with movement in a helical path

Full Title

Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form > with movement in a helical path

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

DRYING

Subclass:

DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM