EQUIPMENT FOR THE MANUFACTURE OF TEXTILE THREADS COATED WITH A LAYER OF A PRECIOUS METAL, IN PARTICULAR GOLD

摘要

The equipment (1) comprises a creel (2) with a plurality of bobbins (3) onto which is wound base threads (4) of natural or synthetic yarn (5) provided with a coating (6) of electroconducting material, in particular silver, a gathering structure (7), with a plurality of motor-driven winding bobbins (8) intended to draw and receive the coated threads (9); distribution and guidance devices (12, 13) intended to arrange the base yarn (4) in at least one essentially horizontal group (14) of parallel threads along a defined route between the creel (2) and the gathering structure (7), and electroplating equipment (15) in which there is a plurality of successive galvanic baths along the route containing a solution of a noble or precious metal salt. The arrangement is such that in operation at least one group (14) of threads is successively immersed in the bath present in the vats (17-23) of the electroplating equipment (15) and the threads therein are galvanically coated with a layer (9a) of noble or precious material of progressively increasing thickness.