An apparatus for manufacturing a glass stem for an electron tube has a plurality of lead-in conductors and a plurality of fillets with the lead-in conductors extending through the fillets. The apparatus comprises a first stem mold assembly and a second stem mold assembly for forming the stem therebetween....http://www.google.co.uk/patents/US4813991?utm_source=gb-gplus-sharePatent US4813991 - Universal stem mold for manufacturing a molded glass stem
