Abstract: The invention is directed to a method for producing a multi-layered elastic printing blanket such as an offset printing blanket having a structured surface. The printing blanket includes reinforcement carrier layers, an elastic intermediate layer and a cover layer made of rubber or a rubber-like material. The cover layer has a structured surface which is formed by first applying particles, which volatilize under the application of heat, to the unvulcanized cover layer and thereafter applying heat under the application of force thereby causing the particles to assume a gaseous state while generating pressures which impart a roughness to the surface of the cover layer.

Abstract: A variable-volume receptacle, especially for use as a compensating receptacle in heating systems. The receptacle includes two membrane-like sheets of rubber or synthetic material; the sheets have the same surface areas, and are placed against one another. The edges of the sheets are bound together by a peripheral U-shaped strip which is attached to both sides. The novel edge connection is considerably more durable than the conventional overlap connection, and as a result of not being susceptible to the otherwise constant danger of tearing due to having been folded, the connection also has a much longer life than do the heretofore known overlap connections.