US3114989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doctor blade grinding machine
Assignee: Individual
•
Filing: 1961-10-30
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Granted: 1963-12-24
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:54
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A MACHINE FOR CONTINUOUSLY GRINDING ONE LONGITUDINAL EDGE OF AN ELONGATED FLEXIBLE BLADE HAVING A PAIR OF OPPOSED LONGITUDINAL EDGES AND ENDS COMPRISING A SUPPORT, A TURNTABLE MOUNTED ON SAID SUPPORT, MEANS FOR ROTATING SAID TURNTABLE ABOUT AN AXIS AND HAVING A CIRCULAR RIM TERMINATING AT ONE SIDE AND A CIRCUMFERENTIAL SHOULDER EXTENDING RADIALLY FROM THE OPPOSITE SIDE THEREOF, A FIRST MEANS ON SAID TURNTABLE FOR CLAMPING ONE END OF THE BLADE AND HAVING A CLAMPING SURFACE EXTENDING SUBSTANTIALLY FROM SAID SHOULDER TO SAID ONE SIDE OF SAID RIM, A SECOND MEANS ON SAID TURNTABLE FOR CLAMPING THE OTHER END OF THE BLADE AND HAVING A CLAMPING SURFACE EXTENDING SUBSTANTIALLY FROM SAID SHOULDER TO SAID ONE SIDE OF THE BLADE WITH THE BLADE WRAPPED AROUND SAID RIM, SAID ONE LONGITUDINAL EDGE OF THE BLADE EXTENDING A RELATIVELY SHORT DISTANCE BEYOND SAID ONE SIDE OF SAID RIM AND THE OPPOSITE LONGITUDINAL EDGE OF THE BLADE BEARING ON SAID SHOULDER, MEANS FOR MOVING SAID FIRST AND SECOND CLAMPING MEANS RELATIVE TO EACH OTHER TO APPLY TENSION ON THE BLADE IN A DIRECTION TO TIGHTEN IT AGAINST SAID RIM, AND A GRINDING WHEEL ADAPTED TO ACT ON SAID ONE LONGITUDINAL EDGE OF THE BLADE.
Claim 2
Dependent Claim
201 words
A MACHINE FOR CONTINUOUSLY GRINDING ONE LONGITUDINAL EDGE OF AN ELONGATED FLEXIBLE BLADE HAVING A PAIR OF OPPOSED LONGITUDINAL EDGES AND ENDS COMPRISING A SUPPORT, A TURNTABLE MOUNTED ON SAID SUPPORT, MEANS FOR ROTATING SAID TURNTABLE ABOUT AN AXIS AND HAVING A CIRCULAR RIM TERMINATING AT ONE SIDE AND A CIRCUMFERENTIAL SHOULDER EXTENDING RADIALLY FROM THE OPPOSITE SIDE THEREOF, A FIRST MEANS ON SAID TURNTABLE FOR CLAMPING ONE END OF THE BLADE AND HAVING A CLAMPING SURFACE EXTENDING SUBSTANTIALLY FROM SAID SHOULDER TO SAID ONE SIDE OF SAID RIM, A SECOND MEANS ON SAID TURNTABLE FOR CLAMPING THE OTHER END OF THE BLADE AND HAVING A CLAMPING SURFACE EXTENDING SUBSTANTIALLY FROM SAID SHOULDER TO SAID ONE SIDE OF THE BLADE WITH THE BLADE WRAPPED AROUND SAID RIM, SAID ONE LONGITUDINAL EDGE OF THE BLADE EXTENDING A RELATIVELY SHORT DISTANCE BEYOND SAID ONE SIDE OF SAID RIM AND THE OPPOSITE LONGITUDINAL EDGE OF THE BLADE BEARING ON SAID SHOULDER, MEANS FOR MOVING SAID FIRST AND SECOND CLAMPING MEANS RELATIVE TO EACH OTHER TO APPLY TENSION ON THE BLADE IN A DIRECTION TO TIGHTEN IT AGAINST SAID RIM, AND A GRINDING WHEEL ADAPTED TO ACT ON SAID ONE LONGITUDINAL EDGE OF THE BLADE.
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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |