Mitteleuropa, Rheinland - Der Ringofen: Abbau von Lehm, Formen und Brennen von Ziegeln. Meckenheim 1988

After collecting and extruding the clay, cutting off pieces of the clay column and drying them, the moulded bricks are set in the annular brick-kiln. In the annular brick-kiln the fire circulates once in eight days. The bricks are set in and removed after baking in two chambers, in the other twelve chambers they are heated, baked, and cooled.