US3810818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin-wire papermaking machine with suction boxes within the loop of one wire and blast boxes within the other
Assignee: Individual
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Filing: 1971-10-26
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Granted: 1974-05-14
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Expires: 1991-10-26
Abstract
Abstract A twin-wire papermaking machine which includes a dewatering and press section, the dewatering section employing suction boxes within the loop of one of the forming wires, and blast boxes within the loop of the other forming wire. The boxes have convex domes which cause the two wires to move in a serpentine configuration and are positioned to provide continuous support thereto. The dewatering section may also employ opposed foils, press cylinders, and suction cylinders located opposite to grooved cylinders.
Inventors
- 👤 H Arledter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F9/00; D21F9/003
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |