发明名称 |
Methods for making an easy-opening can end |
摘要 |
A method for making an easy-opening can end comprising providing an upper die and a lower die, at least one of the upper die and the lower die having a curved surface with a radius of 0.1 to 1 mm at the tip portion thereof, the other die having a flat surface at the tip portion thereof; and press-forming an end panel by using the upper die and the lower die to form a score on the upper surface or the lower surface of the end panel so that the end panel has a thickness of 0.025 to 0.08 mm at the thinnest portion thereof.
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申请公布号 |
US6837093(B2) |
申请公布日期 |
2005.01.04 |
申请号 |
US20020103217 |
申请日期 |
2002.03.20 |
申请人 |
NKK CORPORATION |
发明人 |
YAMASAKI YUJI;KURIHARA MASAYOSHI;FUJIKAKE MASAHISA;YOMURA YOSHINORI;SUGIHARA REIKO;MIHARA YUTAKA |
分类号 |
B21D51/38;B21D51/44;B65D17/34;(IPC1-7):B21D51/44 |
主分类号 |
B21D51/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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