A simple yet reliable sealing assembly for a vacuum compression mold. Molding apparatus for compression molding a charge under vacuum includes an upper die having a molding surface and outer side walls. A lower die has a complimentary molding surface and side walls substantially aligned with the side...http://www.google.fr/patents/US5370521?utm_source=gb-gplus-shareBrevet US5370521 - Compression mold with vacuum seal
