US3976487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive printing plate
Assignee: Fujifilm Holdings Corp
•
Filing: 1971-07-14
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Granted: 1976-08-24
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Expires: 1991-07-14
Abstract
Abstract A photosensitive printing plate having excellent reproducibility of an original of continuous tone comprising a support having an oleophilic surface and formed thereon a diffusion transfer hydrophilic image-receiving layer containing nucleating materials for physical development and a photosensitive silver halide emulsion layer, said image-receiving layer containing an alginate or an image-receiving subsidiary layer containing an alginate present between said image-receiving layer and said photosensitive emulsion layer.
Inventors
- 👤 Kikuo Kubotera
- 👤 Eiichi Mizuki
- 👤 Hideo Kawano
- 👤 Tadahiro Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/07
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A method of producing a master having excellent continuous tone reproducility using a photosensitive printing plate comprising a support having thereon a diffusion transfer hydrophilic image-receiving layer containing nucleating material for physical development, a photosensitive silver halide emulsion layer, and an alginate-containing image-receiving subsidiary layer between said image-receiving layer and said photosensitive emulsion layer, said process comprising: a. exposing the printing plate to a continuous tone original through a contact screen;
Claim 2
Independent Claim
71 words
A method of producing a master having excellent continuous tone reproducility using a photosensitive printing plate comprising a support having thereon a diffusion transfer hydrophilic image-receiving layer containing nucleating material for physical development, a photosensitive silver halide emulsion layer, and an alginate-containing image-receiving subsidiary layer between said image-receiving layer and said photosensitive emulsion layer, said process comprising: a. exposing the printing plate to a continuous tone original through a contact screen;
Claim 3
Dependent Claim
67 words
b. chemically developing the resulting latent image in the photosensitive silver halide emulsion layer, whereby a silver image is formed in said image-receiving layer by diffusion of a complex salt of the silver halide from the unexposed portions of the photo-sensitive silver halide emulsion layer through said alginate-containing image-receiving subsidiary layer into the image-receiving layer; and c. processing the resulting printing material with an etching bleach solution.
Claim 4
Dependent Claim
67 words
b. chemically developing the resulting latent image in the photosensitive silver halide emulsion layer, whereby a silver image is formed in said image-receiving layer by diffusion of a complex salt of the silver halide from the unexposed portions of the photo-sensitive silver halide emulsion layer through said alginate-containing image-receiving subsidiary layer into the image-receiving layer; and c. processing the resulting printing material with an etching bleach solution.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the image-receiving layer is removed by water-washing after the development and prior to processing with the etching bleach solution.
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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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |