Electrolytic capacitor and method of making

Claim 1

AN ELECTROLYTIC CAPACITOR COMPRISING A CONVOLUTELY WOUND CAPACITOR SECTION HAVING A PAIR OF ALUMINUM FOIL ELECTRODES SEPARATED BY POROUS SPACES, EACH OF SAID ELECTRODES HAVING CONVOLUTED EDGES EXTENDING FROM ONE RESPECTIVE END OF SAID SECTION, EACH OF SAID EDGES RESPECTIVELY BEING BENT OVER AND INTERCONNECTED INTO A COMMON TERMINAL FOR THE RESPECTIVE ELECTRODE, EACH OF SAID BENT OVER EDGES EXTENDING FROM THE CONVOLUTE EDGES OF THE OPPOSITE ENDS OF THE SECTION, A FIRST CONDUCTIVE METAL COATING COVERING SUBSTANTIALLY THE ENTIRE BENT OVER EDGES OF A FIRST OF SAID ELECTRODES AND HAVING PASSAGES FOR PERMITTING FLOW OF ELECTROLYTE BETWEEN SAID BENT OVER EDGES INTO AND OUT OF SAID SECTION, AND AN ELECTRICAL TERMINAL CONNECTED TO SAID COATING, A SECOND CONDUCTIVE METAL COATING COVERING SUBSTANTIALLY THE ENTIRE BENT OVER EGES OF A SECOND OF SAID ELECTRODES AND HAVING PASSAGES FOR PERMITTING FLOW OF ELECTROLYTE BETWEEN SAID BENT OVER EDGES INTO AND OUT OF SAID SECTION, AND AN ELECTRICAL TERMINAL CONNECTED TO SAID COATING, THE EXTENDED BENT OVER FOIL EDGES BEING INTERCONNECTED AT THE RESPECTIVE ENDS BY THE RESPECTIVE FIRST AND SECOND METAL COATINGS, EACH OF SAID BENT OVER EDGES, COATINGS AND TERMINALS PROVIDING THROUGH PASSAGEWAYS INTO THE CONVOLUTE LAYERS OF SAID SECTION FOR CIRCULATION OF ELECTROLYTE AND AN ELECTROLYTE IMPREGNATING SAID SECTION, AN IN SITU FORMED DIELECTRIC ALUMINUM OXIDE ON AT LEAST ONE OF SAID ELECTRODES, SAID ELECTROLYTE BEING RETAINED WITHIN SAID SECTION.