Improvement of devices for the heat treatment of metallic strip material

摘要

Device making it possible to avoid the risk of formation of folds on a web conveyed in a furnace for cooling an installation for continuous heat treatment, especially a furnace of annealing or galvanization, to the - through which the strip is carried by the rollers, those - latter being heated by contact with the band in the width of the - ci, the risk of formation of folds which occur during a change of format of strips, when the next band is wider, that - latter then passing over the rollers having stored the impression of the thermal expansion due to the preceding tape, this device being characterized in that it positions: the heating elements (18) of the rollers (14), and below the latter, over the entire width of the furnace (10) and, on the side of the rollers opposite the heating elements, of the panels (20) are aligned so as to form with the wall of the furnace, a warm, the band (12) by continuous displacement serving as a thermal screen so that only the part of the roller is not covered by the strip is heated by said heating elements.