Apparatus to skim the plaster at a wall has a rotating screw within a longitudinal housing to project through an opening to give the required plaster thickness

摘要

The apparatus to skim freshly applied plaster, at a wall, has a rotating screw (4) within a longitudinal housing (3). The screw is powered by a drive (5). A part of the screw periphery projects through an opening in the housing, along its longitudinal line (L).