US3190793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning paper-making machine felts
Assignee: O DORRIES AG
•
Filing: 1961-08-30
•
Granted: 1965-06-22
•
Expires: 1981-08-30
Abstract
No abstract record available.
Inventors
- 👤 Starke Otto Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
APPARATUS FOR CLEANING PAPERMAKING MACHINE FELTS COMPRISING ROTATABLE ROLLER MEANS HAVING AN APERTURED CYLINDRICAL WALL, HOUSING MEANS NON-ROTATABLY MOUNTED WITHIN SAID ROLLER MEANS, MEANS DEFINING A PRESSURE CHAMBER AND MEANS DEFINING A SUCTION CHAMBER WITHIN SAID HOUSING MEANS AND BOTH OPENING TO THE SURFACE OF SAID CYLINDRICAL WALL, AN INLET FOR THE SUPPLY OF CLEANING LIQUID TO SAID PRESSURE CHAMBER, A HIGH FREQUENCY OSCILLATION GENERATOR MOUNTED IN SAID PRESSURE CHAMBER, AND A SUCTION CONNECTION COMMUNICATING WITH SAID SUCTION CHAMBER, THE ARRANGEMENT BEING SUCH THAT, DURING USE OF THE APPARATUS, A FELT TO BE CLEANED IS PASSED PARTLY AROUND THE ROLLER MEANS SO AS AT LEAST TO CONTACT THOSE PORTIONS OF SAID CYLINDRICAL WALL AT WHICH ARE LOCATED THE PRESSURE AND SUCTION CHAMBERS.
Claim 2
Dependent Claim
122 words
APPARATUS FOR CLEANING PAPERMAKING MACHINE FELTS COMPRISING ROTATABLE ROLLER MEANS HAVING AN APERTURED CYLINDRICAL WALL, HOUSING MEANS NON-ROTATABLY MOUNTED WITHIN SAID ROLLER MEANS, MEANS DEFINING A PRESSURE CHAMBER AND MEANS DEFINING A SUCTION CHAMBER WITHIN SAID HOUSING MEANS AND BOTH OPENING TO THE SURFACE OF SAID CYLINDRICAL WALL, AN INLET FOR THE SUPPLY OF CLEANING LIQUID TO SAID PRESSURE CHAMBER, A HIGH FREQUENCY OSCILLATION GENERATOR MOUNTED IN SAID PRESSURE CHAMBER, AND A SUCTION CONNECTION COMMUNICATING WITH SAID SUCTION CHAMBER, THE ARRANGEMENT BEING SUCH THAT, DURING USE OF THE APPARATUS, A FELT TO BE CLEANED IS PASSED PARTLY AROUND THE ROLLER MEANS SO AS AT LEAST TO CONTACT THOSE PORTIONS OF SAID CYLINDRICAL WALL AT WHICH ARE LOCATED THE PRESSURE AND SUCTION CHAMBERS.
References Cited (Backward Citations)
US1039067A
Cited
US1550993A
Cited
US1805780A
Cited
US1840102A
Cited
US1949998A
Cited
US2173317A
Cited
US2352991A
Cited
US2618807A
Cited
US2802758A
Cited
US2881463A
Cited
US2992142A
Cited
US3089790A
Cited
US3037557A
Cited
US3100928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |