{HEAD ~ means} for introducing a predetermined amount of {TAIL ~ charge} determined by a potential applied to the input portion into a portion beneath a predetermined electrode while driving an electrode on the transfer portion 
{ HEAD ~ means } for introducing a predetermined amount of { TAIL ~ charge } determined by a potential applied to the input portion into a portion beneath a predetermined electrode while driving an electrode on the transfer portion
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH