发明名称 Method for forming container scored metal flap areas
摘要 The invention is directed to a metallic easy-opening can end, and to a method of manufacturing the same, the can end having a tear panel which is highly resistant to blowout pressure. The can end is first drawn between a preforming punch and a die to an outwardly open concave configuration, and is thereafter compression scored between a scoring punch and a scoring anvil to reduce the thickness of the drawn metal, thus forming the removable tear panel.
申请公布号 US4027612(A) 申请公布日期 1977.06.07
申请号 US19750596502 申请日期 1975.07.16
申请人 CONTINENTAL CAN COMPANY, INC. 发明人 HERBST, EDWARD J.
分类号 B21D51/44;B21D51/38;(IPC1-7):B21D51/38 主分类号 B21D51/44
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