Patent US3693393A successfully refreshed from Google Patents.
US3693393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling of metal ingots into bands
Assignee: Fried Krupp AG Hoesch Krupp
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Filing: 1970-06-25
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Granted: 1972-09-26
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Expires: 1990-06-25
Abstract
Abstract In a process for the continuous or semi-continuous hot rolling of metal ingots into bands with a high specific band weight, especially 30-40 kg per mm of band width, the material is heated, descaled, prerolled and reduced in thickness during the final rolling under tension in the longitudinal direction. During prerolling and/or intermediate rolling, the ingot is reduced in thickness under compressive stresses in the longitudinal direction. The pre-stage and/or the intermediate stage of the rolling mill are provided with roller controls such as to produce this longitudinal compression.
Inventors
- 👤 Wilhelm Nellen
- 👤 Theodor Sevenich
- 👤 Hans Wladika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:37
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/02; B21B1/04; B21B1/22; B21B1/24; B21B1/26; B21B1/265; B21B37/00; B21B37/48; B21B39/00; B21B39/14; B21B39/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
Process for at least semi-continuous hot rolling of metal ingots to metal bands with a high specific band weight, in which the ingots are heated, pre-rolled, and while under tension in the longitudinal direction finish-rolled to reduce their thickness, which comprises reducing the metal ingot in thickness by prerolling prior to the finish rolling while subjecting it to compressive force in the longitudinal direction.
Claim 2
Dependent Claim
64 words
Process for at least semi-continuous hot rolling of metal ingots to metal bands with a high specific band weight, in which the ingots are heated, pre-rolled, and while under tension in the longitudinal direction finish-rolled to reduce their thickness, which comprises reducing the metal ingot in thickness by prerolling prior to the finish rolling while subjecting it to compressive force in the longitudinal direction.
Claim 3
Dependent Claim
87 words
Rolling mill comprising a plurality of roll frames arranged in a line one after another, including a group of frames comprising a pre-stage and a group of frame comprising a finish stage, having between at least two successive roll frames of the pre-stage hold down means for preventing buckling of the goods, and means to drive the rolls of said successive frames at such relative speeds relative to the roll gaps as to produce a compressive force in the goods between the rolls in said two frames.
Claim 4
Dependent Claim
87 words
Rolling mill comprising a plurality of roll frames arranged in a line one after another, including a group of frames comprising a pre-stage and a group of frame comprising a finish stage, having between at least two successive roll frames of the pre-stage hold down means for preventing buckling of the goods, and means to drive the rolls of said successive frames at such relative speeds relative to the roll gaps as to produce a compressive force in the goods between the rolls in said two frames.
Claim 5
Dependent Claim
71 words
Rolling mill as claimed in claim 2, in which said hold down means includes rolling tables adjacent each of the roll frames beneath the path of the roll goods therebetween, a rotatable support roll between the rolling tables, and a pressure roll for engaging the roll goods from above between the frames, means mounting the pressure roll for substantially vertical movement and means to press the pressure roll against the goods.
Claim 6
Dependent Claim
30 words
Rolling mill as claimed in claim 3, in which the upper surface of the support roller is higher than the upper surface of the lower rolls of the roll frames.
Claim 7
Dependent Claim
36 words
Rolling mill as claimed in claim 3, in which said pressure roll supporting means includes a vertically movable roll holder, a potentiometer, and means carried by said roll holder for adjusting the setting of the potentiometer.
Claim 8
Dependent Claim
81 words
Rolling mill as claimed in claim 2, in which said hold down means comprises a plurality of rolls rotatably mounted between successive roll frames beneath the band of the roll goods and at least one roller frame having rollers turnably mounted and pivoted on one of said roll frames in a position to overlie the goods passing between the roll frames, and means to exert a force on said roller frame so as to force it against the goods being rolled.
References Cited (Backward Citations)
US1771688A
Cited
US3110204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |