An electrode belt made up of a strip of pile-backed foam on which a sheet of conductive silicone rubber is mounted by a snapped together fastener which clamps the sheet to the belt and compresses the sheet to form a suction cup when the belt is applied against the skin of the patient, especially when...http://www.google.es/patents/US4391279?utm_source=gb-gplus-sharePatente US4391279 - Electrode belt