Patent ID: 7361238

Claim:
A method for annealing laminations in an annealing furnace, comprising the steps of: providing a heating section followed by a cooling section, purge vestibule, and oxidation section; providing a conveyor for conveying trays containing laminations to be annealed and oxidized, said conveyor extending from said heating section through said cooling section, purge vestibule, and oxidation section; after heating the laminations, cooling them to a temperature range between 600 and 1000° F. in said cooling section, and outputting the cooled laminations to the oxidation section; and in said oxidation section, having a plurality of atmosphere injection tubes with each tube having a plurality of atmosphere injection jets closely positioned to said trays to disrupt the boundary layer of stagnant atmosphere at said laminations, atmosphere of said atmosphere jets being provided from an output of a fan, an input of said fan receiving the atmosphere extracted from said oxidation section.