Mounting structure for paper machine drainage foils
Abstract
Abstract THIS INVENTION RELATES TO MEANS FOR AFFIXING HYDROFOIL BLADES TO PAPERMAKING MACHINES. IN ONE EMBODIMENT OF THIS INVENTION, THERE IS PROVIDED AN ELONGATED MOUNTING BAR WITH CHANNELS IN THE FRONT-FACING AND IN THE REARFACING SURFACES OF THE BAR TO WHICH A HYDROFOIL BLADE MAY BE AFFIXED, BY SLIDING INTO PLACE; THE BLADE HAVING A BASE PORTION IN WHICH THERE IS AN ELONGATED SLOG FORMING PROJECTIONS TO FIT INTO THE BAR CHANNELS WITHOUT SUBSTANTIL VERTICAL PLAY, AND A ROUTED-OUT CENTER PORTION OF SUCH DIMENSIONS THAT THE CRITICAL REGIONS OF CLOSE CONTACT BETWEEN THE BAR AND THE BLADE ARE SUBSTANTIALLY LIMITED TO THE UPPER AND LOWER SURFACES OF THE SLOTS AND THE CORRESPONDING UPPER AND LOWER SURFACES OF THE PROJECTIONS.
Inventors
- 👤 R Walser
- 👤 W Givin
Bibliographic Details
Claims Analysis
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |