Patent US2227535A successfully refreshed from Google Patents.
Patent US3648359A successfully refreshed from Google Patents.
US3648359A
Expired / Lapsed
US
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Working of continuously cast metal strand
Assignee: Jones and Laughlin Steel Inc
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Filing: 1969-12-30
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Granted: 1972-03-14
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Expires: 1989-12-30
Abstract
Abstract Continuously cast metal strand with a porous center portion is sheared into lengths by working the solidified skin so as to form a solidified zone extending across the strand and severing it in this zone. Lengths so sheared from multiple strands are passed sequentially through a single reheating furnace and a single rolling mill.
Inventors
- 👤 William E Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:40
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/46; B21B1/466; B22; B22D; B22D11/00; B22D11/12; B22D11/126; B22D11/128; B22D11/1282; C; C21; C21D; C21D9/00; C21D9/0081; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
In the process of continuously casting a metal billet strand which is withdrawn from the casting mold with a solidified skin portion and a porous center portion and is thereafter rolled, the improvement comprising working its solidified skin portion in a localized area from at least one side while its center portion is still porous so as to close up its porous center portion therebeneath and form a solidified zone extending throughout the strand cross section, severing the strand in that zone into billets each having the same cross section as the strand and lengths many times either cross sectiOn dimension, and rolling those billets in the direction of the strand axis.
Claim 2
Dependent Claim
112 words
In the process of continuously casting a metal billet strand which is withdrawn from the casting mold with a solidified skin portion and a porous center portion and is thereafter rolled, the improvement comprising working its solidified skin portion in a localized area from at least one side while its center portion is still porous so as to close up its porous center portion therebeneath and form a solidified zone extending throughout the strand cross section, severing the strand in that zone into billets each having the same cross section as the strand and lengths many times either cross sectiOn dimension, and rolling those billets in the direction of the strand axis.
Claim 3
Dependent Claim
21 words
The process of claim 1 in which the rolling of the billets is carried out while they retain their casting heat.
Claim 4
Dependent Claim
29 words
The process of claim 1 in which the strand is successively worked in localized areas spaced from each other along its length and is severed therein into successive billets.
Claim 5
Dependent Claim
18 words
The process of claim 1 in which the skin portion is worked from opposite sides of the strand.
Claim 6
Dependent Claim
39 words
The process of claim 1 in which the solidified skin is worked by indenting it on one side until it is brought into contact with the solidified skin on the opposite side and seals off the porous center portion.
Claim 7
Dependent Claim
23 words
The process of claim 1 in which the severed billet has a porous center portion extending over the greater part of its length.
Claim 8
Dependent Claim
35 words
The process of claim 1 in which the strand is continuously cast so that porous center portions persist in the severed billets and the rolling of the billets is adjusted to close up those portions.
Claim 9
Dependent Claim
18 words
The process of claim 1 including the step of supplying supplemental heat to the billets before rolling them.
Claim 10
Dependent Claim
131 words
In the process of continuously casting multiple parallel separate strands of metal billets each of which is withdrawn from the casting mold with a solidified skin portion and a porous center portion and is thereafter rolled, the improvement comprising working the solidified skin portion of each strand in a localized area from at least one side while its center portion is still porous so as to close up its porous portion therebeneath and form a solidified zone extending throughout the strand cross section, severing each strand in that zone into billets each having the same cross section as the strand and lengths many times either cross section dimension, and rolling the billets from the multiple strands successively through the same rolling mill in the direction of the axes of the strands.
Claim 11
Dependent Claim
131 words
In the process of continuously casting multiple parallel separate strands of metal billets each of which is withdrawn from the casting mold with a solidified skin portion and a porous center portion and is thereafter rolled, the improvement comprising working the solidified skin portion of each strand in a localized area from at least one side while its center portion is still porous so as to close up its porous portion therebeneath and form a solidified zone extending throughout the strand cross section, severing each strand in that zone into billets each having the same cross section as the strand and lengths many times either cross section dimension, and rolling the billets from the multiple strands successively through the same rolling mill in the direction of the axes of the strands.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |