Wouni) electric capacitor

Claim 1

A WOUND ELECTRICAL CAPACITOR COMPRISING AT LEAST TWO COMPOSITE FOILS WOUND TO FORM A CAPACITOR, EACH COMPOSITE FOIL CONSISTING OF TWO STRIP-LIKE VARNISH LAYERS AMOUNTING TO LESS THAN 6 MICRONS, AND A METAL COATING DISPOSED BETWEEN SAID LAYERS, SAID METAL COATING HAVING A RELATIVELY SMOOTH SURFACE AT ONE FACE THEREOF AND A RELATIVELY ROUGH SURFACE AT ONE FACE THEREOF WITH THE METAL FORMING THE SAME FILLING THE PORES OF THE ADJACENT VARNISH LAYER, ANY METAL PEAKS OF SAID RELATIVELY ROUGH SURFACE HAVING A HEIGHT WHICH IS AT MOST EQUAL TO THE THICKNESS OF SUCH ADJACENT VARNISH LAYER, THE OTHER VARNISH LAYER HAVING A THICKNESS AT LEAST EQUAL TO THAT OF SIAD FIRST MENTIONED VARNISH LAYER AND FORMING THE PRIMARY CAPACITOR DIELECTRIC, SAID SECOND VARNISH LAYER BEING DISPOSED AT THE SMOOTH FACE OF SAID METAL COATING FREE OF METAL PENETRATION IN ANY PORES THEREOF AND HAVING A HIGHLY UNIFORM OPERATIVE THICKNESS, THE METAL COATING ON ONE OF SAID COMPOSITE FOILS EXTENDING FROM ONE LATERAL EDGE OF THE VARNISH LAYERS THEREOF FLUSH WITH SUCH EDGE TO A POINT SPACED FROM THE OPPOSITE LATERAL EDGE OF THE VARNISH LAYERS THEREOF TO FORM A METAL-FREE BORDER STRIP THEREAT, THE METAL COATING OF THE OTHER COMPOSITE FOIL BEING SIMILARLY DISPOSED BUT WITH THE METAL COATING SPACED FROM THE OPPOSITE LATERAL EDGE OF THE VARNISH LAYERS THEREOF TO FORM A METAL-FREE BORDER STRIP THEREAT, EACH OF THE RESPECTIVE METAL COATINGS THUS EXTENDING TO A RESPECTIVE END OF THE CAPACITOR.