Patent US4237212A successfully refreshed from Google Patents.
US4237212A
Expired / Lapsed
US
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Process for forming images
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1979-02-13
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Granted: 1980-12-02
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Expires: 1999-02-13
Abstract
Abstract An image-forming agent selected from polyacids of molybdenum and tungsten and salts and complexes of these polyacids and disposed as a layer on at least one surface of a support substrate is reduced thereby being caused to undergo coloring in the form of an image and is then irradiated over its entire surface including thus colored parts and yet uncolored parts with long wavelength light rays which are absorbable by only the colored parts thereby to produce a colored image wherein the optical density of only the colored parts is selectively increased to a remarkable degree.
Inventors
- 👤 Eiichi Inoue
- 👤 Misturu Takeda
- 👤 Fumio Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; G; G03; G03C; G03C1/00; G03C1/72; G03C1/725; Y; Y10; Y10S; Y10S430/00; Y10S430/132; Y10S430/145
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
An image-forming process which comprises (1) irradiating at least 100 mJ/cm 2 of imagewise ultraviolet rays an image-forming agent selected from the group consisting of polyacids of molybedenum and tungsten, alkali metal salts and ammonium salts of said polyacids and amine complexes and metal complexes of said polyacids, said image-forming agent being provided in layer form on at least one surface of a substrate and co-existing with a reducing agent, thereby to cause the same to undergo reduction and coloring in the form of the image, (2) irradiating the entire expanse of the image-forming agent surface thus obtained including colored parts and yet uncolored parts with long wavelength light rays which are absorbable by only the colored parts thereby to form a colored image wherein only the colored parts selectively have remarkably increased optical densities, and (3) contacting residual image-forming agent remaining in non-image parts with an alkaline substance whereby said image-forming agent is caused to lose its image-forming capability.
Claim 2
Dependent Claim
160 words
An image-forming process which comprises (1) irradiating at least 100 mJ/cm 2 of imagewise ultraviolet rays an image-forming agent selected from the group consisting of polyacids of molybedenum and tungsten, alkali metal salts and ammonium salts of said polyacids and amine complexes and metal complexes of said polyacids, said image-forming agent being provided in layer form on at least one surface of a substrate and co-existing with a reducing agent, thereby to cause the same to undergo reduction and coloring in the form of the image, (2) irradiating the entire expanse of the image-forming agent surface thus obtained including colored parts and yet uncolored parts with long wavelength light rays which are absorbable by only the colored parts thereby to form a colored image wherein only the colored parts selectively have remarkably increased optical densities, and (3) contacting residual image-forming agent remaining in non-image parts with an alkaline substance whereby said image-forming agent is caused to lose its image-forming capability.
Claim 3
Dependent Claim
20 words
An image-forming process as claimed in claim 1 in which the layer of the image-forming agent contains the reducing agent.
Claim 4
Dependent Claim
23 words
An image-forming process as claimed in claim 1 in which the substrate is made of paper which also acts as the reducing agent.
Claim 5
Dependent Claim
73 words
An image-forming process as claimed in claim 1 in which the image-forming agent is at least one member selected from the group consisting of molybdic acid, sodium molybdate, ammonium molybdate, phosphomolybdic acid, ammonium phosphomolybdate, silicomolybdic acid, ammonium silicomolybdate, silicomolybdic acid, ammonium silicomolybdate, arsenomolybdic acid, ammonium arsenomolybdate, sodium arsenomolybdate, tungstic acid, ammonium tungstate, phosphotungstic acid, ammonium phosphotungstate, silicotungstic acid, ammonium silicotungstate, sodium silicotungstate, arsenotungstic acid, ammonium arsenotungstate, sodium arsenotungstate, isopropylammonium molybdate, and phosphovanadomolybdic acid.
Claim 6
Dependent Claim
27 words
An image-forming process as claimed in claim 1 in which the reducing agent is a member selected from the group consisting of D-glucose and reducing polymer compounds.
Claim 7
Dependent Claim
17 words
An image-forming process as claimed in claim 1 in which the image-forming agent layer contains a binder.
Claim 8
Dependent Claim
30 words
An image-forming process as claimed in claim 1 in which the image-forming agent surface after the coloring is irradiated with more than 2.5 J/cm 2 of long wavelength light rays.
Claim 9
Dependent Claim
27 words
An image-forming process as claimed in claim 1 in which the layer of the image-forming agent has a thickness of the order of 2 to 20 microns.
Claim 10
Dependent Claim
28 words
An image-forming process as claimed in claim 6 in which the binder is selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, polyvinyl butyrals and cellulose esters.
Claim 11
Dependent Claim
47 words
An image-forming process as claimed in claim 6 in which the binder is present at a concentration of 10 to 60% by weight, and the image-forming agent is present at a concentration of not less than 15% by weight, both in the layer of the film-forming agent.
Claim 12
Dependent Claim
50 words
An image-forming process as claimed in claim 1 in which said image-wise ultraviolet rays are produced by passing light-rays including ultraviolet rays through a transmission original, and said long wavelength light rays are produced by passing light-rays including visible and/or infrared rays through a filter for cutting off ultraviolet rays.
Claim 13
Dependent Claim
13 words
An image-forming process according to claim 1 which said alkaline substance is ammonia.
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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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |