US4353977A
Expired / Lapsed
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Method for forming a photosensitive silver halide element
Assignee: Polaroid Corp
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Filing: 1981-09-02
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Granted: 1982-10-12
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Expires: 2001-09-02
Abstract
Abstract A photosensitive silver halide element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array is prepared by a method which comprises at least partially coalescing fine-grain silver halide in a plurality of spaced depressions in a hydrophobic layer, superposing said layer with a hydrophilic layer during or subsequent to said coalescence, and then separating said hydrophilic layer and said hydrophobic layer whereby said coalesced silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.
Inventors
- 👤 Arthur M. Gerber
- 👤 Warren D. Slafer
- 👤 Vivian K. Walworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/149
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
78 words
A method for forming a photosensitive element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array which comprises at least partially coalescing fine-grain silver halide in a plurality of depressions in a hydrophobic layer, superposing a hydrophilic layer and said hydrophobic layer, and thereafter separating said hydrophilic layer from said hydrophobic layer, whereby silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.
Claim 2
Independent Claim
78 words
A method for forming a photosensitive element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array which comprises at least partially coalescing fine-grain silver halide in a plurality of depressions in a hydrophobic layer, superposing a hydrophilic layer and said hydrophobic layer, and thereafter separating said hydrophilic layer from said hydrophobic layer, whereby silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said fine-grain silver halide is coalesced to single effective grains.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said hydrophilic layer is superposed subsequent to said coalescence.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said hydrophilic layer is superposed substantially contemporaneously with said coalescence.
Claim 6
Dependent Claim
19 words
The method of claim 3 which includes the step of washing said grains prior to superposing said hydrophilic layer.
Claim 7
Dependent Claim
20 words
The method of claim 3 which includes the step of spectrally sensitizing said grains prior to superposing said hydrophilic layer.
Claim 8
Dependent Claim
20 words
The method of claim 3 which includes the step of chemically sensitizing said grains prior to superposing said hydrophilic layer.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein said hydrophilic layer includes gelatin.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein said hydrophilic layer consists essentially of gelatin.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein said hydrophilic layer is polyvinyl alcohol.
Claim 12
Dependent Claim
13 words
The method of claim 9 wherein said gelatin is carried on a support.
Claim 13
Dependent Claim
13 words
The method of claim 1 wherein said hydrophobic layer is cellulose acetate butyrate.
Claim 14
Dependent Claim
19 words
The method of claim 1 which comprises carrying out said coalescence with a solution of a silver halide solvent.
Claim 15
Dependent Claim
16 words
The method of claim 13 wherein said solution of silver halide solvent contains a silver salt.
Claim 16
Dependent Claim
20 words
The method of claim 1 which includes the step of depositing a fine-grain silver halide emulsion in said spaced depressions.
Claim 17
Dependent Claim
19 words
The method of claim 15 wherein said fine-grain emulsion comprises grains about 0.01 to 0.50 μm in average diameter.
Claim 18
Dependent Claim
18 words
The method of claim 16 wherein said fine-grain emulsion comprises grains about 0.1 μm or less in diameter.
Claim 19
Dependent Claim
20 words
The method of claim 15 wherein said fine-grain emulsion has a binder to silver ratio of about 0.1 or less.
Claim 20
Dependent Claim
14 words
The method of claim 18 wherein said binder to silver ratio is about 0.075.
Claim 21
Dependent Claim
13 words
The method of claim 18 wherein said silver halide solvent is ammonium thiocyanate.
Claim 22
Dependent Claim
12 words
The method of claim 14 wherein said silver salt is silver thiocyanate.
Claim 23
Dependent Claim
12 words
The method of claim 14 wherein said silver salt is silver bromide.
Claim 24
Dependent Claim
17 words
The method of claim 13 wherein said solution of silver halide solvent includes a polymeric binder material.
Claim 25
Dependent Claim
12 words
The method of claim 23 wherein said polymeric binder material is gelatin.
Claim 26
Dependent Claim
24 words
The method of claim 1 wherein said coalescence includes the application of heat subsequent to the application of said solution of silver halide solvent.
Claim 27
Dependent Claim
17 words
The method of claim 25 which includes the step of cooling subsequent to said application of heat.
Claim 28
Independent Claim
129 words
A method for forming a photosensitive element comprising a support carrying a plurality of single effective silver halide grains in a predetermined spaced array which comprises the following steps: (a) depositing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a hydrophobic layer; (b) applying a solution of silver halide solvent in an amount sufficient to partially dissolve said silver halide grains in each depression; (c) coalescing said grains to a single effective silver halide grain in substantially each depression; (d) superposing said hydrophobic layer and a hydrophilic layer; and (e) separating said hydrophilic layer from said hydrophobic layer whereby the thus-formed single effective silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to said pattern of said spaced depressions.
Claim 29
Independent Claim
129 words
A method for forming a photosensitive element comprising a support carrying a plurality of single effective silver halide grains in a predetermined spaced array which comprises the following steps: (a) depositing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a hydrophobic layer; (b) applying a solution of silver halide solvent in an amount sufficient to partially dissolve said silver halide grains in each depression; (c) coalescing said grains to a single effective silver halide grain in substantially each depression; (d) superposing said hydrophobic layer and a hydrophilic layer; and (e) separating said hydrophilic layer from said hydrophobic layer whereby the thus-formed single effective silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to said pattern of said spaced depressions.
Claim 30
Dependent Claim
29 words
The method of claim 27 which includes the step of superposing said hydrophilic layer over said depressions substantially contemporaneously with the application of said solution of silver halide solvent.
Claim 31
Dependent Claim
21 words
The method of claim 27 which includes the step of superposing said hydrophilic layer over said depressions subsequent to said coalescence.
Claim 32
Dependent Claim
19 words
The method of claim 29 which includes the step of washing said grains prior to superposing said hydrophilic layer.
Claim 33
Dependent Claim
20 words
The method of claim 29 which includes the step of spectrally sensitizing said grains prior to superposing said hydrophilic layer.
Claim 34
Dependent Claim
20 words
The method of claim 29 which includes the step of chemically sensitizing said grains prior to superposing said hydrophilic layer.
Claim 35
Dependent Claim
37 words
The method of claim 27 wherein said solution of silver halide solvent is disposed in a nip formed by said hydrophilic layer and said hydrophobic layer and applying pressure to said hydrophilic layer and said hydrophobic layer.
Claim 36
Dependent Claim
23 words
The method of claim 33 wherein said pressure is applied by passing said hydrophilic layer and said hydrophobic layer between pressure applying rollers.
Claim 37
Dependent Claim
21 words
The method of claim 27 wherein said coalescence includes the application of heat subsequent to said application of silver halide solvent.
Claim 38
Dependent Claim
17 words
The method of claim 35 which includes the step of cooling subsequent to said application of heat.
Claim 39
Dependent Claim
11 words
The method of claim 27 wherein said hydrophilic layer includes gelatin.
Claim 40
Dependent Claim
13 words
The method of claim 27 wherein said hydrophilic layer consists essentially of gelatin.
Claim 41
Dependent Claim
12 words
The method of claim 27 wherein said hydrophilic layer is polyvinyl alcohol.
Claim 42
Dependent Claim
13 words
The method of claim 27 wherein said hydrophobic layer is cellulose acetate butyrate.
Claim 43
Dependent Claim
13 words
The method of claim 37 wherein said gelatin is carried on a support.
Claim 44
Dependent Claim
16 words
The method of claim 27 wherein said solution of silver halide solvent contains a silver salt.
Claim 45
Dependent Claim
19 words
The method of claim 27 wherein said fine-grain emulsion comprises grains about 0.01 to 0.50 μm in average diameter.
Claim 46
Dependent Claim
18 words
The method of claim 43 wherein said fine-grain emulsion comprises grains about 0.1 μm of less in diameter.
Claim 47
Dependent Claim
20 words
The method of claim 27 wherein said fine-grain emulsion has a binder to silver ratio of about 0.1 or less.
Claim 48
Dependent Claim
14 words
The method of claim 45 wherein said binder to silver ratio is about 0.075.
Claim 49
Dependent Claim
13 words
The method of claim 27 wherein said silver halide solvent is ammonium thiocyanate.
Claim 50
Dependent Claim
12 words
The method of claim 42 wherein said silver salt is silver thiocyanate.
Claim 51
Dependent Claim
12 words
The method of claim 42 wherein said silver salt is silver bromide.
Claim 52
Dependent Claim
17 words
The method of claim 27 wherein said solution of silver halide solvent includes a polymeric binder material.
Claim 53
Dependent Claim
12 words
The method of claim 50 wherein said polymeric binder material is gelatin.
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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |