US4263359A
Expired / Lapsed
US
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Charge receptor film for charge transfer imaging
Assignee: EIDP Inc
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Filing: 1979-04-05
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Granted: 1981-04-21
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Expires: 1999-04-05
Abstract
Abstract A charge receptor film element for charge transfer imaging comprising, in order, (a) support, e.g., transparent film, (b) conductive layer, e.g., metal, metal oxide, ammonium chloride salt, (c) thin dielectric layer bearing, e.g., transparent polyethylene terephthalate, (d) opaque dots, e.g., 3 to 50 micrometers in height, covering less than 10% of the total area of layer (c) which provide less than 0.05 background optical density. The element is useful for medical radiography, in eletrophotography, electrostatic printing, etc.
Inventors
- 👤 Earle L. Kitts, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A charge receptor film element for charge-transfer imaging which comprises, in order, (a) a support, (b) a conductive layer, (c) a thin transparent dielectric layer bearing (d) substantially uniformly sized and spaced opaque polymerized non-conductive dots covering less than 10% of the total area of layer (c), the opaque dots providing less than 0.05 background optical density and having a height of at least 3 micrometers.
Claim 2
Dependent Claim
66 words
A charge receptor film element for charge-transfer imaging which comprises, in order, (a) a support, (b) a conductive layer, (c) a thin transparent dielectric layer bearing (d) substantially uniformly sized and spaced opaque polymerized non-conductive dots covering less than 10% of the total area of layer (c), the opaque dots providing less than 0.05 background optical density and having a height of at least 3 micrometers.
Claim 3
Dependent Claim
16 words
A charge receptor film element according to claim 1 wherein the support is a transparent film.
Claim 4
Dependent Claim
16 words
A charge receptor film element according to claim 2 wherein the transparent film is polyethylene terephthalate.
Claim 5
Dependent Claim
19 words
A charge receptor film element according to claim 1 wherein the conductive layer is a transparent electroconductive resin layer.
Claim 6
Dependent Claim
18 words
A charge receptor film element according to claim 4 wherein the electroconductive resin layer is polyvinylbenzyltrimethyl ammonium chloride.
Claim 7
Dependent Claim
20 words
A charge receptor film element according to claim 1 wherein the conductive layer is transparent metal or metal oxide layer.
Claim 8
Dependent Claim
17 words
A charge receptor film element according to claim 6 wherein the conductive layer is an aluminum layer.
Claim 9
Dependent Claim
19 words
A charge receptor film element according to claim 1 wherein the transparent dielectric layer is a polyethylene terephthalate film.
Claim 10
Dependent Claim
26 words
A charge receptor film element according to claim 1 wherein the opaque dots are formed from a photopolymerizable layer, 3 micrometers to 50 micrometers in thickness.
Claim 11
Dependent Claim
20 words
A charge receptor film element according to claim 9 wherein the opaque dots are photopolymerized dots containing carbon black pigment.
Claim 12
Dependent Claim
17 words
A charge receptor film element for charge-transfer imaging which comprises, in order, (a) a transparent film support,
Claim 13
Dependent Claim
17 words
A charge receptor film element for charge-transfer imaging which comprises, in order, (a) a transparent film support,
Claim 14
Dependent Claim
81 words
(b) a transparent electroconductive layer, 10 -8 to 10 -1 mm in thickness, having an electrical resistance in the range of 10 9 to 10 -4 ohms/cm 2 , (c) a thin transparent dielectric film layer, about 0.0064 to 0.019 mm in thickness, bearing (d) substantially uniformly sized and spaced opaque polymerized non-conductive microdots covering less than 5% of the total area of layer (c), the opaque dots providing 0.02 background optical density and having a height of about 7 micrometers.
Claim 15
Dependent Claim
81 words
(b) a transparent electroconductive layer, 10 -8 to 10 -1 mm in thickness, having an electrical resistance in the range of 10 9 to 10 -4 ohms/cm 2 , (c) a thin transparent dielectric film layer, about 0.0064 to 0.019 mm in thickness, bearing (d) substantially uniformly sized and spaced opaque polymerized non-conductive microdots covering less than 5% of the total area of layer (c), the opaque dots providing 0.02 background optical density and having a height of about 7 micrometers.
Claim 16
Dependent Claim
18 words
A charge receptor film element according to claim 11 wherein layers (a) and (c) are polyethylene terephthalate films.
Claim 17
Dependent Claim
22 words
A charge receptor film element according to claim 12 wherein the transparent electroconductive layer is a resin layer of polyvinylbenzyltrimethyl ammonium chloride.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |