B28C 1/203

Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition {; Plants} specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for separating undesired admixed bodies {, e.g. stones by forcing the clay through screens or slots, e.g. having exchangeable screens or slots}