Apparatus for the application by spraying of plaster on ceilings and on horizontal structures in general, of the type constituted by a container container of the mortar, provided with a lower handle, of lower vertical injectors for the supply of compressed air coming from a container and of an intermediate diaphragm provided with holes aligned with the injectors, delimiting as many projection cones of the material, characterized in that it is provided, in correspondence with one of the upper edges of the container of a guide roller by contact with the surface to revoke, and around the diaphragm of suitable walls to guide the descent of the material by the external part of the diaphragm, facilitating the projection of the mortar. (Machine-translation by Google Translate, not legally binding)
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