ELECTRIC HEATING DEVICES FOR INDUSTRIAL PURPOSES, NAMELY, THE PROCESSING, SHAPING, SPRAYING AND MOLDING OF PLASTICS, RUBBERS AND SILICONES; ELECTRIC HEATING CARTRIDGES FOR INDUSTRIAL PURPOSES, NAMELY, THE PROCESSING, SHAPING, SPRAYING AND MOLDING OF PLASTICS, RUBBERS AND SILICONES; TEMPERATURE CONTROL DEVICES, NAMELY, THERMO-STATS, THERMO COUPLES, TEMPERATURE-CONTROL SWITCHES, AND ELECTRONIC CIRCUITRY FOR CONTROLLING ELECTRIC HEATERS