Patent ID: 7520746
Filing Date: 2009-04-21
Classification: F27B

Abstract:
1. An electrical device steel lamination annealing furnace, comprising: a lamination high heat section followed by a lamination cooling section, a lamination purge vestibule, and a lamination oxidation section; a conveyor running from the high heat section through the cooling section, purge vestibule, and oxidation section; the conveyor carrying electrical device steel laminations being annealed which are first heated and then cooled in a plurality of trays; the cooling section having a plurality of atmosphere injection tubes each having a plurality of atmosphere injection jets, the injection jets being beneath the conveyor and spaced in close proximity to the trays on the conveyor and positioned to blow directly onto the trays from below the trays on the conveyor; the cooling section also having at least one atmosphere extraction tube lying above the conveyor and positioned to extract atmosphere in a region of the conveyor above where said injection jets are located; and a fan having an output connected to said atmosphere injection tubes and an input connected to the atmosphere extraction tubes.