Device for electroplating on translating metal sheets, especially for printed circuits, by closure of an electric circuit between the sheets and a liquid reactant product

A device in an installation for electro-plating a film on metal sheets in a continuous translation through a channel by a transporting means, wherein the transporting means are positioned in parallel and said electroplating effected by means of a chemical reaction with a liquid product characterized in that the device comprises:

• one or more operative units each comprising one or more pairs of metal contact rollers resting laterally one above another through which the said sheets translate and wherein said contact rollers are drawn along in axial rotation reciprocally in opposite directions by means of a mechanism, and
• one or more oblong sealed chamber(s)forming a first sealed chamber, positioned above a trajectory followed by the said sheets, wherein the said oblong sealed chamber(s)are provided with an internal oblong electrode and a pump, said pump comprising a set of tubular nozzles with coplanar axes side by side and parallel wherein the said pump is adapted for recycling liquid product from a bath below and pumps it under pressure into said chamber and wherein the oblong sealed chamber(s) further comprise an electic-electronic drive unit that is adapted to generate direct current and operate the movement of said pairs of rollers, action of the pump and translation of the sheets in accordance with a program;
• and
• an electrode inside said oblong sealed chamber(s) and said pairs of contact rollers reciprocally electrically insulated and respectively connected to two poles of a direct current, supplied by the electric-electronic drive unit;
• said liquid, pumped into the oblong sealed chamber(s) through nozzles, being projected, as said sheets pass between the rollers of the pairs of contact rollers onto areas of the sheets as they appear from between said pairs of contact rollers and therefore electro-plating on said sheets due to closure of an electric circuit generated by the direct current between said liquid and said sheets through said pairs of contact rollers.