Patent US2862818A successfully refreshed from Google Patents.
US2862818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous exposure-process-view process with light sealing means
Assignee: Kelvin Hughes Ltd
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Filing: 1955-05-03
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Granted: 1958-12-02
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Expires: 1975-05-03
Abstract
No abstract record available.
Inventors
- 👤 Tyler Frank
- 👤 Christopher H C Walker
- 👤 Eustace R Townley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/303
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
A PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF SIMULTANEOUSLY EXPOSING, PROCESSING AND VIEWING DIFFERENT PORTIONS OF A PHOTOGRAPHIC BASE CARRYING PHOTOGRAPHIC MATERIAL AT DIFFERENT POSITIONS ALONG ITS LENGTH, MOVING AND GUIDING SAID BASE SO THAT EXPOSED PORTIONS MOVE FIRST TO THE PROCESSING POSITION AND THEN TO THE VIEWING POSITION, AND CRIMPING SAID BASE AT POSITIONS LOCATED BETWEEN SUCESSIVE PORTIONS WHILE SAID POSITIONS ARE DISPOSED BETWEEN THE EXPOSURE POSITION AND THE PROCESSING POSITION, SAID CRIMPING FORMING A VALLEY IN THE STRIP AT EACH SUCH POSITIONS, THE ANGLE OF THE VALLEY BEING SELECTED SUCH THAT THE LIGHT WHICH IS REQUIRED FOR VIEWING AND WHICH IS TRANSMITTED ALONG THE BASE, IS INCIDENT ON THE SURFACE OF THE BASE AT AN ANGLE LESS THAN THE CRITICAL ANGLE FOR TOTAL REFLECTION OF LIGHT IN THE BASE WHEREBY THIS LIGHT IS REFRACTED OUT OF SAID BASE BEFORE REACTING THE UNPROCESSED AND UNEXPOSED PARTS OF SAID MATERIAL.
Claim 2
Dependent Claim
149 words
A PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF SIMULTANEOUSLY EXPOSING, PROCESSING AND VIEWING DIFFERENT PORTIONS OF A PHOTOGRAPHIC BASE CARRYING PHOTOGRAPHIC MATERIAL AT DIFFERENT POSITIONS ALONG ITS LENGTH, MOVING AND GUIDING SAID BASE SO THAT EXPOSED PORTIONS MOVE FIRST TO THE PROCESSING POSITION AND THEN TO THE VIEWING POSITION, AND CRIMPING SAID BASE AT POSITIONS LOCATED BETWEEN SUCESSIVE PORTIONS WHILE SAID POSITIONS ARE DISPOSED BETWEEN THE EXPOSURE POSITION AND THE PROCESSING POSITION, SAID CRIMPING FORMING A VALLEY IN THE STRIP AT EACH SUCH POSITIONS, THE ANGLE OF THE VALLEY BEING SELECTED SUCH THAT THE LIGHT WHICH IS REQUIRED FOR VIEWING AND WHICH IS TRANSMITTED ALONG THE BASE, IS INCIDENT ON THE SURFACE OF THE BASE AT AN ANGLE LESS THAN THE CRITICAL ANGLE FOR TOTAL REFLECTION OF LIGHT IN THE BASE WHEREBY THIS LIGHT IS REFRACTED OUT OF SAID BASE BEFORE REACTING THE UNPROCESSED AND UNEXPOSED PARTS OF SAID MATERIAL.
Claim 3
Dependent Claim
79 words
COMPRISING UPPER AND LOWER GUIDE SURFACES, MEANS FOR MOVING THE SHEET BASE THROUGH THE GUIDE SURFACES, OPENINGS IN ONE GUIDE SURFACE FOR EXPOSURE, PROCESSING AND EXHIBITING RESPECTIVELY, A CRIMPING RECESS IN ONE OF SAID SURFACES, AN OPENING IN THE OTHER OF SAID SURFACES BETWEEN THE SAID EXPOSURE AND PROCESSING OPENINGS, A RECIPROCABLE MEMBER IN SAID LATER OPENING FOR PRESSING THE FILM INTO SAID RECESS, AND MEANS FOR OPERATING SAID MEMBER IN TIMED RELATION WITH THE SHEET BASE MOVING MEANS.
Claim 4
Dependent Claim
79 words
COMPRISING UPPER AND LOWER GUIDE SURFACES, MEANS FOR MOVING THE SHEET BASE THROUGH THE GUIDE SURFACES, OPENINGS IN ONE GUIDE SURFACE FOR EXPOSURE, PROCESSING AND EXHIBITING RESPECTIVELY, A CRIMPING RECESS IN ONE OF SAID SURFACES, AN OPENING IN THE OTHER OF SAID SURFACES BETWEEN THE SAID EXPOSURE AND PROCESSING OPENINGS, A RECIPROCABLE MEMBER IN SAID LATER OPENING FOR PRESSING THE FILM INTO SAID RECESS, AND MEANS FOR OPERATING SAID MEMBER IN TIMED RELATION WITH THE SHEET BASE MOVING MEANS.
Claim 5
Independent Claim
9 words
AN APPARATUS FOR CARRYING OUT THE PROCESS OF CLAIM
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |