US5727412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for rolling strip or plate
Assignee: SMS Siemag LLC
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Filing: 1997-01-16
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Granted: 1998-03-17
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Expires: 2017-01-16
Abstract
Abstract A method of processing large slabs into memory free strip or plate comprises the steps of: rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; in-line cooling the strip or plate to a temperature in the range 900° F. to 650° F. with the strip or plate laid out on a flat cooling conveyor; slowing the speed of the strip or plate to speeds typical of cut-to-length lines; side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; cooling the strip or plate to a temperature below 300° F.; and stacking the strip or plate.
Inventors
- 👤 William H. Tippins
- 👤 George W. Tippins
- 👤 Ronald D. Gretz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:26
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0226; B; B21; B21B; B21B1/00; B21B1/22; B21B1/30; B21B1/32; B21B1/34; B21B1/02; B21B2001/028; B21B2001/228; B21B15/00; B21B15/0007; B21B2015/0014; B21B2015/0021; B21B2015/0057; B21B2015/0071; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B45/0215; B21B45/0218; C21D8/0242
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) in-line cooling the strip or plate to a temperature in the range 900° F. to 650° F. with the strip or plate laid out on a flat cooling conveyor; c) slowing the speed of the strip or plate to speeds typical of cut-to-length lines; d) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; e) cooling the strip or plate to a temperature below 300° F.; and f) stacking the strip or plate.
Claim 2
Independent Claim
116 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) in-line cooling the strip or plate to a temperature in the range 900° F. to 650° F. with the strip or plate laid out on a flat cooling conveyor; c) slowing the speed of the strip or plate to speeds typical of cut-to-length lines; d) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; e) cooling the strip or plate to a temperature below 300° F.; and f) stacking the strip or plate.
Claim 3
Independent Claim
138 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) coiling the strip or plate at a temperature above 1340° F.; c) transferring the coiled strip or plate to an in-line cooling and cut-to-length line and uncoiling at temperatures above 1340° F. at speeds below 150 feet per minute; d) in-line cooling the strip or plate to a temperature in the range 900° F. with the strip or plate laid out on a flat cooling conveyor; e) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; f) cooling the strip or plate to a temperature below 300° F.; and g) stacking the strip or plate.
Claim 4
Independent Claim
138 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) coiling the strip or plate at a temperature above 1340° F.; c) transferring the coiled strip or plate to an in-line cooling and cut-to-length line and uncoiling at temperatures above 1340° F. at speeds below 150 feet per minute; d) in-line cooling the strip or plate to a temperature in the range 900° F. with the strip or plate laid out on a flat cooling conveyor; e) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; f) cooling the strip or plate to a temperature below 300° F.; and g) stacking the strip or plate.
Claim 5
Dependent Claim
26 words
The method according to claim 2 wherein the strip or plate is cooled prior to coiling at a temperature above 1340° F. to control scale formation.
Claim 6
Dependent Claim
23 words
The method according to claim 2 wherein the strip or plate is uncoiled into a hot flattener and flattened prior to in-line cooling.
Claim 7
Dependent Claim
22 words
The method according to claim 2 wherein after cooling below 300° F. the strip or plate is passed through a precision leveler.
Claim 8
Dependent Claim
19 words
The method according to claim 2 wherein part of the in-line cooling takes place in a water cooling bed.
Claim 9
Independent Claim
134 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) slowing the speed of the strip or plate to speeds below 150 feet per minute on a rollout table long enough to accept the entire strip or plate without being cut; c) in-line cooling the strip or plate to a temperature in the range 900° F. to 650° F. with the strip or plate laid out on a flat cooling conveyor; d) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; e) in-line cooling the strip or plate to a temperature below 300° F.; and f) stacking the strip or plate.
Claim 10
Independent Claim
134 words
A method of processing large slabs into memory free strip or plate comprising the steps of: a) rolling the large slabs into strip or plate on a rolling mill with a finishing temperature above 1340° F.; b) slowing the speed of the strip or plate to speeds below 150 feet per minute on a rollout table long enough to accept the entire strip or plate without being cut; c) in-line cooling the strip or plate to a temperature in the range 900° F. to 650° F. with the strip or plate laid out on a flat cooling conveyor; d) side trimming and/or cutting the strip or plate to lengths at temperatures above 500° F.; e) in-line cooling the strip or plate to a temperature below 300° F.; and f) stacking the strip or plate.
Claim 11
Dependent Claim
22 words
A method according to claim 7 wherein a precision leveling step follows the second in-line cooling step and precedes the stacking step.
Claim 12
Dependent Claim
19 words
A method according to claim 7 wherein an optional hot flattening step takes place before the in-line cooling step.
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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) | 2001-03-16 | 2001-09-15 | 2002-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-16 | 2005-09-15 | 2006-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-16 | 2009-09-15 | 2010-03-17 | $7700.00 | Window Closed / Lapsed |