US4154612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making silver halide photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1978-01-05
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Granted: 1979-05-15
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Expires: 1998-01-05
Abstract
Abstract In making silver halide photographic light-sensitive materials, a method of drying a layer of silver halide emulsion coated on a support is disclosed. The coated film is cooled and set, and thereafter a normal portion of the coated film is dried and undried thickly coated portions of the coated film are then dried by use of microwaves.
Inventors
- 👤 Minoru Minoda
- 👤 Masaharu Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; G03C2001/7451
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
In a method of making silver halide photographic light-sensitive materials by coating a continuously travelling web with at least one silver halide emulsion and cooling, setting, drying and humidifying the same, wherein said web is coated with areas of the desired thickness and areas of a thickness greater than the desired thickness, improvement which comprises, after said coated film is cooled and set, drying said desired thickness areas by a drying method other than the application of microwaves, and then drying undried areas of a thickness greater than the desired thickness by the application of microwaves.
Claim 2
Dependent Claim
96 words
In a method of making silver halide photographic light-sensitive materials by coating a continuously travelling web with at least one silver halide emulsion and cooling, setting, drying and humidifying the same, wherein said web is coated with areas of the desired thickness and areas of a thickness greater than the desired thickness, improvement which comprises, after said coated film is cooled and set, drying said desired thickness areas by a drying method other than the application of microwaves, and then drying undried areas of a thickness greater than the desired thickness by the application of microwaves.
Claim 3
Dependent Claim
32 words
The method of claim 1, wherein said areas of a thickness greather than said desired thickness areas have a thickness of from about 120% to about 300% that of the desired thickness.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the initial drying is accomplished by blowing air against said coated film.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein said microwave drying is accomplished within about 3 to about 30 seconds.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein said web is travelling at a rate of from 20 to about 200 m/min.
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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |