The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2016
Filed:
Dec. 02, 2013
Bilstein Gmbh & Co. KG, Hagen, DE;
Gerald Zwickel, Biedenkopf, DE;
Bilstein GmbH & Co. KG, Hagen, DE;
Abstract
A hood-type annealing furnace for the thermal treatment of cold-rolled steel strip includes a base, a protective hood which can be placed on the latter and under which a protective gas heated by a gas burner is circulated by a blower, to heat the steel strip, rolled up particularly into a coil, under the protective hood to a temperature of at least 500° C. in a protective gas atmosphere. An electric heater fed by the public power network has a heating capacity correspondingly substantially to the heating capacity of the gas burner. The protective gas can be independently heated with the electric heater, alternatively to the gas burner, with the gas burner switched off, to a temperature above the recrystallization annealing temperature. A method for operating a hood-type annealing furnace is also provided.