US3781968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing steel sheets with layers of protective metal
Assignee: JFE Engineering Corp
•
Filing: 1972-06-02
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Granted: 1974-01-01
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Expires: 1992-06-02
Abstract
Abstract In a method of manufacturing a steel sheet coated with a layer of protective metal wherein a powder of the metal is coated on the surface of the steel sheet and the coated steel sheet is dried and then rolled by means of a rolling mill to form a layer of the protective metal bonded to the surface of the steel sheet, a small quantity of atomized oil is electrostatically applied onto the surfaces of the rolls of the rolling mill and the applied oil is treated with equalizing rolls to form thin oil films of uniform thickness on the surfaces of the rolls whereby to prevent the powder of metal from adhering to the surfaces of the rolls.
Inventors
- 👤 H Yamagishi
- 👤 F Yokoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:03
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/02; C23C24/06; B; B21; B21B; B21B27/00; B21B27/06; B21B27/10; B22; B22F; B22F3/00; B22F3/004; B22F3/18; B22F7/00; B22F7/02; B22F7/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
The method according to claim 1 wherein said metal is aluminum.
Claim 2
Dependent Claim
28 words
The method according to claim 1 wherein the quantity per unit area of said oil applied onto the surfaces of said rolls ranges from 5 to 50 mg/m2.
Claim 3
Dependent Claim
26 words
The method according to claim 1 wherein said oil is selected from the group consisting of natural oils, synthetic oils and an aqueous emulsion of oil.
References Cited (Backward Citations)
US2187348A
Cited
US2190237A
Cited
US2290734A
Cited
US2815567A
Cited
US3661612A
Cited
US3648497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |