US3261468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen cleaning device
Assignee: Bird Machine Co Inc
•
Filing: 1963-05-17
•
Granted: 1966-07-19
•
Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 George M Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/023; D21D5/026; B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/115; B01D29/117; B01D29/118; B01D29/13; B01D29/15; B01D29/17; B01D29/23; B01D29/25; B01D29/50; B01D29/52; B01D29/54; B01D29/76; B01D29/86; D21D5/06; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A SCEENING DEVICE FOR FIBROUS PULP HAVING A GENERALLY CYLINDRICAL SCREEN, AND MEANS FOR CONDUCTING A STREAM OF PULP ACROSS A FACE OF SAID SCREEN, AN IMPROVED SCREEN CLEANING DEVICE COMPRISING AT LEAST ONE ELONGATED FOIL, MEANS FOR SUPPORTING SAID FOIL ADJACENT ONE END ONLY FOR MOVEMENT IN A CIRCULAR PATH ABOUT THE AXIS OF THE SCREEN AND ACROSS A FACE THEREOF AND SPACED FROM SAID FRAME, THE CLEARANCE BETWEEN THE FOIL AND THE ADJACENT SCREEN FACE VARYING FROM THE SUPPORT END TO THE FREE END OF THE FOIL AT REST, THE EXTENT OF SAID VARIATION AT REST BEING SUBSTANTIALLY EQUAL TO THE EXTENT OF BENDING OF SAID FOIL UNDER THE INFLUENCE OF CENTRIFUGAL FORCE UNDER OPERATING CONDITIONS, SO THAT UNDER OPER-
Claim 2
Dependent Claim
123 words
IN A SCEENING DEVICE FOR FIBROUS PULP HAVING A GENERALLY CYLINDRICAL SCREEN, AND MEANS FOR CONDUCTING A STREAM OF PULP ACROSS A FACE OF SAID SCREEN, AN IMPROVED SCREEN CLEANING DEVICE COMPRISING AT LEAST ONE ELONGATED FOIL, MEANS FOR SUPPORTING SAID FOIL ADJACENT ONE END ONLY FOR MOVEMENT IN A CIRCULAR PATH ABOUT THE AXIS OF THE SCREEN AND ACROSS A FACE THEREOF AND SPACED FROM SAID FRAME, THE CLEARANCE BETWEEN THE FOIL AND THE ADJACENT SCREEN FACE VARYING FROM THE SUPPORT END TO THE FREE END OF THE FOIL AT REST, THE EXTENT OF SAID VARIATION AT REST BEING SUBSTANTIALLY EQUAL TO THE EXTENT OF BENDING OF SAID FOIL UNDER THE INFLUENCE OF CENTRIFUGAL FORCE UNDER OPERATING CONDITIONS, SO THAT UNDER OPER-
References Cited (Backward Citations)
DE24801C
Cited
US439700A
Cited
US641773A
Cited
AT28226B
Cited
US2247605A
Cited
US2204349A
Cited
US2868500A
Cited
DE822325C
Cited
US2796809A
Cited
GB773742A
Cited
US2975899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |