Abstract: Usage application of a per se known in the art continuous-operation machine or the recycling of gypsum plaster board. A coarsely pre-pulverized material is introduced into a continuous-operation machine and, within the continuous-operation machine, the waste material 20 is guided along a product-cycle in a spiral-shaped fashion through the container 4 The tools 18, 18', 18", 18'", which are arranged along an axial length on the shaft 7, rotate in a Froude number region Fr.gtoreq.7 and break-up the pre-pulverized waste material 20 to a sufficient extent that a grain spectrum is produced which effectively facilitates the use of calcination devices.

Abstract: A method of treating plasterboard production scrap wherein the pieces of the plasterboard scrap having the plaster attached to paper components, is passed through an apparatus which comprises a cylindrical housing in which radial arms carry ploughshares riding along the wall of the vessel and cutting heads are provided between the paths of the ploughshares. The apparatus so reduces the pieces that a homogeneous mixture of fibers of the paper components and granular gypsum is formed. This product mixed with raw gypsum provides a calcinable mixture which can be calcined for use in producing additional plasterboard.

Abstract: An apparatus for applying glue to the fibers of material, such as wood and the like, especially to cellulose-containing fibers, in which the fibers are supplied to one end of a substantially horizontal drum and removed from the other end thereof with the fibers being impelled through the drum by impelling elements mounted on a central shaft rotatable in the drum and at the inlet end of the drum. Glue is applied to the material downstream from the impelling elements, and downstream from the region of glue application the material is intensively combed by tapering elements mounted on the central shaft. The glue is applied by radial elements mounted on the central shaft and to which glue is supplied through the shaft.