US3082579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sharpening double-edged razor blades by hand
Assignee: Individual
•
Filing: 1961-05-31
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Granted: 1963-03-26
•
Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Topfer Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/06; B24D15/08; B24D15/085; B24D15/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A DEVICE FOR SHARPENING DOUBLE-EDGED RAZOR BLADES COMPRISING A HOUSING, A PAIR OF RAILS SECURED IN SAID HOUSING AT TWO OPPOSITE SIDES THEREOF, A PAIR OF COUNTER-ROTATING GRINDING ROLLERS CONSISTING OF AN ELASTIC MATERIAL AND CONTACTING EACH OTHER ALONG THEIR GENERATRICES, SAID GRINDING ROLLERS BEING ARRANGED BETWEEN AND AT RIGHT ANGLES TO SAID RAILS, AN ADJUSTABLE CLAMPING DEVICE ACCOMMODATED WITHIN SAID HOUSING ALONGSIDE ONE OF SAID GRINDING ROLLERS AND ARRANGED TO PRODUCE FLATTENED SURFACES ON AND BETWEEN SAID GRINDING ROLLERS, AND A DETACHABLE HOLDER FOR SUSPENDING A RAZOR BLADE THEREIN, SAID HOLDER BEING STABLY SECURED ON SAID RAILS, ONE CUTTING EDGE OF THE SUSPENDED RAZOR BLADE BEING ENGAGED BETWEEN THE FLATTENED SURFACES OF SAID GRINDING ROLLERS AND EXTENDING ALMOST DOWN TO AN IMAGINARY LONGITUDINAL CENTRAL LINE BETWEEN SAID FLATTENED SURFACES, SAID ADJUSTABLE CLAMPING DEVICE COMPRISING A CONTROL MEANS HAVING A CAM, A PRESSURE MEMBER, AND PRESSURE SPRINGS WHICH ACT ON THE PAIR OF GRINDING ROLLERS THROUGH THE INTERMEDIARY OF THE PRESSURE MEMBER, THE PRESSURE SPRINGS BEING ARRANGED TO COMPRESS THE GRINDING ROLLERS AT THE OPPOSED SUPERFICIES THEREOF ON OPERATION OF THE CONTROL MEANS TO FORM THE FLATTENED SURFACES ON THE GRINDING ROLLERS AND THE CAM OF THE CONTROL MEANS BEING ARRANGED TO OPPOSE AND REDUCE THE EFFECTIVE TENSION OF THE PRESSURE SPRINGS.
Claim 2
Independent Claim
212 words
A DEVICE FOR SHARPENING DOUBLE-EDGED RAZOR BLADES COMPRISING A HOUSING, A PAIR OF RAILS SECURED IN SAID HOUSING AT TWO OPPOSITE SIDES THEREOF, A PAIR OF COUNTER-ROTATING GRINDING ROLLERS CONSISTING OF AN ELASTIC MATERIAL AND CONTACTING EACH OTHER ALONG THEIR GENERATRICES, SAID GRINDING ROLLERS BEING ARRANGED BETWEEN AND AT RIGHT ANGLES TO SAID RAILS, AN ADJUSTABLE CLAMPING DEVICE ACCOMMODATED WITHIN SAID HOUSING ALONGSIDE ONE OF SAID GRINDING ROLLERS AND ARRANGED TO PRODUCE FLATTENED SURFACES ON AND BETWEEN SAID GRINDING ROLLERS, AND A DETACHABLE HOLDER FOR SUSPENDING A RAZOR BLADE THEREIN, SAID HOLDER BEING STABLY SECURED ON SAID RAILS, ONE CUTTING EDGE OF THE SUSPENDED RAZOR BLADE BEING ENGAGED BETWEEN THE FLATTENED SURFACES OF SAID GRINDING ROLLERS AND EXTENDING ALMOST DOWN TO AN IMAGINARY LONGITUDINAL CENTRAL LINE BETWEEN SAID FLATTENED SURFACES, SAID ADJUSTABLE CLAMPING DEVICE COMPRISING A CONTROL MEANS HAVING A CAM, A PRESSURE MEMBER, AND PRESSURE SPRINGS WHICH ACT ON THE PAIR OF GRINDING ROLLERS THROUGH THE INTERMEDIARY OF THE PRESSURE MEMBER, THE PRESSURE SPRINGS BEING ARRANGED TO COMPRESS THE GRINDING ROLLERS AT THE OPPOSED SUPERFICIES THEREOF ON OPERATION OF THE CONTROL MEANS TO FORM THE FLATTENED SURFACES ON THE GRINDING ROLLERS AND THE CAM OF THE CONTROL MEANS BEING ARRANGED TO OPPOSE AND REDUCE THE EFFECTIVE TENSION OF THE PRESSURE SPRINGS.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |