Continuous furnace
Assignee"OFU" Ofenbau-Union GmbH
InventorRobert Spessert
Life of this patent
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Abstract
A continuous furnace for metal slabs in which the side walls of the furnace each include a lower portion extending upwardly from the floor of the furnace and an upper portion extending from the lower portion to the roof of the furnace. The upper and lower portions are shaped so that tangents to the inner surface of the upper portion form an angle of at least 90.degree. with respect to the upper planar surface of the slab while tangents to the inner surface of the lower portion form an obtuse angle with such planar surface to minimize the reflection of heat to the slab to the side walls.
Claims8
A continuous furnace for metal elongated objects arranged in transversely extending disposition for travel along a plane through the furnace, said furnace comprising a chamber including inner side walls and a heating surface arranged in spaced relation with respect to the transport plane of the objects for directing heat radiation theretowards to heat said objects, said side walls including a first region closer to the transport plane concave inwards in shape and forming an angle with said transport plane or more than 90.degree. as measured from the transport plane to said first region, said side walls including a second region further from the transport plane shaped to form an angle with said transport plane of at least 90.degree. as measured from the transport plane to said second region, said side walls receiving heat radiation from said heating surface and due to the shape of said side walls the reflection of heat to said objects at the ends thereof proximate the side walls is minimized.
Dependencies are inferred from the claim text.