Patent US5396072A successfully refreshed from Google Patents.
Patent EP0439161A2 successfully refreshed from Google Patents.
EP0439161A2
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Electrographic recording element with reduced humidity sensitivity
Assignee: EIDP Inc
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Filing: 1991-01-24
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Granted: —
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Expires: 2011-01-24
Abstract
Abstract Electrographic recording element with reduced humidity sensitivity comprising (1) a base, e.g., paper, polymer film, (2) a conductive layer of a continuous coating of an electroconductive composition comprising (a) polymeric binder, (b) electroconductive powder comprising amorphous silica or a silica-containing material in association with a two-dimensional network of antimony-containing tin oxide crystallites in which the antimony content ranges from 1 to about 30% by weight of tin oxide; and (3) a dielectric layer. Mixtures of two or more different sized electroconductive powder particles can be used. The electrographic recording element is useful for recording high-speed computer output, e.g., in geophysical mapping, weather map printing, architectural and engineering drawings, etc.
Inventors
- 👤 Ray A. Work Iii
- 👤 Clifford Edward Milner
- 👤 Sarah Jane Kintner
- 👤 James Edward Genthe
- 👤 Stephen Strella
- 👤 Charles Rocco Iacovella
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:26
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911; Y10T428/2982; Y10T428/2989; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
82 words
An electrographic recording element with reduced sensitivity to humidity, comprising, in order: (1) a base, (2) a conductive layer comprising a continuous coating of an electroconductive composition, said electroconductive composition comprising: (a) a polymeric binder and (b) an electroconductive powder, said electroconductive powder comprising amorphous silica or a silica-containing material in association with a two-dimensional network of antimony-containing tin oxide crystallites in which the antimony content ranges from 1 to about 30% by weight of tin oxide; and (3) a dielectric layer.
Claim 2
Dependent Claim
10 words
The element of claim 1 wherein said base is paper.
Claim 3
Dependent Claim
12 words
The element of claim 1 wherein said base is a polymer film.
Claim 4
Dependent Claim
25 words
The element of claim 1 wherein the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.5 to about 1.5.
Claim 5
Dependent Claim
20 words
The element of claim 4 wherein said conductive layer has a coating weight of about 1 to about 20 mg/m².
Claim 6
Dependent Claim
21 words
The element of claim 1 wherein said electroconductive power is a mixture of two or more different sized electroconductive powder particles.
Claim 7
Dependent Claim
31 words
The element of claim 1 wherein said electroconductive powder comprises shaped particles of amorphous silica, or a silica-containing material, which are surface-coated with said two-dimensional network of antimony-containing tin oxide crystallites.
Claim 8
Dependent Claim
25 words
The element of claim 7 wherein the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.5 to about 1.5.
Claim 9
Dependent Claim
13 words
The element of claim 7 wherein said particles comprise an inert core material.
Claim 10
Dependent Claim
11 words
The element of claim 7 wherein said particles are hollow shells.
Claim 11
Dependent Claim
12 words
The element of claim 7 wherein said base is a polymer film.
Claim 12
Dependent Claim
21 words
The element of claim 7 wherein said electroconductive power is a mixture of two or more different sized electroconductive powder particles.
Claim 13
Dependent Claim
13 words
The element of claim 11 wherein said polymeric binder is a cross-linked polymer.
Claim 14
Dependent Claim
13 words
The element of claim 11 wherein said dielectric layer is a cross-linked polymer.
Claim 15
Dependent Claim
18 words
The element of claim 11 wherein both said dielectric layer and said conductive layer are coated from water.
Claim 16
Dependent Claim
17 words
The element of claim 11 additionally comprising a grounding stripe on the edge of the dielectric layer.
Claim 17
Dependent Claim
12 words
The element of claim 11 wherein said base is polyethylene terephthalate film.
Claim 18
Dependent Claim
21 words
The element of claim 11 wherein said electroconductive power is a mixture of two or more different sized electroconductive powder particles.
Claim 19
Dependent Claim
14 words
The element of claim 17 wherein said electroconductive powder comprises mica core powder particles.
Claim 20
Dependent Claim
25 words
The element of claim 17 wherein the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.6 to about 1.3.
Claim 21
Dependent Claim
13 words
The element of claim 17 wherein said polymeric binder is a cross-linked polymer.
Claim 22
Dependent Claim
13 words
The element of claim 17 wherein said dielectric layer is a cross-linked polymer.
Claim 23
Dependent Claim
20 words
The element of claim 17 wherein said conductive layer has a coating weight of about 1 to about 8 gm/m².
Claim 24
Dependent Claim
62 words
The element of claim 17 wherein said dielectric layer is a cross-linked polymer, said polymeric binder is a cross-linked polymer, said electroconductive powder comprises mica core powder particles, the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.6 to about 1.3, and said conductive layer has a coating weight of about 1 to about 8 gm/m².
Claim 25
Dependent Claim
48 words
The element of claim 17 wherein said electroconductive powder is a mixture of about 25% by weight to about 75% by weight of one sized particle, and about 75% weight to about 25% by weight is a different sized particle based on the total weight of electroconductive powder.
Claim 26
Dependent Claim
17 words
The element of claim 24 additionally comprising a grounding stripe on the edge of the dielectric layer.
Claim 27
Dependent Claim
18 words
The element of claim 24 wherein both said dielectric layer and said conductive layer are coated from water.
Claim 28
Dependent Claim
10 words
The element of claim 7 wherein said base is paper.
Claim 29
Dependent Claim
13 words
The element of claim 28 wherein said polymeric binder is a cross-linked polymer.
Claim 30
Dependent Claim
13 words
The element of claim 28 wherein said dielectric layer is a cross-linked polymer.
Claim 31
Dependent Claim
15 words
The element of claim 28 additionally comprising a back coating of an aqueous salt solution.
Claim 32
Dependent Claim
13 words
The element of claim 28 additionally comprising an ionic conductor in the paper.
Claim 33
Dependent Claim
25 words
The element of claim 28 wherein the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.6 to about 1.3.
Claim 34
Dependent Claim
20 words
The element of claim 28 wherein said conductive layer has a coating weight of about 1 to about 20 gm/m².
Claim 35
Dependent Claim
40 words
The element of claim 28 wherein said dielectric layer is a cross-linked polymer, said polymeric binder is a cross-linked polymer, and the ratio of the weight of said electroconductive powder to said polymeric binder is about 0.6 to about 1.3.
Claim 36
Dependent Claim
49 words
The element of claim 28 wherein said electroconductive powder is a mixture of about 25% by weight to about 75% by weight of one sized particle, and about 75% by weight to about 25% by weight is a different sized particle based on the total weight of electroconductive powder.
References Cited (Backward Citations)
No citation records indexed.
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