US3835780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of printing by driography
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1973-05-16
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Granted: 1974-09-17
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Expires: 1993-05-16
Abstract
Abstract A metallic base photographic plate having images adherently and preferably conductively bonded to the metallic support is produced by contacting with metal image forming materials such as a photographic physical developer and imaging medium comprising a physically developable image. A preferred process is one utilizing a copy medium capable of being rapidly processed and having a layer of a photoconductor-binder emulsion on a roughened metallic support and a physical developer capable of producing an image adherently and conductively bonded to the metallic support. The plate produced by this invention is especially useful as a printing plate, having the capability of producing high resolutions and continuous tone prints.
Inventors
- 👤 R Gracia
- 👤 R Laughrey
- 👤 P Tuohey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:53
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/105; H05K3/106; G; G03; G03C; G03C1/00; G03C1/52; G03C1/62; G03C5/00; G03C5/58; G03F; G03F7/00; G03F7/004; G03F7/0042; G03F7/0043; G03F7/06; H05K3/20
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
29 words
Process as in claim 1 wherein subsequent to step (a) and prior to step (b), the step of increasing the oleophilicity of the metal image formed in step (a).
Claim 2
Dependent Claim
48 words
Process as in claim 2 wherein the step of increasing the oleophilicity of the metal image comprises contacting with a bath selected from the group consisting of a copperizing bath, a mercaptan compound-containing bath, an oleophilic lacquer solution and a bath containing a mercaptan compound and phosphoric acid.
Claim 3
Dependent Claim
18 words
Process as in claim 1 wherein the physically developable image is produced from an exposure of photosensitive material.
Claim 4
Dependent Claim
22 words
Process as in claim 4 wherein subsequent to step (a) and prior to step (b), the step of removing the photosensitive material.
Claim 5
Dependent Claim
12 words
Process as in claim 5 wherein the photosensitive material comprises a photoconductor.
Claim 6
Dependent Claim
38 words
A process as in claim 4 wherein the photosensitive material comprises a photosensitive material at least one member of which is selected from the group consisting of a metal oxide and a silver halide deposited in a binder.
Claim 7
Dependent Claim
21 words
Process as in claim 7 wherein the physical developer comprises silver, copper, nickel or tin ions, including a reducing agent therefor.
Claim 8
Dependent Claim
15 words
Process as in claim 7 wherein the photosensitive material is deposited upon a metal substrate.
Claim 9
Dependent Claim
159 words
Process of driographic printing consisting essentially of: a. exposing a copy medium comprising a thin photosensitive layer on a roughened support to form a physically developable image in said layer; b. contacting said medium with image forming materials comprising a source of metal ions and wherein the thickness of the physically developable image, the roughness of the support, the proximity of the physically developable image with respect to the surface of the support, and the length of contacting of said medium with said image forming materials being such as to thereby form a coherent metal image in said photosensitive layer which is adherently bonded and in intimate contact with said support; c. contacting the surface of the metal imaged medium with a low tack printing ink which selectively adheres in an image pattern to the imaged medium; and d. transferring the image pattern of ink onto a receptor sheet for said ink to produce prints of the original image.
Claim 10
Dependent Claim
88 words
Process as in claim 10 wherein subsequent to step (b) and prior to step (c), the step of increasing the oleophilicity of the metal image and wHerein the physically developable image is at least one member selected from the group consisting of (1) the latent metal image formed on photoexposure of the photosensitive layer, (2) the irreversible image formed by contacting an exposed photoconductor layer with a sensitizing metal ion, and (3) the latent ferrous ion image formed by photoexposure of a photosensitive layer comprising a ferric salt.
Claim 11
Dependent Claim
48 words
Process as in claim 11 wherein the step of increasing the oleophilicity of the metal image compriss contacting with a bath selected from the group consisting of a copperizing bath, a mercaptan compound-containing bath, an oleophilic lacquer solution and a bath containing a mercaptan compound and phosphoric acid.
Claim 12
Dependent Claim
20 words
Process as in claim 10 wherein the physically developable image is produced in the exposed portions of the photosensitive layer.
Claim 13
Dependent Claim
22 words
Process as in claim 10 wherein subsequent to step (b) and prior to step (c), the step of removing the photosensitive material.
Claim 14
Dependent Claim
16 words
Process as in claim 10 wherein the photosensitive material of the photosensitive layer comprises a photoconductor.
Claim 15
Dependent Claim
16 words
Process as in claim 10 wherein the photoconductor comprises silver halide, titanium dioxide, or zinc oxide.
Claim 16
Dependent Claim
12 words
Process as in claim 16 wherein the photosensitive material comprises silver halide.
Claim 17
Dependent Claim
20 words
Process as in claim 10 wherein the image forming materials additionally comprise a chemical reducing agent for said metal ions.
Claim 18
Dependent Claim
15 words
Process as in claim 18 wherein the metal ions comprise silver ions or copper ions.
Claim 19
Dependent Claim
33 words
Process as in claim 10 wherein the photosensitive material of the photosensitive layer comprises silver halide having a thickness of less than about 2 microns and wherein the metal ions are silver ions.
Claim 20
Dependent Claim
35 words
Process as in claim 10 wherein the support is a metal support, the surface of which has been physically roughened and contains an insulating layer between the photosensitive layer and the metal of the support.
Claim 21
Dependent Claim
33 words
Process as in claim 21 wherein the metal of the support is aluminum and wherein the insulating layer is a solvent impermeable aluminum oxide layer having a thickness of at least about 100A.
Claim 22
Dependent Claim
22 words
Process as in claim 22 wherein the image forming materials comprise a physical developer comprising silver ions and a chemical reducing agent.
Claim 23
Dependent Claim
21 words
Process as in claim 23 wherein the photosensitive material of the photosensitive layer comprises silver halide, titanium dioxide, or zinc oxide.
Claim 24
Dependent Claim
8 words
Print produced by the process of claim 10.
Claim 25
Dependent Claim
10 words
Continuous tone print produced by the process of claim 21.
Claim 26
Dependent Claim
151 words
Process of printing by driography comprising: a. forming a physically developable image in a photosensitive layer of a copy medium comprising said photosensitive layer on a roughened support, the thickness of the photosensitive layer being less than about 2 microns; b. contacting said medium with image forming materials comprising a source of metal ions for a period of time sufficient to produce a coherent, metal image adherently bonded to the medium and capable of being used on a conventional offset lithographic press under ordinary operating conditions to produce inked paper prints; c. coating the non-image areas of the plate with a polysiloxane elastomeric polymer; d. contacting the surface of the metal imaged medium with low tack printing ink which selectively adheres in an image pattern to the imaged medium; and e. transferring the image pattern of ink onto a receptor sheet for said ink to produce prints of the original image.
Claim 27
Dependent Claim
17 words
Process as in claim 27 wherein the photosensitive material comprises silver halide, titanium dioxide, or zinc oxide.
Claim 28
Dependent Claim
12 words
Process as in claim 28 wherein the photosensitive material comprises silver halide.
Claim 29
Dependent Claim
20 words
Process as in claim 27 wherein the image forming materials additionally comprise a chemical reducing agent for said metal ions.
Claim 30
Dependent Claim
12 words
Process as in claim 30 wherein the metal ions comprise silver ions.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |