US3564882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mill control system
Assignee: Allegheny Ludlum Corp
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Filing: 1968-04-22
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Granted: 1971-02-23
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Expires: 1988-04-22
Abstract
Abstract DESCRIBED IS A ROLLING MILL CONTROL SYSTEM FOR TANDEM ROLLING MILLS BASED ON THE CONSTANT VOLUME PRINCIPLE AND WHEREIN ANTICIPATED OR PREDICTED EXIT GAGE IS CALCULATED FROM MEASURED ENTRY GAGE AND THE LENGTH OF MATERIAL ENTERING AND LEAVING THE MILL. THIS PREDICTED EXIT GAGE IS COMPARED WITH DESIRED EXIT GAGE AS DETERMINED BY THE MILL OPERATOR TO GENERATE AN ERROR CORRECTION SIGNAL TO THE MILL SCREWDOWNS IF THE PREDICTED AND DESIRED GAGES ARE NOT THE SAME.
Inventors
- 👤 Samuel S Harbaugh
- 👤 Joseph J Kasecky
- 👤 James B Murtland Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:27
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/16; B21B37/165
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |