Arc foil blade for machine wires of paper making machines
Abstract
Abstract An arc foil blade which is placed below a paper making machine forming wire to aid in liquid drainage is formed by a casting process and includes a body member made of plastic material, a strip of wear resistant hard casting metal alloy secured to the upper portion of the body member, and an elongated member made of antiabrasive plastic material secured to the body member in superimposed relation to the trailing edge portion thereof and presenting a substantially flat coplanar surface trailing from the strip of metal alloy. A metal insert is embedded within the body member for reinforcement. The casting alloy may contain 2 percent carbon, 35 percent chromium, 18 percent tungsten, cobalt, and traces of iron manganese, silicon, and nickel.
Inventors
- 👤 G Corbellini
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |