US4217409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming material comprising polyacids of Mo or W or their salts or complexes
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1979-01-15
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Granted: 1980-08-12
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Expires: 1999-01-15
Abstract
Abstract There is provided an image-forming material of a laminar structure comprising: a substrate; an image-forming layer provided on at least one surface of the substrate and containing an image-forming agent selected from the group consisting of polyacids of molybdenum and tungsten and salts and complexes of these polyacids; and a transparent polymer film provided on the image-forming layer, at least one of the image-forming layer and the transparent polymer film containing a reducing agent. The image-forming material may be used in a one-stage image-forming process comprising irradiation thereof with image-wise light-rays including ultraviolet and visible and/or infrared rays or a two-stage image-forming process comprising irradiation thereof with image-wise ultra-violet rays and then with visible and/or infrared rays.
Inventors
- 👤 Eiichi Inoue
- 👤 Misturu Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/725; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
214 words
A photographic image forming process which comprises irradiating an image-forming layer of an image-forming material with imagewise ultraviolet rays, said image-forming material comprising: a substrate; said image-forming layer provided on at least one surface of the substrate and containing an image-forming agent selected from the group consisting of of polyacids or molybdenum and tungsten and salts and complexes of these polyacids; and a transparent polymer film substantially free of said image-forming agent provided on the image-forming layer, wherein at least the transparent polymer film contains a weak reducing agent capable of reducing said image-forming agent when irradiated with ultraviolet rays, the transparent polymer film having a thickness of 5 to 15 microns and the image-forming layer having a thickness of 2 to 20 microns, said weak reducing agent being selected from the group consisting of D-glucose and reducing polymer compounds, each of the reducing polymer compounds being characterized in that when a mixture of one part by weight thereof with two parts by weight of phosphomolybdic acid is supplied as a film on a polyester film and irradiated for one hour by a 250 watt mercury lamp from a distance of 20 cm., the difference between the values of the MacBeth optical diffusion transmission density respectively before and after irradiation becomes greater than 0.01.
Claim 2
Dependent Claim
214 words
A photographic image forming process which comprises irradiating an image-forming layer of an image-forming material with imagewise ultraviolet rays, said image-forming material comprising: a substrate; said image-forming layer provided on at least one surface of the substrate and containing an image-forming agent selected from the group consisting of of polyacids or molybdenum and tungsten and salts and complexes of these polyacids; and a transparent polymer film substantially free of said image-forming agent provided on the image-forming layer, wherein at least the transparent polymer film contains a weak reducing agent capable of reducing said image-forming agent when irradiated with ultraviolet rays, the transparent polymer film having a thickness of 5 to 15 microns and the image-forming layer having a thickness of 2 to 20 microns, said weak reducing agent being selected from the group consisting of D-glucose and reducing polymer compounds, each of the reducing polymer compounds being characterized in that when a mixture of one part by weight thereof with two parts by weight of phosphomolybdic acid is supplied as a film on a polyester film and irradiated for one hour by a 250 watt mercury lamp from a distance of 20 cm., the difference between the values of the MacBeth optical diffusion transmission density respectively before and after irradiation becomes greater than 0.01.
Claim 3
Dependent Claim
70 words
A photosensitive 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, 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 4
Dependent Claim
19 words
A photosensitive image-forming process as claimed in claim 1 in which the image-forming agent layer further contains a binder.
Claim 5
Dependent Claim
39 words
A photosensitive image-forming process as claimed in claim 3 in which the binder is a polymer compound soluble in water or an alcohol, and the polymer compound forming the transparent polymer film is insoluble in water or an alcohol.
Claim 6
Dependent Claim
26 words
A photographic image-forming process as claimed in claim 1, in which the image-forming agent layer also contains a reducing polymer compound as defined in claim 1.
Claim 7
Dependent Claim
30 words
An image-forming process as claimed in claim 5 in which the reducing polymer compound is a member selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, and polyvinyl butyral.
Claim 8
Dependent Claim
48 words
An image-forming process as claimed in claim 1 in which the polymer compound constituting the transparent polymer film is a member selected from the group consisting of polyvinyl chloride, polyvinyl acetate, polyvinylidene chloride, cellulose resins, polystyrene, polypropylene, polyvinyl carbazol, polymethacrylate resins, polyamide resins, fluorine resins, and rubber chloride.
Claim 9
Dependent Claim
27 words
An image-forming process as claimed in claim 1 in which the concentration of the image-forming agent in the image-forming layer is greater than 15 percent by weight.
Claim 10
Dependent Claim
33 words
A photographic image-forming process as claimed in claim 1, in which both the image-forming layer and the transparent polymer film are free of any reducing agent other than those recited in claim 1.
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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |