US3190790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preparing continuous webs of fibrous material
Assignee: Feldmuehle AG
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Filing: 1962-04-24
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Granted: 1965-06-22
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Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Ploetz Theodor
- 👤 Mettmann Kreis
- 👤 Wimmer Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/02; D21F11/00; D21F11/02; D21F11/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A METHOD OF PREPARING A CONTINUOUS WEB OF FIBROUS MATERIAL WHICH COMPRISES: (A) MOVING A CONTINUOUS SCREEN IN AN UPWARD DIRECTION, SAID SCREEN HAVING TWO FACES; (B) SEPARATELY GUIDING A PLURALITY OF CONTINUOUS STREAMS OF SUSPENSIONS OF FIBROUS PARTICLES IN A LIQUID IN RESPECTIVE LINEAR PATHS INTO SIMULTANEOUS CONTACT WITH RESPECT PORTIONS OF ONE FACE OF SAID SCREEN, SAID PORTIONS BEING OFFSET IN SAID UPWARD DIRECTION, EACH PATH EXTENDING IN A PREDETERMINED DIRECTION TRANSVERSE OF THE UPWARD DIRECTION OF MOVEMENT OF THE ASSOCIATED SCREEN PORTION; (C) SUBSTANTIALLY RETAINING SAID PARTICLES OF EACH STREAM ON THE RESPECTIVE FACE PORTIONS; (D) PASSING AT LEAST A PORTION OF THE LIQUID IN SAID STREAM THROUGH THE ASSOCIATED SCREEN PORTION FROM SAID ONE FACE TO A CORRESPONDING PORTION OF THE OTHER FACE OF SAID SCREEN; AND (E) SEPARATELY GUIDING THE PASSED LIQUID OF EACH STREAM AWAY FROM SAID PORTION OF SAID OTHER FACE IN A LINEAR PATH EXTENDING IN SAID DIRECTION.
Claim 2
Independent Claim
156 words
A METHOD OF PREPARING A CONTINUOUS WEB OF FIBROUS MATERIAL WHICH COMPRISES: (A) MOVING A CONTINUOUS SCREEN IN AN UPWARD DIRECTION, SAID SCREEN HAVING TWO FACES; (B) SEPARATELY GUIDING A PLURALITY OF CONTINUOUS STREAMS OF SUSPENSIONS OF FIBROUS PARTICLES IN A LIQUID IN RESPECTIVE LINEAR PATHS INTO SIMULTANEOUS CONTACT WITH RESPECT PORTIONS OF ONE FACE OF SAID SCREEN, SAID PORTIONS BEING OFFSET IN SAID UPWARD DIRECTION, EACH PATH EXTENDING IN A PREDETERMINED DIRECTION TRANSVERSE OF THE UPWARD DIRECTION OF MOVEMENT OF THE ASSOCIATED SCREEN PORTION; (C) SUBSTANTIALLY RETAINING SAID PARTICLES OF EACH STREAM ON THE RESPECTIVE FACE PORTIONS; (D) PASSING AT LEAST A PORTION OF THE LIQUID IN SAID STREAM THROUGH THE ASSOCIATED SCREEN PORTION FROM SAID ONE FACE TO A CORRESPONDING PORTION OF THE OTHER FACE OF SAID SCREEN; AND (E) SEPARATELY GUIDING THE PASSED LIQUID OF EACH STREAM AWAY FROM SAID PORTION OF SAID OTHER FACE IN A LINEAR PATH EXTENDING IN SAID DIRECTION.
Claim 3
Dependent Claim
138 words
IN AN APPARATUS FOR PREPARING A CONTINUOUS WEB OF FIBROUS MATERIAL, IN COMBINATION: (A) A CONTINUOUS SCREEN HAVING TWO OPPOSITE FACES; (B) DRIVE MEANS FOR MOVING SAID SCREEN IN A PATH EXTENDING IN AN UPWARD DIRECTION; (C) FIRST GUIDE MEANS FOR SEPARATELY GUIDING LIQUID FIBER SUSPENSIONS IN LINEAR STREAMS TO A FIRST FACE OF RESPECTIVE PORTIONS OF SAID SCREEN, SAID PORTIONS BEING OFFSET IN SAID UPWARD DIRECTION, AND SAID STREAMS BEING TRANSVERSE OF SAID SCREEN; (D) PRESSURE MEANS FOR PASING AT LEAST A PORTION OF THE LIQUID OF EACH STREAM THROUGH THE RESPECTIVE PORTIONS OF SAID SCREEN FROM SAID FIRST FACE TO THE SECOND FACE THEREOF; AND (E) SECOND GUIDE MEANS FOR SEPARATELY GUIDING THE PASSING LIQUID OF EACH STREAM AWAY FROM SAID SECOND FACE OF SAID SCREEN IN A LINEAR PATH SUBSTANTIALLY PARALLEL TO THE CORRESPONDING STREAM.
Claim 4
Dependent Claim
138 words
IN AN APPARATUS FOR PREPARING A CONTINUOUS WEB OF FIBROUS MATERIAL, IN COMBINATION: (A) A CONTINUOUS SCREEN HAVING TWO OPPOSITE FACES; (B) DRIVE MEANS FOR MOVING SAID SCREEN IN A PATH EXTENDING IN AN UPWARD DIRECTION; (C) FIRST GUIDE MEANS FOR SEPARATELY GUIDING LIQUID FIBER SUSPENSIONS IN LINEAR STREAMS TO A FIRST FACE OF RESPECTIVE PORTIONS OF SAID SCREEN, SAID PORTIONS BEING OFFSET IN SAID UPWARD DIRECTION, AND SAID STREAMS BEING TRANSVERSE OF SAID SCREEN; (D) PRESSURE MEANS FOR PASING AT LEAST A PORTION OF THE LIQUID OF EACH STREAM THROUGH THE RESPECTIVE PORTIONS OF SAID SCREEN FROM SAID FIRST FACE TO THE SECOND FACE THEREOF; AND (E) SECOND GUIDE MEANS FOR SEPARATELY GUIDING THE PASSING LIQUID OF EACH STREAM AWAY FROM SAID SECOND FACE OF SAID SCREEN IN A LINEAR PATH SUBSTANTIALLY PARALLEL TO THE CORRESPONDING STREAM.
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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 |