Abstract: In the heat treatment of heat treatable material in an industrial furnace, in particular for the annealing of annealable material such as, for example, aluminum strip wound into a coil (1), by means of blowing of the annealable material with hot gas jets (8) issuing from nozzles (7), in order to insure a very good and uniform heat transfer from the hot gas stream to the material and a completely uniform temperature distribution in the coil (1), and also the rapid heating thereof, without any need to fear locally partial overtemperatures in the coil, it is proposed in accordance with the invention to move the annealable material such as, for example, the coil (1), and the hot gas jets (8) relative to one another, for example by means of the fact that the coil (1) and/or the hot gas nozzles (7) are rotated about the coil axis, so that the blowing impingement points of the hot gas jets (8) move on the blown surface of the annealable material and all desired portions there can be swept in controlled fashion.

Abstract: A crosshead shoe for the sliding transport on rails of a material to be annealed has, for the lateral guiding on the rails, an approximately U-shaped cross section with downwardly projecting legs. Special glide elements are provided on the side of the glide shoe which faces the glide plane, and/or the rail, which glide elements are designed so that as little wear and friction as possible occur during the movement of the crosshead shoes. The glide elements have glide surfaces for this purpose, the side surfaces of which glide surfaces are rounded and/or downwardly inclined, and/or the peripheral edges of which are associated with one another in obtuse angles or have a shape which is at least partially circular. These conditions exist, for example, in glide elements with polygonal or circular surfaces, which can be arranged in one or several rows or in a honeycomb pattern.