Patent 7663059 was granted and assigned to Yazaki on February, 2010 by the United States Patent and Trademark Office.
A cap that covers an electric wire connecting portion in which respective conductive portions of a plurality of electric wires are interconnected is molded in such a manner that one end side of a tube having a tubular shape is hermetically sealed by welding treatment, and a tongue portion is formed by a stamping process on the other end side.