Description
Class B28B : SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
Subclass 1/34: Producing shaped articles from the material (using presses B28B 3/00; shaping on moving conveyers B28B 5/00; producing tubular articles B28B 21/00) by applying the material on to a core, or other moulding surface to form a layer thereon (to form a permanent layer B28B 19/00) by projecting, e.g. spraying (spraying in general B05B, B05D) by centrifugal force