US3752459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous annealing facilities for drawing steel strip
Assignee: JFE Engineering Corp
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Filing: 1970-12-16
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Granted: 1973-08-14
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Expires: 1990-12-16
Abstract
Abstract A continuous annealing facilities substantially comprising the following devices: HEATING AND SOAKING ZONES THAT THE TEMPERATURE OF PASSING STRIP IS WITHIN THE RANGE OF 710* TO 800* C, a rapid cooling chamber that the cooling rate of said strip is more than 50* C per second from 300* to 500* C a shelf treating zone that said strip is possible to maintain at the temperature of said 300* to 500* C for at least 10 seconds, and A COOLING ZONE THAT THE STRIP IS COOLED TO ROOM TEMPERATURE.
Inventors
- 👤 Y Kawazoko
- 👤 H Kuroda
- 👤 K Hirogami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:36
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0473; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A continuous annealing apparatus comprising a chamber having a heating zone, a soaking zone, a rapid cooling chamber, a shelf treating zone and a cooling zone, and means for moving strip steel from said heating zone to said soaking zone to said rapid cooling chamber to said shelf treating zone and then to said cooling zone for obtaining steel sheet of good drawability, means sealing said rapid cooling chamber from said zones, but permitting the passage of said steel strip, means for introducing a coolant to said rapid cooling chamber, gas absorbing devices connected to said sealing means and coolant recovery means connected to said rapid cooling chamber.
Claim 2
Dependent Claim
108 words
A continuous annealing apparatus comprising a chamber having a heating zone, a soaking zone, a rapid cooling chamber, a shelf treating zone and a cooling zone, and means for moving strip steel from said heating zone to said soaking zone to said rapid cooling chamber to said shelf treating zone and then to said cooling zone for obtaining steel sheet of good drawability, means sealing said rapid cooling chamber from said zones, but permitting the passage of said steel strip, means for introducing a coolant to said rapid cooling chamber, gas absorbing devices connected to said sealing means and coolant recovery means connected to said rapid cooling chamber.
References Cited (Backward Citations)
US2205915A
Cited
US2585277A
Cited
US2768916A
Cited
US2797177A
Cited
US2892744A
Cited
US2890878A
Cited
US2991989A
Cited
US3194545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |