发明名称 |
METHOD OF MANUFACTURE OF A COPPER WATCH CASE |
摘要 |
METHOD OF MANUFACTURE OF A COPPER WATCH CASE The method of manufacture of this watch case consists in employing a material including at least 95% copper in its composition, the remainder being made up of elements adapted to increase the mechanical strength of the copper whilst avoiding the toxic elements beryllium and cadmium. Thanks to this material the watch case may be stamped out in a single operation, hardened, then covered with a protective layer deposited galvanically or by a PVD process. |
申请公布号 |
CA2005218(A1) |
申请公布日期 |
1990.06.21 |
申请号 |
CA19892005218 |
申请日期 |
1989.12.12 |
申请人 |
ETA SA FABRIQUES D'EBAUCHES |
发明人 |
LOTH, ERIC;WALDER, PIERRE-ALAIN |
分类号 |
C22C9/06;C22F1/00;C22F1/08;G04B37/22;(IPC1-7):C22F1/08;B23P15/00 |
主分类号 |
C22C9/06 |
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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