U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Hot rolling strip

Patent 4348882 Issued on September 14, 1982. Estimated Expiration Date: Icon_subject January 23, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3803891

Method for modernizing a hot strip mill Patent #: 4308739
Issued on: 01/05/1982
Inventor: Tippins

Inventor

Assignee

Application

No. 06/228795 filed on 01/23/1981

US Classes:

72/202, By means (other than a tool) modifying temperature of work72/229, To reverse-roll the workpiece72/234Including successively-acting roller-couples

Examiners

Primary: Husar, Francis S.
Assistant: Scherer, Jonathan L.

Attorney, Agent or Firm

International Classes

B21B 1/34 (20060101)
B21B 1/30 (20060101)

Abstract

The hot rolling of metal slabs to strip thickness and in coils having a specific weight on the order of 500 pounds per inch of width and greater comprises passing a heated metal slab through a roughing mill to form a transfer bar. The transfer bar is immediately passed between work rolls of a reversing finishing mill stand where it is coiled in a furnace downstream of the reversing finishing mill stand. Thereafter, the workpiece is passed back through the reversing finishing mill stand and coiled in a furnace on the upstream side thereof. The workpiece is again passed through the reversing finishing mill stand and into the remaining finishing stands where it is further reduced and ultimately coiled in strip form. The first two passes through the reversing finishing mill stand are carried out at speeds in excess of the third pass and unrelated to the speed cone of the remainder of the continuous finishing stands. The third pass through the reversing finishing mill stand is carried out at a rolling speed consonant with the speed cone on the subsequent passes through the continuous finishing stands.

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