Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Reexamination Certificate
2008-05-13
2008-05-13
Kastler, Scott (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
C148S527000, C148S529000
Reexamination Certificate
active
07371296
ABSTRACT:
In a method and system for an improved annealing furnace cooling and purging, atmosphere injection jets are provided in close proximity to a bottom of a tray carrying a lamination product in a cooling section. Atmospheric extraction tubes are also provided extracting atmosphere which is delivered to a high temperature variable speed fan which then outputs at a pressure side atmosphere to tubes having the injection jets. The system may be retrofit into an existing annealing furnace already having water cooled finned tubes and a recirculation fan in the cooling section. Cooling water tubes and a recirculating fan may also be provided in a purge vestibule located after an output from the cooling section for additional cooling.
REFERENCES:
patent: 3005737 (1961-10-01), Blair et al.
patent: 5421723 (1995-06-01), Katz et al.
Effective Cooling of Components in Continuous Nitrogen-Hydrogen Atmosphere Furnace—Garg et al Industrial Heating/Feb. 1997.
Two drawings of a 1998 prior art lamination furnace for annealing laminations, Dec. 1998.
Johnston Gwynne
Kubis Michael E.
Kastler Scott
Schiff & Hardin LLP
Tempel Steel Company
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