US5340676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging element comprising an electrically-conductive layer containing water-insoluble polymer particles
Assignee: Eastman Kodak Co
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Filing: 1993-03-18
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Granted: 1994-08-23
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Expires: 2013-03-18
Abstract
Abstract Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer and an electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles. The combination of hydrophilic colloid, metal-containing particles and water-insoluble polymer particles provides a controlled degree of electrical conductivity and beneficial chemical, physical and optical properties which adapt the electrically-conductive layer for such purposes as providing protection against static or serving as an electrode which takes part in an image-forming process.
Inventors
- 👤 Charles C. Anderson
- 👤 Mario D. DeLaura
- 👤 Paul A. Christian
- 👤 Ibrahim M. Shalhoub
- 👤 David F. Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:37
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M5/426; G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/853; G03C1/89; G03G; G03G5/00; G03G5/10; G03G5/104; G03G5/105; G03G5/108; B41M5/41; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
113 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 2
Dependent Claim
113 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 3
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles have an average particle size of less than 0.1 micrometers.
Claim 4
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles constitute 15 to 35 volume percent of said electrically-conductive layer.
Claim 5
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles exhibit a powder resistivity of 10 5 ohm-centimeters or less.
Claim 6
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are doped metal oxides.
Claim 7
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are metal oxides containing oxygen deficiencies.
Claim 8
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are metal nitrides, carbides or borides.
Claim 9
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are particles of antimony-doped tin oxide.
Claim 10
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are particles of aluminum-doped zinc oxide.
Claim 11
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said electrically-conductive metal-containing particles are particles of niobium-doped titanium oxide.
Claim 12
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said film-forming hydrophilic colloid is gelatin.
Claim 13
Dependent Claim
24 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles have an average particle size of from 20 to 300 nanometers.
Claim 14
Dependent Claim
56 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are selected from the group consisting of polymers of styrene, derivatives of styrene, alkyl acrylates, derivatives of alkyl acrylates, alkyl methacrylates, derivatives of alkyl methacrylates, olefins, vinylidene chloride, acrylonitrile, acrylamide, derivatives of acrylamide, methacrylamide, derivatives of methacrylamide, vinyl esters, vinyl ethers and urethanes.
Claim 15
Dependent Claim
29 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are particles of a terpolymer of styrene, n-butyl methacrylate and the sodium salt of 2-sulfoethyl methacrylate.
Claim 16
Dependent Claim
26 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are particles of a terpolymer of methyl acrylate, vinylidene chloride and iraconic acid.
Claim 17
Dependent Claim
18 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are particles of polymethyl methacrylate.
Claim 18
Dependent Claim
27 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles have a refractive index in the range of from about 1.3 to about 1.7.
Claim 19
Dependent Claim
22 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles have a refractive index of from 1.4 to 1.6.
Claim 20
Dependent Claim
37 words
An imaging element as claimed in claim 1, wherein said water-insoluble polymer particles are present in said electrically-conductive layer in an amount of from 0.5 to 2 parts per part by weight of said film-forming hydrophilic colloid.
Claim 21
Dependent Claim
27 words
An imaging element as claimed in claim 1, wherein said electrically-conductive layer has a dry weight coverage of from about 100 to about 1500 mg/m 2 .
Claim 22
Dependent Claim
68 words
An imaging element as claimed in claim 1, wherein said support is a transparent polymeric film, said image-forming layer is comprised of silver halide grains dispersed in gelatin, said film-forming hydrophilic colloid in said electrically-conductive layer is gelatin, said electrically-conductive metal-containing particles are antimony-doped tin oxide particles, and said electrically-conductive layer has a surface resistivity of less than 1×10 10 ohms/square and a UV-density of less than 0.015.
Claim 23
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said support is a cellulose acetate film.
Claim 24
Dependent Claim
21 words
An imaging element as claimed in claim 1, wherein said support is a poly(ethylene terephthalate) film or a poly(ethylene naphthalate) film.
Claim 25
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said element is a photographic film.
Claim 26
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said element is a photographic paper.
Claim 27
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said element is an electrostatographic element.
Claim 28
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said element is a photothermographic element.
Claim 29
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said element is an element adapted for use in a laser toner fusion process.
Claim 30
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said element is a thermal-dye-transfer receiver element.
Claim 31
Dependent Claim
122 words
A photographic film comprising: (1) a support; (2) an electrically-conductive layer which serves as an antistatic layer overlying said support; and (3) a silver halide emulsion layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 32
Dependent Claim
122 words
A photographic film comprising: (1) a support; (2) an electrically-conductive layer which serves as an antistatic layer overlying said support; and (3) a silver halide emulsion layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 33
Dependent Claim
136 words
A photographic film comprising: (1) a support; (2) a silver halide emulsion layer on one side of said support; (3) an electrically-conductive layer which serves as an antistatic layer on the opposite side of said support; and (4) an anti-curl layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 34
Dependent Claim
136 words
A photographic film comprising: (1) a support; (2) a silver halide emulsion layer on one side of said support; (3) an electrically-conductive layer which serves as an antistatic layer on the opposite side of said support; and (4) an anti-curl layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from about 10 to about 500 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 35
Dependent Claim
109 words
A photographic film comprising a cellulose ester or polyester support, an image-forming layer comprising a silver halide emulsion, and an electrically-conductive layer which serves as an antistatic layer; said electrically-conductive layer comprising gelatin having dispersed therein both electrically-conductive metal oxide particles and water-insoluble polymer particles, said electrically-conductive metal oxide particles having an average particle size of less than 0.1 micrometers and constituting 15 to 35 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from 20 to 300 nanometers and being present in said electrically-conductive layer in an amount of from 0.5 to 2 parts per part by weight of gelatin.
Claim 36
Dependent Claim
109 words
A photographic film comprising a cellulose ester or polyester support, an image-forming layer comprising a silver halide emulsion, and an electrically-conductive layer which serves as an antistatic layer; said electrically-conductive layer comprising gelatin having dispersed therein both electrically-conductive metal oxide particles and water-insoluble polymer particles, said electrically-conductive metal oxide particles having an average particle size of less than 0.1 micrometers and constituting 15 to 35 volume percent of said electrically-conductive layer, and said water-insoluble polymer particles having an average particle size of from 20 to 300 nanometers and being present in said electrically-conductive layer in an amount of from 0.5 to 2 parts per part by weight of gelatin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |