in fig2 the inner drum is perforated and is mounted on a drum shaft 10 that rotates in bearings not separately shown in front plate 8 and at a suitable location not shown towards the aft end of the drum the inner drum may include a plurality of elongated generally longitudinally extending vanes 12 that project perpendicular to and radially inwardly from the inner drum wall and extend along a thread like or helical line over the length of the inner drum for example three such vanes may be equally spaced about the inside of the inner drum the front plate 8 of the drum includes a viewing window 14 through which the interior of the inner drum can be seen from the outside the front plate may also include a roasted bean discharge chute 16 which is normally closed with a sealed valve or gate not shown and through which a batch of beans following their roasting can be discharged by opening the gate fresh or green coffee beans are roasted by first placing a batch into the drum where they come to rest at the bottom of inner drum 4 hot air of the appropriate temperature say about 700 u00b0 f is suitably introduced into and or flowed through the drum and the inner drum is rotated this causes the radially inwardly extending vanes 12 to pick up quantities of beans in a pocket defined by each vane.