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Patent US3190793A successfully refreshed from Google Patents.
US3190793A
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Apparatus for cleaning paper-making machine felts
Assignee: O DORRIES AG
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Filing: 1961-08-30
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Granted: 1965-06-22
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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 21:55
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.
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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 |