US3170381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable drum for a rotary exposure unit
Assignee: Robertson Photo-Mechanix Inc
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Filing: 1963-03-28
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Granted: 1965-02-23
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Wanielista Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:59
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/24; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/18; G03B27/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
IN DRUM-TYPE PHOTOGRAPHIC EXPOSURE APPARATUS, A PAIR OF END PLATES MOUNTED FOR ROTATION, EACH OF SAID END PLATES HAVING A SIDE FACE FACING TOWARD AND PARALLEL TO THE SIDE FACE OF THE OTHER OF SAID END PLATES, MEANS DEFINING A PLURALITY OF RADIALLY SPACED ANNULARLY SHAPED RIBS AND GROOVES ON SAID SIDE FACES, SAID RIBS AND GROOVES BEING ARRANGED IN REGISTRY WITH CORRESPONDING RIBS AND GROOVES OF THE OTHER SIDE FACE, DRUM PLATE MEANS COMPRISING A PLATE EXTENDING BETWEEN SAID END PLATES AND SLIDABLY INSERTED INTO A PAIR OF GROOVES TO FORM A CYLINDER OF SELECTED SIZE, INLET MEANS FORMED IN SAID SIDE FACES TO LEAD SAID PLATE MEANS INTO ANY PAIR OF SAID CORRESPONDING GROOVES, AND MEANS TO EFFECT ROTATION OF SAID END PLATES.
Claim 2
Dependent Claim
125 words
IN DRUM-TYPE PHOTOGRAPHIC EXPOSURE APPARATUS, A PAIR OF END PLATES MOUNTED FOR ROTATION, EACH OF SAID END PLATES HAVING A SIDE FACE FACING TOWARD AND PARALLEL TO THE SIDE FACE OF THE OTHER OF SAID END PLATES, MEANS DEFINING A PLURALITY OF RADIALLY SPACED ANNULARLY SHAPED RIBS AND GROOVES ON SAID SIDE FACES, SAID RIBS AND GROOVES BEING ARRANGED IN REGISTRY WITH CORRESPONDING RIBS AND GROOVES OF THE OTHER SIDE FACE, DRUM PLATE MEANS COMPRISING A PLATE EXTENDING BETWEEN SAID END PLATES AND SLIDABLY INSERTED INTO A PAIR OF GROOVES TO FORM A CYLINDER OF SELECTED SIZE, INLET MEANS FORMED IN SAID SIDE FACES TO LEAD SAID PLATE MEANS INTO ANY PAIR OF SAID CORRESPONDING GROOVES, AND MEANS TO EFFECT ROTATION OF SAID END PLATES.
Claim 3
Dependent Claim
35 words
IN DRUM-TYPE PHOTOGRAPHIC EXPOSURE APPARATUS FOR SUBJECTING PHOTOSENSITIVE MATERIAL TO A LIGHT TREATMENT, A LIGHT SOURCE, A VACUUM SYSTEM AND A PAIR OF AXIALLY ALIGNED SPINDLE SHAFTS POSITIONED IN SPACED RELATION TO SAID LIGHT SOURCE,
Claim 4
Dependent Claim
35 words
IN DRUM-TYPE PHOTOGRAPHIC EXPOSURE APPARATUS FOR SUBJECTING PHOTOSENSITIVE MATERIAL TO A LIGHT TREATMENT, A LIGHT SOURCE, A VACUUM SYSTEM AND A PAIR OF AXIALLY ALIGNED SPINDLE SHAFTS POSITIONED IN SPACED RELATION TO SAID LIGHT SOURCE,
References Cited (Backward Citations)
US327120A
Cited
US2560696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |