US3323739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper mill knife and mounting therefor
Assignee: Individual
•
Filing: 1965-06-08
•
Granted: 1967-06-06
•
Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Deming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:22
CPC Classifications
B; B65; B65H; B65H19/00; B65H19/22; B65H19/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PAPER MILL KNIFE COMPRISING A CYLINDRICAL CORE ADAPTED TO RECEIVE A PAPER WINDING HAVING A CIRCUMFERENCE, A LENGTH AND A RADIUS OF CURVATURE; A KNIFE BLADE HAVING A LENGTH, A RADIUS OF CURVATURE PERPENDICULAR TO SAID LENGTH, TWO FORWARDLY CONVERGING FRONT EDGES WHICH DESCRIBE INTERSECTING REVERSED CYLINDRICAL SPIRALS FORMING AN APEX MIDWAY OF SAID LENGTH, AND A CENTRAL SEMICIRCULAR CROSS-SECTION, SAID SEMICIRCULAR CROSS-SECTION BEING COAXIAL WITH AND CLOSELY FITTING SAID CIRCUMFERENCE OF SAID CORE WHEN SAID BLADE IS PLACED AROUND SAID CORE; MEANS MOUNTING SAID CORE FOR ROTATABLE MOVEMENT; AND MEANS PIVOTALLY MOUNTING SAID BLADE ADJACENT SAID CORE FOR SELECTIVELY PLACING SAID BLADE COAXIAL WITH SAID CORE.
Claim 2
Dependent Claim
108 words
A PAPER MILL KNIFE COMPRISING A CYLINDRICAL CORE ADAPTED TO RECEIVE A PAPER WINDING HAVING A CIRCUMFERENCE, A LENGTH AND A RADIUS OF CURVATURE; A KNIFE BLADE HAVING A LENGTH, A RADIUS OF CURVATURE PERPENDICULAR TO SAID LENGTH, TWO FORWARDLY CONVERGING FRONT EDGES WHICH DESCRIBE INTERSECTING REVERSED CYLINDRICAL SPIRALS FORMING AN APEX MIDWAY OF SAID LENGTH, AND A CENTRAL SEMICIRCULAR CROSS-SECTION, SAID SEMICIRCULAR CROSS-SECTION BEING COAXIAL WITH AND CLOSELY FITTING SAID CIRCUMFERENCE OF SAID CORE WHEN SAID BLADE IS PLACED AROUND SAID CORE; MEANS MOUNTING SAID CORE FOR ROTATABLE MOVEMENT; AND MEANS PIVOTALLY MOUNTING SAID BLADE ADJACENT SAID CORE FOR SELECTIVELY PLACING SAID BLADE COAXIAL WITH SAID CORE.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |