Method of treating hollow blooms in rolling mills
Abstract
Abstract THE OPERATION OF DRIVERS FOR THE ROLLS OF A ROW OF ROLLS STANDS IN A ROLLING MILL FOR TREATMENT OF HOLLOW BLOOMS WHICH ARE MOUNTED ON MANDRELS AND ARE CONVERTED INTO TUBULAR ARTICLES DURING A PASS THROUGH THE MILL IS REGULATED IN SUCH A WAY THAT THE SPEED OF THOSE ROLLS WHICH ENGAGE THE BLOOM IS REDUCED WHEN THE LEADING END OF THE BLOOM REACHES THE ROLLS OF THE SECOND STAND AND, WHERE APPROPRIATE, AGAIN WHEN THE LEADING END OF THE BLOOM REACHES THE ROLLS OF ONE OR MORE NEXT-FOLLOWING STANDS, AND WHEN THE TRAILING END OF THE BLOOM LEAVES THE ROLLS OF THE FIRST STAND AND, WHERE APPROPRIATE, AGAIN WHEN THE TRAILING END OF THE BLOOM LEAVES THE ROLLS OF ONE OR MORE NEXT-FOLLOWING STANDS. THE REDUCTION IN THE SPEED ROLLS IS A FRACTION OF THE DIFFERENCE BETWEEN THE SPEED OF THE MANDREL PRIOR AND SUBSEQUENT TO ENTRY OF THE LEADING END OF THE BLOOM INTO A PARTICULAR STAND OR A FRACTION OF THE DIFFERENCE BETWEEN THE SPEED OF THE MANDREL PRIOR AND SUBSEQUENT TO ISSUE OF THE TRAILING END OF THE BLOOM OUT OF A PARTICULAR STAND.
Inventors
- 👤 Gerd Pfeiffer
- 👤 Horst Biller
- 👤 Claus Schrey
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |