determining means for determining a criterial position of the ejector pins where {HEAD ~ the detected elastic force} of {TAIL ~ the springs} is equivalent to the retaining force of the brake means; and 
of
determining means for determining a criterial position of the ejector pins where { HEAD ~ the detected elastic force } of { TAIL ~ the springs } is equivalent to the retaining force of the brake means ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH