Sheet-type packs which exert a skin cleaning effect while maintaining an effect of appropriately moistening the skin and are excellent in the feel in using and safety to the skin. The receiver is able to recover data from a corrupted waveform from a signal wire such as one found on data, address or control wires in a microsystem architecture. A second end portion of the coupler body is also cold-forged in successive steps after treatments and is either reduced in diameter to receive external threads or is formed with a second bore.