Apparatus and method of treating tabs of printed circuit boards and the like

Abstract From the Canadian patent

Printed circuit boards are carried generally vertically along a, path, with the tabs at the lower end being immersed in an electrolyte. The boards are automatically conveyed through opposed serially arranged pairs of rollers, which drive them along their path. Brushes wipe the boards to prevent contact with electrolyte above the desired contact level as they are conveyed, along the path. The solution is constantly replenished and turbulence provided by delivering electrolyte solution with insoluble metallic ions in it, by pumping the solution from a sump through an array of nozzles along each side of the path, thus providing fresh electrolyte along with providing turbulence to the …