发明名称 Master pattern for producing cast raised figures
摘要 A master pattern for the casting of raised figures such as lettering on a plaque or plate is produced by hobbing the figures into a material which has been pre-formed with suitable void or open spaces to accommodate the material displaced during hobbing.
申请公布号 US3893822(A) 申请公布日期 1975.07.08
申请号 US19730368642 申请日期 1973.06.11
申请人 CAMILLERI, THOMAS M. 发明人 CAMILLERI, THOMAS M.
分类号 B21K5/20;(IPC1-7):B22F5/00 主分类号 B21K5/20
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