Paul Troester Maschinenfabrik

Harry Focht

Apparatus for the dry cross linking of strands of elastomer, in particular in the production of elastic cables and multilayered profiles comprises a string of tubes through which the strand passes. Between adjacent tube sections, there are hollow bodies having central cavities in line with the bore of the tubes and a plurality of branch cavities radiating from the central cavity. One of the branch cavities is connected through a UHF transformer and a wave guide with the UHF generator while tuning probes are arranged in other branch cavities. The UHF transformer has an inwardly diverging tapered opening in which a tapered plug of ceramic or plastic is fitted to provide a pressure seal. The interior of the tube sections and the hollow bodies is supplied with inert gas under pressure.

Apparatus for the dry crosslinking of strands of elastomers

Apparatus for heating continuous sponge rubber products by UHF energy to vulcanize them comprises a UHF generator connected to a resonator chamber through which the product passes by a wave guide which divides into two branches connected with the resonator chamber at spaced points. Each branch of the wave guide is tunable by a separate tuning device one of which is operable manually and the other is operated by a motor controlled by sensing probe in a circulator in the wave guide between the UHF generator and the branches. Uniform heating of the product is thereby obtained.

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Hemmingen, Germany

Harry Focht