Hoechst Aktiengesellschaft

Agfa-gevaert Ag

Sigri Gmbh

Heinrich Kuhn

Dieter Jaculi

Ulrich Bos

Werner Frass

Engelbert Pliefke

Karl Wimmer

Karl-Friedrich Von Kayser

Olaf Stitz

Frank Herberg

Carsten Hannss

Thermal process for applying hydrophilic layers to hydrophobic

Process for producing a strong bond between copper layers and ceramic

The printing roller according to the invention comprises a core cylinder and a sleeve of plastic. The sleeve is built up from a tubular base body composed of a fiber-reinforced thermoplastic material and the base body is coated on its outer surface with a layer, produced by plasma-spraying, of copper or a copper alloy.

Printing roller with a sleeve of thermally wound fiber-reinforced

Coating graphite and carbon bodies with a protective layer containing predominantly silicon, by plasma spraying a silicon powder with a grain size under 0.05 mm and with an argon/hydrogen mixture as the plasma gas at reduced atmospheric pressure of at most 200 h Ps. The layer thickness is 0.1 to 0.5 mm and has a density which is at least 95% of the theoretical density. The coated bodies, for instance, graphite electrodes have a lower burnoff rate than unprotected ones in an oxidizing or corrosive atmosphere.

Method for coating carbon and graphite bodies

Growing community of inventors

Brechen, Germany

Heinrich Kuhn