US3446702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear insert for paper machine drainage foil
Assignee: Jwi Ltd
•
Filing: 1966-01-24
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Granted: 1969-05-27
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 John G Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:40
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/483
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
AN ELONGATED DRAINAGE FOIL POSITIONABLE TRANSVERSELY UNDER A MOVING DRAINAGE WIRE OF A WEB FORMING MACHINE, SAID FOUL INCLUDING A FRONT LAND PORTION HAVING A LEADING EDGE AND AN UPPER SURFACE AND ALSO INCLUDING A REAR SUCTION PORTION HAVING AN UPPER SURFACE SLOPED DOWNWARDLY FROM THE UPPER SURFACEOF SAID LAND PORTION, SAID LAND PORTION BEING PROVIDED IN ITS UPPER SURFACE WITH AN UNDERCUT GROOVE EXTENDING LINGITUDINALLY OF THE FOIL, SAID GROOVE HAVING A FRONT UPPER EDGE PARALLEL TO AND SPACED FROM THE LEADING EDGE OF SAID LAND PORTION IN THE DIRECTION OF WIRE MOVEMENT, AND A WIRE ENGAGING INSERT MOUNTED IN SAID GROOVE AND HAVING A CROSS-SECTION CORRESPONDING TO THAT OF THE GROOVE, SAID INSERT HAVING A WIRE ENGAGING UPPER SURFACE COPLANAR WITH THE UPPER SURFACE OF SIAD LAND PORTION AND AT LEAST THE UPPER SURFACE PORTION OF SAID INSERT BEING COMPOSED OF ABRASION RESISTANT MATERIAL.
Claim 2
Dependent Claim
146 words
AN ELONGATED DRAINAGE FOIL POSITIONABLE TRANSVERSELY UNDER A MOVING DRAINAGE WIRE OF A WEB FORMING MACHINE, SAID FOUL INCLUDING A FRONT LAND PORTION HAVING A LEADING EDGE AND AN UPPER SURFACE AND ALSO INCLUDING A REAR SUCTION PORTION HAVING AN UPPER SURFACE SLOPED DOWNWARDLY FROM THE UPPER SURFACEOF SAID LAND PORTION, SAID LAND PORTION BEING PROVIDED IN ITS UPPER SURFACE WITH AN UNDERCUT GROOVE EXTENDING LINGITUDINALLY OF THE FOIL, SAID GROOVE HAVING A FRONT UPPER EDGE PARALLEL TO AND SPACED FROM THE LEADING EDGE OF SAID LAND PORTION IN THE DIRECTION OF WIRE MOVEMENT, AND A WIRE ENGAGING INSERT MOUNTED IN SAID GROOVE AND HAVING A CROSS-SECTION CORRESPONDING TO THAT OF THE GROOVE, SAID INSERT HAVING A WIRE ENGAGING UPPER SURFACE COPLANAR WITH THE UPPER SURFACE OF SIAD LAND PORTION AND AT LEAST THE UPPER SURFACE PORTION OF SAID INSERT BEING COMPOSED OF ABRASION RESISTANT MATERIAL.
References Cited (Backward Citations)
US3351524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |