particles have been whitened by removing iodine existing on the surface of the cuprous iodide particles using an aqueous alkaline material.
Claim 2
Dependent Claim
52 words
An electrosensitive recording sheet having, on a support of paper or plastic film, an electroconductive layer which contains cuprous iodide particles having an excess amount of iodine, wherein the cuprous iodide particles have been whitened by removing iodine existing on the surface of the cuprous iodide particles using an aqueous alkaline material.
Claim 3
Dependent Claim
53 words
An electrosensitive recording sheet having, on a support of paper or plastic film, an electroconductive recording layer which contains cuprous iodide particles having an excess amount of iodine, wherein the cuprous iodide particles have been whitened by removing iodine existing on the surface of the cuprous iodide particles using an aqueous alkaline material.
Claim 4
Dependent Claim
53 words
An electrosensitive recording sheet having, on a support of paper or plastic film, an electroconductive recording layer which contains cuprous iodide particles having an excess amount of iodine, wherein the cuprous iodide particles have been whitened by removing iodine existing on the surface of the cuprous iodide particles using an aqueous alkaline material.
Claim 5
Dependent Claim
19 words
An electrosensitive recording sheet according to claim 2, the support comprises an insulating sheet and an electroconductive layer thereon.
Claim 6
Dependent Claim
18 words
An electrosensitive recording sheet according to claim 3, wherein the electroconductive layer comprises cuprous iodide and a binder.
Claim 7
Dependent Claim
17 words
An electrosensitive recording sheet according to claim 4, wherein cuprous iodide is whitened with an alkaline material.
Claim 8
Dependent Claim
25 words
An electrosensitive recording sheet according to claim 1, wherein the alkaline material is a carbonate of an alkali metal, an alkaline earth metal or ammonia.
Claim 9
Dependent Claim
25 words
An electrosensitive recording sheet according to claim 1, wherein the alkaline material is an acetate of an alkali metal, an alkaline earth metal or ammonia.
Claim 10
Dependent Claim
24 words
An electrosensitive recording sheet according to claim 1, wherein the alkaline material is an alkali metal salt or ammonium salt of a carboxylic acid.
Claim 11
Dependent Claim
20 words
An electrosensitive recording sheet according to claim 1, wherein the alkaline material is an alkali metal salt of silicic acid.
Claim 12
Dependent Claim
20 words
An electrosensitive recording sheet according to claim 1, wherein the alkaline material is a hydroxide of ammonia or a metal.
Claim 13
Dependent Claim
20 words
An electrosensitive recording sheet according to claim 2, wherein the color forming material is a heat sensitive color forming material.
Claim 14
Dependent Claim
17 words
An electrosensitive recording sheet according to claim 2, wherein the color forming material is a metal oxide.
Claim 15
Dependent Claim
35 words
An electrosensitive recording sheet according to claim 11, wherein the heat sensitive color forming material is a combination of a leuco base of triphenylmethane or fluoran dye and a phenolic material or an organic acid.
Claim 16
Dependent Claim
25 words
An electrosensitive recording sheet according to claim 5, wherein the alkaline material is a carbonate of an alkali metal, an alkaline earth metal or ammonia.
Claim 17
Independent Claim
39 words
A method for whitening cuprous iodide particles having an excess amount of iodine which comprises adding an alkaline material to an aqueous dispersion of cuprous iodide particles to remove iodine existing on the surface of the cuprous iodide particles.
Claim 18
Independent Claim
39 words
A method for whitening cuprous iodide particles having an excess amount of iodine which comprises adding an alkaline material to an aqueous dispersion of cuprous iodide particles to remove iodine existing on the surface of the cuprous iodide particles.
Claim 19
Dependent Claim
27 words
A method for whitening cuprous iodide according to claim 15, wherein the alkaline material is a carbonate of an alkali metal, an alkaline earth metal or ammonia.
Claim 20
Dependent Claim
27 words
A method for whitening cuprous iodide according to claim 15, wherein the alkaline material is an acetate of an alkali metal, an alkaline earth metal or ammonia.
Claim 21
Dependent Claim
26 words
A method for whitening cuprous iodide according to claim 15, wherein the alkaline material is an alkali metal salt or ammonium salt of a carboxylic acid.
Claim 22
Dependent Claim
22 words
A method for whitening cuprous iodide according to claim 15, wherein the alkaline material is an alkali metal salt of silicic acid.
Claim 23
Dependent Claim
22 words
A method for whitening cuprous iodide according to claim 15, wherein the alkaline material is a hydroxide of ammonia or a metal.
Claim 24
Dependent Claim
35 words
A method for whitening cuprous iodide according to claim 15, wherein the amount of the alkaline material added is 0.1-5 mols in terms of the amount of hydroxyl ion per 100 mols of cuprous iodide.
Claim 25
Dependent Claim
25 words
An electrosensitive recording sheet according to claim 2, wherein the alkaline material is a carbonate of an alkali metal, an alkaline earth metal or ammonia.
Claim 26
Dependent Claim
25 words
An electrosensitive recording sheet according to claim 2, wherein the alkaline material is an acetate of an alkali metal, an alkaline earth metal or ammonia.
Claim 27
Dependent Claim
24 words
An electrosensitive recording sheet according to claim 2, wherein the alkaline material is an alkali metal salt or ammonium salt of a carboxylic acid.
Claim 28
Dependent Claim
20 words
An electrosensitive recording sheet according to claim 2, wherein the alkaline material is an alkali metal salt of silicic acid.
Claim 29
Dependent Claim
20 words
An electrosensitive recording sheet according to claim 2, wherein the alkaline material is a hydroxide of ammonia or a metal.
Claim 30
Independent Claim
36 words
A method of whitening an electrosensitive recording sheet containing cuprous iodide particles having an excess amount of iodine, by removing iodine existing on the surface of the cuprous iodide particles by applying an alkaline material thereto.
Claim 31
Independent Claim
36 words
A method of whitening an electrosensitive recording sheet containing cuprous iodide particles having an excess amount of iodine, by removing iodine existing on the surface of the cuprous iodide particles by applying an alkaline material thereto.
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |