Production of electrical elements

Claim 1

A PROCESS FOR IMPRINTING A CIRCUIT ELEMENT UPON A SUBSTANTIALLY SMOOTH SURFACE OF ELECTRICAL INSULATING SYNTHETIC PLASTIC MATERIAL, WHICH COMPRISES APPLYING TO SELECTED AREAS OF SUCH PLASTIC MATERIAL, A SLURRY OF FINELY DIVIDED CIRCUIT ELEMENT FORMING PARTICLES IN A VOLATILE LIQUID THAT IS INERT TO THE PLASTIC, AND, PRIOR TO COMPLETE EVAPORATION OF THE VOLATILE LIQUID, APPLYING MECHANICAL PRESSURE UPON THE SLURRY COVERED PLASTIC OF THE ORDER OF 500 TO 2000 POUNDS PER SQUARE INCH AND HEAT OF THE ORDER OF 150 TO 250* C. FOR A PERIOD OF TIME OF THE ORDER OF 0.5 TO 10 SECONDS, WITH THE RESULTANT COMPLETE EVAPORATION OF THE VOLATILE, LIQUID, TO THEREBY SECURE EMBEDDING OF THE CIRCUIT ELEMENT FORMING PARTICLES IN THE SURFACE OF THE PLASTIC MATERIAL AND COHERENCE OF SUCH PARTICLES WITHOUT SUBSTANTIALLY IMPAIRING THE ELECTRICAL PROPERTIES OF THE SURFACE OF SAID MATERIAL.