Patent US3246400A successfully refreshed from Google Patents.
US3246400A
Expired / Lapsed
US
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Drying drum
Assignee: Bell and Howell Co
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Filing: 1962-06-25
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Granted: 1966-04-19
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Richard P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:12
CPC Classifications
G; G03; G03D; G03D15/00; G03D15/02; G03D15/022; G01; G01D; G01D15/00; G01D15/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
APPARATUS FOR DRYING A STRIP OF WET PHOTOGRAPHIC MATERIAL OF INDETERMINANT LENGTH, COMPRISING (A) A ROTATABLE HEATED DRUM HAVING A CIRCULARLY CYLINDRICAL EXTERIOR SURFACE MAINTAINED AT A SELECTED TEMPERATURE SUBSTANTIALLY UNIFORMLY THEREOVER, (B) MEANS FOR INTIMATELY ENGAGING THE WET STRIP WITH THE DRUM AROUND A PORTION OF THE PERIPHERY OF THE DRUM, THE STRIP SHRINKING AS IT DRIES IN PROPORTION TO THE HEAT APPLIED THERETO, (C) THE SURFACE OF THE DRUM ENGAGED BY THE STRIP DEFINING A PLURALITY OF SMALL CLOSELY-SPACED GROOVES AND LANDS FOR RECEIVING AND DIRECTING AWAY FROM THE STRIP VAPORS PRODUCED AS THE STRIP IS DRIED, THE GROOVES BEING DISPOSED AND ARRANGED ON THE DRUM SO THAT THE STRIP IS MAINGAINED AT SUBSTANTIALLY UNIFORM TEMPERATURE ALONG LINES TRANSVERSE TO ITS LENGTH SO THAT THE STRIP SHRINKS UNIFORMLY TRANSVERSELY OF ITS LENGTH AND THE LANDS HAVING A WIDTH AT LEST TWICE THE WIDTH OF THE GROOVES.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |