US4408561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-purpose plant for producing cold rolled steel sheet and hot-dip galvanized steel sheet
Assignee: Nippon Steel Corp
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Filing: 1981-08-24
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Granted: 1983-10-11
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Expires: 2001-08-24
Abstract
Abstract A dual-purpose production plant for cold rolled steel sheets and hot-dip galvanized steel sheets having, successively disposed in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone equipped with a controlled cooling facility, a molten galvanizing zone, an intermediate cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass for directly connecting the overaging zone and the secondary cooling zone with each other.
Inventors
- 👤 Hideo Yokoyama
- 👤 Ichiro Shimbashi
- 👤 Koichi Sakurai
- 👤 Munetsugu Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:00
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C2/40; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanizing steel sheets, comprising, successively disposed one directly after the other in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone having a controlled cooling facility therein, a hot-dip galvanizing means, an intermediate cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said overaging zone and the secondary cooling zone with each other.
Claim 2
Dependent Claim
84 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanizing steel sheets, comprising, successively disposed one directly after the other in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone having a controlled cooling facility therein, a hot-dip galvanizing means, an intermediate cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said overaging zone and the secondary cooling zone with each other.
Claim 3
Dependent Claim
21 words
The dual-purpose plant as claimed in claim 1 wherein said heating zone has a radiant tube type indirect heating means therein.
Claim 4
Dependent Claim
40 words
The dual-purpose plant as claimed in claim 1 wherein said primary cooling zone has at least one cooling means therein taken from the group consisting of a gas jet cooling type cooling means and a metal contact type cooling means.
Claim 5
Dependent Claim
48 words
The dual-purpose plant as claimed in claim 1 wherein said overaging zone has a cooling means therein which is a weak cooling gas jet cooling type cooling means or a cooling tube type cooling means, and said overaging zone further has an indirect electric resistance heating means therein.
Claim 6
Dependent Claim
22 words
The dual-purpose plant as claimed in claim 1 wherein the zones before the hot-dip galvanizing means have a reducing gas atmosphere therein.
Claim 7
Dependent Claim
31 words
The dual-purpose plant as claimed in claim 1 wherein said intermediate cooling means is a strong cooling gas jet cooler, a fog cooler, a metal contact cooler or a combination thereof.
Claim 8
Dependent Claim
38 words
The dual-purpose plant as claimed in claim 1 wherein at least one means taken from the group consisting of a zero-spangling means and an alloying means is provided between said hot-dip galvanizing means and said intermediate cooling means.
Claim 9
Dependent Claim
22 words
The dual-purpose plant as claimed in claim 1 wherein said hot-dip galvanizing means has a one-side galvanizing means as a part thereof.
Claim 10
Dependent Claim
26 words
The dual-purpose plant as claimed in claim 1 wherein said bypass means is a movable tunnel chamber connecting said overaging zone and said secondary cooling zone.
Claim 11
Dependent Claim
83 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanized steel sheets, comprising, successively disposed in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone having a controlled cooling facility therein, a hot-dip galvanizing means, an intermediate cooling means, a low-temperature overaging zone, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said overaging zone and said low-temperature overaging zone with each other.
Claim 12
Dependent Claim
83 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanized steel sheets, comprising, successively disposed in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone having a controlled cooling facility therein, a hot-dip galvanizing means, an intermediate cooling means, a low-temperature overaging zone, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said overaging zone and said low-temperature overaging zone with each other.
Claim 13
Dependent Claim
19 words
The dual-purpose plant as claimed in claim 10 wherein said heating zone has a radiant type intermediate heating means.
Claim 14
Dependent Claim
40 words
The dual-purpose plant as claimed in claim 10 wherein said primary cooling zone has at least one cooling means therein taken from the group consisting of a gas jet cooling type cooling means and a metal contact type cooling means.
Claim 15
Dependent Claim
45 words
The dual-purpose plant as claimed in claim 10 wherein said overaging zone has a cooling means therein which is a weak cooling gas jet cooling type or cooling tube type cooling means, and said overaging zone further has an indirect electric resistance heating means therein.
Claim 16
Dependent Claim
22 words
The dual-purpose plant as claimed in claim 10 wherein the zones before said hot-dip galvanizing means have a reducing gas atmosphere therein.
Claim 17
Dependent Claim
36 words
The dual-purpose plant as claimed in claim 10 wherein said intermediate cooling means is a rapid cooling means comprising a strong cooling gas jet cooler, a fog cooler, a metal contact cooler, or a combination thereof.
Claim 18
Dependent Claim
39 words
The dual-purpose plant as claimed in claim 10 wherein at least one of means taken from the group consisting of a zero-spangling means and an alloying means is provided between said hot-dip galvanizing means and said intermediate cooling means.
Claim 19
Dependent Claim
22 words
The dual-purpose plant as claimed in claim 10 wherein said hot-dip galvanizing means has a one-side galvanizing means as a part thereof.
Claim 20
Dependent Claim
26 words
The dual-purpose plant as claimed in claim 10 wherein said bypass means is a movable tunnel chamber connecting said overaging zone and said low-temperature overaging zone.
Claim 21
Dependent Claim
81 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanized steel sheets, comprising, successively disposed one directly after the other in series, a heating zone, a soaking zone, a primary cooling zone, a controlled cooling zone, a hot-dip galvanizing means, an intermediate rapid cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said controlled cooling zone and said secondary cooling zone with each other.
Claim 22
Dependent Claim
81 words
A dual-purpose production plant for producing either cold rolled steel sheets or hot-dip galvanized steel sheets, comprising, successively disposed one directly after the other in series, a heating zone, a soaking zone, a primary cooling zone, a controlled cooling zone, a hot-dip galvanizing means, an intermediate rapid cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass means for directly connecting said controlled cooling zone and said secondary cooling zone with each other.
Claim 23
Dependent Claim
20 words
The dual-purpose plant as claimed in claim 19 wherein said heating zone has a radiant type indirect heating means therein.
Claim 24
Dependent Claim
40 words
The dual-purpose plant as claimed in claim 19 wherein said primary cooling zone has at least one cooling means therein taken from the group consisting of a gas jet cooling type cooling means and a metal contact type cooling means.
Claim 25
Dependent Claim
39 words
The dual-purpose plant as claimed in claim 19 wherein said controlled cooling zone has an indirect electric resistance heating means therein and has a weak cooling gas jet cooling type cooling means or cooling tube type cooling means therein.
Claim 26
Dependent Claim
32 words
The dual-purpose plant as claimed in claim 19 wherein said intermediate rapid cooling means comprises a strong cooling gas jet cooler, a fog cooler, a metal contact cooler, or a combination thereof.
Claim 27
Dependent Claim
39 words
The dual-purpose plant as claimed in claim 19 wherein at least one means taken from the group consisting of a zero-spangling means and an alloying means is provided between said hot-dip galvanizing means and said intermediate rapid cooling means.
Claim 28
Dependent Claim
23 words
The dual-purpose plant as claimed in claim 19 wherein said hot-dip galvanizing means has a one-side hot-dip galvanizing means as a part thereof.
Claim 29
Dependent Claim
27 words
The dual-purpose plant as claimed in claim 19 wherein said bypass means is a movable tunnel chamber connecting said controlled cooling zone and said secondary cooling zone.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |