Abstract: To provide asbestos-cement and like sheets which are formed by build-up of a thin film on a rotating size roll, with an embossed patterned surface; a flexible mould layer of epoxy resin or like mouldable material having counterpart embossments moulded thereon, is removably wrapped about and secured to the size roll with its patterned side outward and before commencement of film build-up on the roll.

Abstract: This invention concerns apparatus for moulding ribs, ridges, studs or other upstanding projections on a mouldable material and although not so restricted it will hereafter be described with reference to its use on apparatus for moulding dry formed fibrous material.

Abstract: The invention relates to a method and an apparatus for the continuous manufacture of longitudinally slit foam pipes using an internal core and two outer mold portions, externally and spacedly surrounding the core, whereby the two outer mold portions are displaced in movement-conforming manner along a path with the formation of a continuous, annular channel open towards a core support and whereby further a sheet is curved in tubular or U-shaped manner, and just before entering the annular channel is supplied with a foam base material which is completely foamed in the annular channel, whereby the foamed hollow profile is formed.

Abstract: Endless plate belts for use in a double belt press are formed from a plurality of articulated plates whose leading and trailing edges are provided with a series of projections and corresponding recesses. Each face of each plate at the leading and trailing belt plate edges defines a series of projections and recesses for meshing with the recesses and projections of adjacent plates. The projections and recesses on one face of a plate edge are arranged alternately with respect to the projections and recesses on the other face of the same plate edge.

Abstract: For the manufacture of tubular bodies of semiconductor material, particularly of silicon, by the precipitation of a layer in the form of a hollow cylinder on a rod or tube-shaped,electrically heated carrier in a reaction gas suitable for the deposition of the semiconductor in question, with subsequent separation of the semiconductor layer from the carrier, the carrier is differentially heated in such a manner that the generated hollow-cylinder layer is given an annular, bead-like reinforcement; the separation of the tube obtained into parts is achieved by a cut made within the reinforcement.

Abstract: An apparatus for the continuous manufacture of phenolic resin foam in an endless sheet which includes means for mixing expandable liquid phenolic resin with a blowing agent and an acid-containing curing agent, optionally with the addition of additives, and means for processing the mixture in a temperature-controllable double belt press. The apparatus also comprises a device for cooling the phenolic resin to a temperature of from about 8 to about 15.degree. C.

Abstract: A roll calender, for calendering rubber or synthetic plastics materials and including roll counter bending means and roll oblique positioning means, wherein at least one roll of the calender has journal portions at the ends thereof supported in main support bearings and outer end portions of the journals engaged in spherical bearings, an outer portion of each spherical bearing has each of its two opposite sides rigidly connected to a respective hydraulic cylinder, each hydraulic cylinder has a piston therein with the piston secured to a vertical piston rod, intermediate the ends of the piston rod, such that counter bending of the roll can be effected by pressurisation of the hydraulic cylinders selectively above or below the pistons, and the ends of the piston rod are engaged in respective grooves in respective fixed support members such that said ends are movable horizontally in said grooves in directions substantially perpendicular to the axis of the roll to allow the axis of the roll to be moved into obliq

Abstract: A shim designed for insertion between mold segments on hot briquette rolls permits accurate alignment of the segments and at the same time, by virtue of its softening and melting temperatures permits uniform expansion of the segments on heating.

Abstract: A briquetting press roll is disclosed which includes a plurality of removable mold segments and means for attaching the mold segments to a cylindrical central core. The mold segments have, on their side walls, connecting means for engaging annular retaining rings. The annular retaining rings span the interface of the mold segments and the central core. The annular retaining rings engage the mold segments and the central core thereby affixing the mold segments to the central core.

Abstract: In making films or molded articles from polyamide, polyimide, or polyamide-imide resins, the problem of stripping or release is successfully solved by applying a noble metal layer on the surface of a film-casting belt or plate or a casting mold to be in contact with the resins.