METHOD FOR CONTROLLING ETCHING OF ELECTROLYTIC CAPACITOR FOIL

METHOD FOR CONTROLLING ETCHING OF ELECTROLYTIC CAPACITOR FOIL In a process for etching aluminum foil, a wire coil is placed adjacent the foil as it exits the etch station. The voltage induced by eddy currents produced in the foil by the energized coil is sensed at the same coil or another coil. The...

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Hauptverfasser:	SILVEIRA, JOSEPH H, HEBERT, JOHN R., JR, HERZIG, ROBERT W
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY ELECTRICITY ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS
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Beschreibung
Zusammenfassung:	METHOD FOR CONTROLLING ETCHING OF ELECTROLYTIC CAPACITOR FOIL In a process for etching aluminum foil, a wire coil is placed adjacent the foil as it exits the etch station. The voltage induced by eddy currents produced in the foil by the energized coil is sensed at the same coil or another coil. The foil drawing speed through the etch station is altered in response to that sensed voltage, or another process parameter is changed, so as to maintain at a constant value the ratio of the actual to apparent foil surface area.