Abstract: In a pivoted drum, e.g., a dragee coating drum for coating granular surfaces, a pivoted nozzle carrier (26b) projects along the drum axis, while forming an annular chamber (57), from which extends a multitude of similarly arranged elbows (64) with spray nozzles (65). A casing tube (22) surrounding the nozzle arrangement forms a lid (73) which, when in operating position, is opened by the spray nozzles, so that a spray can be sprayed into the coating chamber outside the casing tube (22). When in cleansing position (65'), the spraying device is completely sealed off to the outside and can be thoroughly rinsed with a cleansing agent which is drained off inside the casing tube (22) by the gutter (69) and the drain pipe (71). The cleansing processes can then be executed during the short intervals between coating, without interrupting the overall program.

Abstract: A pill-coating apparatus for covering granulets such as pill cores with a multilayer coating has a coating drum rotatable about a substantially horizontal axis, the drum being formed with a hub at each axial end thereof supported in two pivot bearings axially spaced apart from one another, wherein at least one of the two pivot bearings is formed as a rotatable linkage, comprising a roller bearing connected to a support rotatably adjustable in any direction.

Abstract: A drum rotating about a horizontal axis, designed to coat dragee pellets or other granules with a hardenable substance, has a polygonal--preferably nine-sided--peripheral wall and corresponding frustopyramidal end walls. The peripheral wall consists of angularly adjoining panels and has an access aperture extending partly over two such panels, this aperture being sealable by a gabled flap hinged to the drum at its trailing edge and adapted to be locked in a closed position by a sliding bolt coacting with a latching cylinder and an unlatching cylinder in a certain angular position of the drum whereby the unlatched flap will swing open on leaving that position and will swing closed on reapproaching it.