Multiple stage hydraulic headbox
Abstract
Abstract THE INVENTION IS DIRECTED TO A HEADBOX FOR A PAPER MAKING MACHINE WHICH INCLUDES A PLURALITY OF STOCK RECEIVING CHAMBERS FOR DELIVERING DISCRETE STOCK STREAMS TO A CONTINUOUS MOVING FORMING SURFACE. THE CHAMBERS ARE FORMED IN A COMMON STRUCTURE AND SEPARATED ONE FROM THE OTHER BY WALL MEMBERS. EACH OF THE WALL MEMBERS HAS ENDS TERMINATING ADJACENT THE FORMING SURFACE AND THE ENDS OF A CORRESPONDING PAIR OF WALL MEMBERS CONSTITUTE THE SLICE OPENING FOR THE CORRESPONDING CHAMBER. STOCK IS DELIEVERED TO THE FORMING SURFACE FROM EACH OF THE SLICE OPENINGS IN A LAYER BY LAYER FASHION WHEREBY THE STOCK FROM A SECOND SLICE OPENING IS LAID OVER THE STOCK FROM THE FIRST SLICE OPENING, AND THE SOCK FROM THE THIRD SLICE OPENING IS LAID OVER THE STOCK FROM THE SECOND SLICE OPENING.
Inventors
- 👤 Ralph A Beck
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |