US3867227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing super smooth photo plates
Assignee: Jenoptik AG
•
Filing: 1973-01-12
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Granted: 1975-02-18
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Expires: 1993-01-12
Abstract
Abstract A supersmooth photo-plate is produced by utilization of a prefabricated photographic film, from which the photo-emulsion layer is severed by submitting said photographic film to a ''''severing'''' solution. The severed photo-emulsion layer is applied to a very smooth carrier. The resulting photo-plate possesses an even overall thickness and can assume stable values from 1 to 10 Mu .
Inventors
- 👤 Franz Klapper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/922; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/108; Y10T156/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A METHOD FOR PRODUCING A SUPER-SMOOTH PHOTO-PLATE COMPRISING THE STEPS OF SEVERING THE PHOTO-EMULSION LAYER FROM A CARRIER AFTER SUBMITTING A PREFABRICATED PHOTOGRAPHIC FILM TO AN AQUEOUS HYDRO-FLUORIC ACID BATH CONTAINING 0.1 TO 0.4 VOLUME PERCENT HYDRO-FLUORIC ACID, WASHING THE STRIPPED OFF PHOTO-EMULSION LAYER IS DISTILLED WATER IN ORDER TO REMOVE IMPURITIES AND RESIDUAL HYDROFLUORIC ACID, SUBSEQUENTLY APPLYING SAID PHOTO-EMULSION LAYER ON A CLEAN AND VERY SMOOTH CARRIER, SAID PHOTO-EMULSION LAYER PROJECTING OVER THE EDGE OF SAID CLEAN AND VERY SMOOTH CARRIER, AND CUTTING OFF THE PORTION OF THE PHOTO-EMULSION LAYER PROJECTING OVER THE CARRIER EDGE, REMOVING THE RESIDUAL WATER FROM SAID PHOTO-EMULSION LAYER BY MEANS OF A PRESSURE-GAS STREAM AND FINALLY DRYING THE RESULTING VERY SMOOTH PHOTO-PLATE AT A TEMPERATURE OF ABOUT 30*C.
Claim 2
Independent Claim
124 words
A METHOD FOR PRODUCING A SUPER-SMOOTH PHOTO-PLATE COMPRISING THE STEPS OF SEVERING THE PHOTO-EMULSION LAYER FROM A CARRIER AFTER SUBMITTING A PREFABRICATED PHOTOGRAPHIC FILM TO AN AQUEOUS HYDRO-FLUORIC ACID BATH CONTAINING 0.1 TO 0.4 VOLUME PERCENT HYDRO-FLUORIC ACID, WASHING THE STRIPPED OFF PHOTO-EMULSION LAYER IS DISTILLED WATER IN ORDER TO REMOVE IMPURITIES AND RESIDUAL HYDROFLUORIC ACID, SUBSEQUENTLY APPLYING SAID PHOTO-EMULSION LAYER ON A CLEAN AND VERY SMOOTH CARRIER, SAID PHOTO-EMULSION LAYER PROJECTING OVER THE EDGE OF SAID CLEAN AND VERY SMOOTH CARRIER, AND CUTTING OFF THE PORTION OF THE PHOTO-EMULSION LAYER PROJECTING OVER THE CARRIER EDGE, REMOVING THE RESIDUAL WATER FROM SAID PHOTO-EMULSION LAYER BY MEANS OF A PRESSURE-GAS STREAM AND FINALLY DRYING THE RESULTING VERY SMOOTH PHOTO-PLATE AT A TEMPERATURE OF ABOUT 30*C.
Claim 3
Dependent Claim
48 words
A method for producing a super-smooth photo-plate as claimed in claim 1, wherein the prefabricated photographic film is immersed into said 0.1 to 0.4 volume percent aqueous hydrofluoric acid bath for about 20 seconds, in order to expedite the action of severing said photo-emulsion layer from said carrier.
Claim 4
Dependent Claim
32 words
A method for producing super-smooth photo-plates as claimed in claim 1, wherein said photo-emulsion layer is removed from the distilled water bath and is applied under pressure to said very smooth carrier.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |