发明名称 Die-set combination for making pin-back badges
摘要 The present invention concerns a combination of mutually interfitting die and press-block elements adapted for manual use and operation with each other to produce a finished and permanent assembly of the separate components of a pin-back button or badge.
申请公布号 US4299019(A) 申请公布日期 1981.11.10
申请号 US19790024154 申请日期 1979.03.26
申请人 BADGE-A-MINT LTD. 发明人 ROEBUCK, MALCOLM J.
分类号 B21D53/48;(IPC1-7):B23P11/00 主分类号 B21D53/48
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