Subclass 3/088: Drying solid materials or objects by processes involving the application of heat (in specific machines or apparatus F26B 9/00-F26B 19/00) by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried (F26B 3/14 takes precedence) so as to loosen them, e.g. to form a fluidised bed using inert thermally-stabilised particles