Patent US3758381A successfully refreshed from Google Patents.
US3758381A
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US
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Rmaking machine single endless strand mounted in self centering fashion in a series of parallel convolutions as a fibrous web supporting surface in a pape
Assignee: Appleton Mills
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Filing: 1972-03-29
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Granted: 1973-09-11
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Expires: 1992-03-29
Abstract
Abstract A porous, moving, supporting structure for a fluid impregnated web or sheet, having particular use as a supporting structure for a paper web in a paper- making machine. The web supporting structure is composed of a series of adjacent machine direction convolutions of a single strand mounted to travel in an endless path over a roll assembly.To prevent lateral displacement of the strand in the direction of the roll axes, the strand is wound in both left and right helices on the roll assembly. The counter-displacement tendencies of the merged left and right hand helices prevent the inherent tendency of the strand to drift laterally as it moves through its path of travel.
Inventors
- 👤 D Knoke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:24
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0081; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10S162/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |