Abstract: A process for the electrical insulation of wire by enamelling, using aqueous dispersions which are applied thereto by means of applicator rollers. The thickness of the dispersion coating on the wire can be varied by merely suitably selecting the circumferential speed of the applicator rollers.

Abstract: A process for continuously testing the thickness of the enamel coating of electric wires, in which the wire, after enamelling, passes between a fixed and a movable measuring roller. The wire is wrapped around the fixed measuring roller such that its wrap-around angle has a value between 0 and 15 degrees and the fixed and movable measuring rollers are positioned relative to each other such that their respective planes of symmetry are vertically displaced by a value between 0.5 and 2 mm. Using the process according to the invention, the thickness of enamel applied to the wire can be kept constant to about 0.5 .mu.m.

Abstract: A process for the electrical insulation of metallic conductors by coating wires with aqueous dispersions of coating materials, comprising the following steps which are carried out in a single cycle: introducing the starting dispersion into a storage zone A; continuously withdrawing part of the dispersion from the storage zone and feeding said part to a dispersing zone, where it is homogenized and comminuted; if necessary, cooling the dispersion to below 40.degree. C in a cooling zone; feeding the dispersion to a fractionating zone D, where it is separated into a coarse fraction and a fine fraction; and finally, passing the fine fraction through coating zones E, through which wires are drawn so as to receive a coating.