A separator manufacturing apparatus includes a transfer roller (2) with a plurality of annular shaping grooves (1) having a predetermined shape in cross section which are formed in the outer circumferential surface of the transfer roller (2) in its circumferential direction, a resin feeding device (4)...http://www.google.es/patents/US4957423?utm_source=gb-gplus-sharePatente US4957423 - Separator manufacturing apparatus
