Conductor wires insulated with varnish hardenable by UV radiation - are formed by passing through hardening chamber having UV emitters and reflectors and passage for cooling gas

摘要

Insulating varnish, which is capable of being hardened by radiation, is continuously applied to the heated and possibly pre-treated wire. The thickness of the coat of varnish is calibrated by stripping of the excess varnish. The varnish coat is then hardened by a sufficient quantity of ultra-violet radiation. The varnished wire produced in this way is finally coiled. After hardening of the coat of varnish, one or more additional coats of insulating varnish are applied in a continuous sequence, the additional varnish coats being hardenable by radiation and having different properties in the hardened condition. They are hardened by ultra-violet radiation.