U.S. Philips Corporation

Karlheinz Schelhas

Bernhard N Lersmacher

Hans J Lydtin

Wilhelmus F Knippenberg

Siegfried Nerche

Cuvettes of carbonized laminated fabric with a surface layer of pyrolytic graphite are easy to manufacture, have a high mechanical rigidity and no memory effect and enable the operation of analysis apparatuses at normal mains voltage (220 V).

Cuvette for flameless atom absorption spectroscopy

A foamed synthetic body is impregnated with a resin which can be converted into vitreous carbon by heating, after which by raising the temperature the body is dried and the resin is hardened, after which, if desired, one or more surfaces of the body are again treated with the impregnating agent and the body is then carbonized by further rise in temperature. In order to ensure that the foamed synthetic body remains stable during the whole preparation, the body is soaked with liquid epoxide resin or an aqueous polyvinyl alcohol solution before impregnation.

Growing community of inventors

Aachen, Germany

Karlheinz Schelhas